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Contract C3 - 1 C3 Part C3: Scope of Work Scope of Work Reference No. CTIA RFB - 2016

AIRPORTS COMPANY SOUTH AFRICA CAPE TOWN INTERNATIONAL AIRPORT CONTRACT No: CTIA RFB 39 - 2016 CONSTRUCTION OF A NEW PUMP STATION AT THE CAPE TOWN INTERNATIONAL AIRPORT

Part C3: Scope of Work

Pages

C3.1 Description of the Works ........................................................... C3-2

C3.2 Engineering ................................................................................. C3-4

C3.3 Procurement ............................................................................... C3-6

C3.4 Construction ............................................................................... C3-7 C3.5 Management ............................................................................ C3-463 C3.6 Annexes ................................................................................... C3-472

Status Should any requirement or provision in the parts of the Scope of Work conflict with any requirement of any Standardised Specification, particular specification or any drawings, the order of precedence, unless otherwise specified, is: Drawings Scope of Work (Parts C3.1, C3.4 C3.5 and C3.6) SANS Standardised Specifications

Contract C3.1 Part C3: Scope of Work Description of the Works Reference No. CTIA RFB 39 - 2016

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C3.1 Description of the Works

CONTENTS

1. EMPLOYER’S OBJECTIVES 2. OVERVIEW OF THE WORKS 3. WORK TO BE UNDERTAKEN BY OTHERS 4. LOCATION OF THE WORKS 1. EMPLOYER’S OBJECTIVES The Airports Company of South Africa (ACSA), intends to replace the existing Egoli Pump Station and

rising main infrastructure at the Cape Town International Airport. 2. OVERVIEW OF THE WORKS 2.1 Description

This contract covers the civil, mechanical and electrical works associated with the construction of a new pump station at Cape Town International Airport. The existing Egoli Pump Station is under severe strain mainly due to an inadequate sump volume to cope with current and projected 2020 year flows. As a result the pump cycle is much higher than the industry norm thereby placing stress on the existing pumps causing more frequent maintenance requirements and often failures. The description of the project contained in the Scope of Work is merely an outline of the Contract Works and shall not limit the work to be carried out by the Contractor under this Contract. Details of some of the major items are given in this section and approximate detailed quantities for each type of work to be carried out in accordance with the Contract Documents are included in the Bill of Quantities The mechanical/electrical scope includes all required basic and detail engineering and design of plant and equipment, based on the Engineer's criteria as laid down in this document and the attached drawings, to achieve a complete, integrated working system. Where adaptations of the Engineer’s design are necessary to meet the Contractor’s specific requirements, approval shall be obtained from the Engineer. 'Design / Engineering' includes all documents required to be incorporated into the Operating and Maintenance Manuals. The civil scope provides for the construction of new concrete water retaining structures and new brick buildings housing MCC panels. Upgrading of the existing civil infrastructure with respect to reconstruction of existing parking area and installation of new and replacement of various diameter pipelines are also to be undertaken. The following is a brief description of the works to be undertaken: CIVIL 1. New concrete pump station – to replace the existing deteriorating works. 2. New brick buildings housing electrical cabinets –Pump station MCC building 3. Construction and repair of existing road and parking infrastructure, including new stormwater

collection systems. 4. New 250mm diameter uPVC rising main and associated isolation valves, airvalves, etc. 5. Various manholes

Contract C3.1 Part C3: Scope of Work Description of the Works Reference No. CTIA RFB 39 - 2016

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MECHANICAL/ELECTRICAL: Supply of; 6. Pumping Equipment 7. Associated pipework, valves (gate, air valve, non-return, etc), etc 8. New Motor Control Center (MCC), flow measurement, level measurement, instrumentation, interface

connections 9. Associated work for Mechanical/Electrical equipment.

Delivery, off-loading, transport, double handling (if required), storage, erection, installation, commissioning, testing, adjustment, handing over, as a complete working installation, in complete working order and operating for the Trial Operation Period as specified and upholding during the Defects Notification Period of all equipment and services under this contract. Details are found in the respective sections of this document. NOTE The final detail for all the Civil and Builder’s Scope of Works required for the all of the above Plant and Equipment shall be fully defined by the Contractor to suit his equipment offered.

2.2 Boundaries of the site

The site of the works shall consist of a demarcated area in parking area 3 (P3) which encompasses the new and existing Egoli Pump Station and along the rising main pipe route which follows freight road, construction camp, any storage area on the site which the Contractor may require in addition to the area required for construction works as defined by the limits of construction, plus such additional length that is necessary for the erection of the road signs on the approaches to the Works.

2.3 Occupation of the Site

The site is under the jurisdiction of the Airports Company South Africa (ACSA). The site falls on “landside”.

3. EXTENT OF THE WORKS

The work that is to be carried out under the contract is as provided for in the schedule of quantities. However, if during the course of construction conditions are found to differ from those anticipated, the Engineer reserves the right to modify the scope of the work to suit the prevailing conditions and circumstances. Variations introduced in this manner will be measured and paid for at the rates tendered for appropriate items listed elsewhere in the schedule of quantities or in the absence of such rates, as extra work.

4. LOCATION OF THE WORKS

Access to the Cape Town International Airport is from Approach Road off the N2 highway. The Works is about 25 kms from Cape Town.

Contract C3.2 Part C3: Scope of Work Engineering Reference No. CTIA RFB 39 - 2016

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C3.2 Engineering DRAWINGS ISSUED WITH THIS DOCUMENT The following drawings are applicable to the contract and are issued with this tender document and will form part of the Contract Documents as Volume 4. The drawings contained in these documents show generally the character and extent of the proposed works, but they shall not be held as showing or describing all or every position of the works to be executed. Additional and detailed drawings will be furnished by the Engineer as the works proceeds. DRAWING NUMBER

DESCRIPTION

120296/C/DR/PS/00

Key Plan

120296/C/DR/PS/01

Site Survey Sheet 1 of 5

120296/C/DR/PS/02


120296/C/DR/PS/03


120296/C/DR/PS/04


120296/C/DR/PS/05 Site Survey Sheet 5 of 5 120296/C/DR/PS/10

Pump Station Site Layout

120296/C/DR/PS/11 Layouts, Sections and Elevations 120296/C/DR/PS/13 Pump Station General Notes 120296/C/DR/PS/14 Standard Door Drawing

120296/C/DR/RM/1 Rising Main Longsection (Sheet 1 of 5) 120296/C/DR/RM/2 Rising Main Longsection (Sheet 2 of 5) 120296/C/DR/RM/3 Rising Main Longsection (Sheet 3 of 5)

120296/C/DR/RM/4 Rising Main Longsection (Sheet 4 of 5) 120296/C/DR/RM/5 Rising Main Longsection (Sheet 5 of 5) Type drawings RO2272sh01A, 02, 03, 05, 07 and 08

Electrical Drawings 120296/E/DR/PS/001 Site Layout: LV & Fibre Optic Cable Reticulation Layout 120296/E/DR/PS/010 Egoli Pump Station Site: Sleeve & Manhole Layout

120296/E/DR/PS/020 Egoli Pump Station : Electrical Layout

Contract C3.2 Part C3: Scope of Work Engineering Reference No. CTIA RFB 39 - 2016

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120296/E/DR/PS/030 Pump Station MCC (MCC-EPS) GA 120296/E/DR/PS/031 Pump Station MCC (MCC-EPS) SLD 120296/E/DR/PS/040 Typical Cables in Trench, Manhole & Cable Route Marker Detail 120296/E/DR/PS/041 Typical DOL LV Starter Panel Schematic

120296/E/DR/PS/42 Typical MCC Cubicle Door Layout

120296/E/DR/PS/043 Field Control Station Layout 120296/E/DR/PS/044 Typical Instrumentation Transmitter Enclosure NOTES: Any reduced drawings that form part of the tender documents shall be used for tender purposes only. The Contractor will be supplied with three (3) unreduced paper print of each of the drawings required for construction. These copies are issued free of charge and the Contractor shall make any additional copies he may require at his own cost. Only figured dimensions shall be used and drawings shall not be scaled unless otherwise instructed. The Contractor shall ensure that accurate as-built records are kept of all infrastructure installed or relocated during the contract. The position of pipe bends, junction boxes, duct ends and all other underground infrastructure shall be given by either co-ordinates, or stake value and offset. Where necessary, levels shall also be given. A marked-up set of drawings shall also be kept and updated by the Contractor. This information shall be supplied to the Engineer’s Representative on a regular basis. Any information in the possession of the Contractor, which the Engineer requires to complete his record drawings shall be supplied to the Engineer’s Representative before a certificate of completion will be issued.

Contract C3.3 Part C3: Scope of Work Procurement Reference No. CTIA RFB 39 - 2016

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C3.3 Procurement

C3.3.1 PREFERENTIAL PROCUREMENT PROCEDURES

The Works shall be executed in accordance with the requirements specified in Section T1.2, Tender Data (Clause F3.11) and submitted by the Contractor in his Returnable Schedules.

C3.3.2 SUBCONTRACTING

If the Contractor wishes to subcontract any part of the Works only registered CIDB contractors may be appointed in accordance with the subcontracting procedures set out in the General Conditions of Contract. The Contractor should note that a specialist Sub-contractor is required for the mechanical installation including its associated electrical installation requirements. The mechanical and electrical installation shall form part of this Contract, and shall be carried out by a specialist Sub-contractor who must be CIDB rated for the value of the mechanical/electrical component of the Contract. The Tender Conditions, Special Conditions and Specifications of the main contract shall apply to this Sub-contract with the exception of payment and additional clause included in this document. Where monetary allowances for provisional sums or prime costs items have been allowed and the monetary allowance is less than R200 000, the Contractor shall invite three quotations from suitably qualified subcontractors, etc. for the required scope of works. The selection of the Subcontractors, etc. shall be approved by the Engineer. Where monetary allowances for provisional sums or prime cost items have been allowed and the monetary allowance is greater than R200 000, the Contractor shall invite five quotations from suitably qualified subcontractors, etc. for the required scope of works. The selection of the Subcontractors, etc. shall be approved by the Engineer. The Contractor shall provide any necessary facilities in order to manage his own subcontractors (if any) to ensure that the works are carried out in accordance with:

• The programme of works, and

• The contract requirements, and

• The requirements concerning access to and from the airport facilities. He shall also ensure that the subcontractor complies with the requirements of the Safety Plan, Environmental Management Plan and Operational procedure requirements.

Contract C3.4 Part C3: Scope of Work Construction Reference No. CTIA RFB 39 - 2016

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C3.4 Construction

CONTENTS

SECTION TITLE SUBSECTION

PROJECT SPECIFICATIONS PAGE NO.

SECTION A: CIVIL SECTION A1 General C3-10

SECTION A2 Variations to Standard Specifications C3-20

SECTION A3 Particular Specifications C3-94

SECTION B: MECHANICAL SECTION B1 Detailed Mechanical Specification C3-134

SECTION B2 Standard Mechanical Specification C3-158

SECTION C: ELECTRICAL SECTION C1 Detailed Electrical & Electronic Specification

C3-216

SECTION C2 Standard Electric Specification C3-239

SECTION C3 Standard Electronic Specification C3-351

SECTION D: MISCELLANEOUS

Graphs C3-388

SECTION E: OHS Occupational Health and Safety Specification

C3-390

SECTION F: ENVIRONMENTAL Environmental Specifications C3-446

Contract C3.4 Part C3: Scope of Work Section A Reference No. CTIA RFB 39 - 2016

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SECTION A: CIVIL PROJECT SPECIFICATION

CONTENTS

Page

SECTION A1 : GENERAL ................................................................................................................. C3-10

PS1 DESCRIPTION OF THE WORKS ......................................................................................... C3-10

PS2 DESCRIPTION OF SITE AND ACCESS ............................................................................... C3-10

PS3 EARTHWORKS AND SUBSOIL CONDITIONS ................................................................... C3-10

PS4 ENVIRONMENTAL CONDITIONS OF SITE ......................................................................... C3-11

PS5 PHASING OF WORK AND FINANCIAL LIMITATIONS ....................................................... C3-11

PS6 CONSTRUCTION PROGRAMME, ESTIMATED MONTHLY CASH FLOW AND

ADHERENCE THERETO ...................................................................................................... C3-11

PS7 ATTENDANCE ON OTHER CONTRACTORS ..................................................................... C3-12

PS8 DOCUMENTS AND DRAWINGS .......................................................................................... C3-12

PS9 DELAYS DUE TO NON-SUPPLY OF MATERIALS, USE OF LOCALLY

MANUFACTURED MATERIALS AND IMPORTED MATERIALS ........................................ C3-13

PS10 SITE FACILITIES AND CONTRACTORS CAMP/DEPOT ................................................... C3-13

PS11 CONTRACTORS CAMP/DEPOT AND OTHER FACILITIES ............................................... C3-14

PS12 ACCOMMODATION FOR CONTRACTOR'S EMPLOYEES ................................................ C3-15

PS13 FACILITIES REQUIRED BY THE ENGINEER ..................................................................... C3-15

PS14 FEATURES REQUIRING SPECIAL ATTENTION ................................................................ C3-15

PS15 HOURS OF WORK ................................................................................................................ C3-17

PS16 SAFETY OF THE WORKMEN .............................................................................................. C3-18

PS17 APPLICABLE STANDARDISED AND PARTICULAR SPECIFICATIONS .......................... C3-18

PS18 MEASUREMENT AND PAYMENT ....................................................................................... C3-19

SECTION A2 : VARIATIONS TO STANDARDISED SPECIFICATIONS ....................................................

PSA GENERAL ................................................................................................................. C3-20

PSAB ENGINEER'S OFFICE ........................................................................................................... C3-24

PSC SITE CLEARANCE ................................................................................................................ C3-29

PSD EARTHWORKS ................................................................................................................. C3-31

PSDB EARTHWORKS (PIPE TRENCHES) .................................................................................... C3-38

PSDK GABIONS AND PITCHING ................................................................................................... C3-43

PSDM EARTHWORKS (ROADS, SUBGRADE) .............................................................................. C3-46

PSG CONCRETE STRUCTURAL ................................................................................................. C3-47

PSH STRUCTURAL STEEL .......................................................................................................... C3-58


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Page

PSHC CORROSION PROTECTION OF STRUCTURAL STEEL .................................................... C3-59

PSL MEDIUM-PRESSURE PIPELINES ........................................................................................ C3-60

PSLB BEDDING (PIPES) ................................................................................................................. C3-73

PSLC CABLE DUCTS ... ................................................................................................................. C3-77

PSLD SEWERS .... ......... ................................................................................................................. C3-81

PSLE STORMWATER DRAINAGE ................................................................................................. C3-86

PSME SUBBASE .. ......... . ................................................................................................................ C3-90

PSMF BASE ......... ......... ................................................................................................................. C3-90

PSMJ SEGMENTED PAVING.......................................................................................................... C3-91

PSMK KERBING AND CHANNELLING .......................................................................................... C3-92

PSMM ANCILLARY ROADWORKS ................................................................................................. C3-93

SECTION A3 : PARTICULAR SPECIFICATIONS .......................................................................................

PA BRICKWORK, BLOCKWORK AND PLASTERING ............................................................. C3-95

PB CARPENTRY, JOINERY, TIMBERWORK AND CEILINGS ............................................... C3-103

PC STEEL DOORS, WINDOWS, GLAZING AND FIRE PROTECTION EQUIPMENT .......... C3-108

PD PAINTING (OTHER THAN STRUCTURAL STEELWORK) ............................................... C3-113

PE PIPELINE VALVES ............................................................................................................. C3-118

PG GRASSING ......................................................................................................................... C3-124

PH FENCING ......................................................................................................................... C3-128


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SECTION A1 : GENERAL

PS1 DESCRIPTION OF THE WORKS

PS1.1 General

The Airports Company of South Africa (ACSA), intends to replace the existing Egoli Pump Station and rising main infrastructure at the Cape Town International Airport.

PS1.2 Scope of Contract

This contract covers the civil, mechanical and electrical works associated with the construction of a new pump station at Cape Town International Airport. The following is a brief description of the works to be undertaken: CIVIL 1. New concrete pump station – to replace the existing deteriorating existing works. 2. New brick buildings housing electrical cabinets –Pump Station MCC building 3. Construction and repair of existing road and parking infrastructure including storm

water collection systems. 4. New 250mm diameter uPVC rising main and associated isolation valves, air valves, etc. 5. Various manholes

MECHANICAL/ELECTRICAL: Supply of; 6. Pumping Equipment 7. Associated pipework, valves (gate, air valve, non-return, etc), etc 8. New Motor Control Center (MCC), flow measurement, level measurement, instrumentation, interface connections 9. Associated work for Mechanical/Electrical equipment. Delivery, off-loading, transport, double handling (if required), storage, erection, installation, commissioning, testing, adjustment, handing over, as a complete working installation, in complete working order and operating for the Trial Operation Period as specified and upholding during the Defects Notification Period of all equipment and services under this contract. Details are found in the respective sections of this document. NOTE The final detail for all the Civil and Builder’s Scope of Works required for the all of the above Plant and Equipment shall be fully defined by the Contractor to suit his equipment offered.

PS2 DESCRIPTION OF SITE AND ACCESS

Access to the Cape Town International Airport is from Approach Road off the N2 highway as

indicated on the Locality Plan. The Works is about 25 kms from Cape Town.

PS 3 EARTHWORKS AND SUBSOIL CONDITIONS

A geotechnical investigation has been undertaken. A comprehensive report can be referred to under section C4: Site Information.

Although the information given is accurate and representative of the conditions at test hole locations, there is no guarantee that such information is representative of the entire


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area, since local variations may occur between test hole locations. The information is thus given in good faith and does not relieve the Contractor of his responsibility in terms of the General Conditions of Contract and the Specifications.

PS 4 ENVIRONMENTAL CONDITIONS OF SITE

Environment

For the purposes of this Specification, all Works shall be regarded as marine environments with some industrial pollution. The environment is damp with high prevailing winds also carry significant quantities of moisture.

This environment is very corrosive to ferrous metals and, where the use of such metals cannot be avoided, the metals must be adequately protected, such protection systems being designed for a life of at least 15 years.

PS 5 PHASING OF WORK

ACSA has budgeted funds to be available for this contract over the next two years.

The contract is expected to be awarded in February 2017. It should be noted that the construction of the pump station and the rising main is envisaged to start at the same time to allow the Client the earliest use of the facility as possible.

PS 6 CONSTRUCTION PROGRAMME, ESTIMATED MONTHLY CASH FLOW AND ADHERENCE THERETO

The provisions of this clause are supplementary to the provisions of Clause 5.6 and Clause 6.10 of the General Conditions of Contract.

The programme referred to in the General Conditions of Contract is to be presented in the form of a sloping bar chart incorporating all significant activities, and unless otherwise agreed to or required by the Engineer, shall be based on the programme submitted in terms of the Conditions of Tender and on Clause PS 5 and, in addition, shall show critical path activity and key dates for information to be provided by the Engineer. The Civil Contractor is required to handover (partial or give access to) the structures to the Mechanical / Electrical Contractor so that installation of equipment can commence. An estimated and itemised monthly cash flow for the value of permanent work to be executed under the contract shall accompany the programme. This cash flow shall be based on the programme, the unit rates tendered and on the tender quantities; but it shall exclude contingency items, price variation, provisional sums, prime cost items and materials on site which have not been incorporated in the Works. The Contractor shall submit with each payment claim an itemised statement of the actual cash flow achieved for the period covered by the payment claim. This statement shall be completed on the same basis as that stipulated in the third paragraph of this clause.

If, at any time during the Contract, the Contractor: a) Fails to adhere to the programme, or b) Fails to achieve the running total of the estimated monthly cash flow.


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The Contractor shall then submit a revised programme and method statement as to how he proposes to make up for lost time.

If, in the opinion of the Engineer, such revised programme will not make up the lost time, the Engineer shall have the right to request the Contractor to reorganise his work in a manner which will ensure an acceptable programme. Claims for additional payment to meet any costs incurred due to such reorganisation will not be accepted.

The approval by the Engineer of any programme, estimated monthly cash flow or actual monthly cash flow shall not in any way be construed as relieving the Contractor of his obligations in terms of this Clause or in terms of the Contract as a whole. The Contractor's programme and method statement will not be accepted as the basis for claims for additional compensation without due reference to all relevant associated factors.

PS 7 ATTENDANCE ON OTHER CONTRACTORS

The Contractor is responsible for all the work indicated on the drawings and/or specified and/or listed in the Schedule of Quantities. For all the work to be carried out by sub-contractors, the Contractor will be responsible for overall liaison with the sub-contractor, for attendance on and making good.

PS 8 DOCUMENTS AND DRAWINGS

One copy of the contract document will be made available free of charge to the Contractor at the award of the contract.

The drawings listed in the Schedule of Drawings and included in the tender documents are included for tendering purposes only and may be subject to modifications and additions before construction work commences.

Details of certain mechanical equipment designed by the Contractor’s Mechanical Engineer which will have an influence on the design of certain components of the Works to be constructed under this contract will not be available until some time after the award. A complete set of drawings will therefore not be available to issue for construction at the commencement of the Contract. The Contractor will factor this into his programme as no Claim for the delay will be entertained.

Drawings will be issued as necessary to the Contractor by the Engineer from time to time during progress of the Works. The Contractor shall timeously notify the Engineer of the order in which drawings and details are required.

The Contractor will on request be supplied with 3 paper prints of each of the drawings he requires. These prints will be issued free of charge.

Any information in the possession of the Contractor which is necessary for the Engineer to complete his "Record" drawings must be submitted to the Engineer before he will issue a Completion Certificate.

Only figured dimensions shall be used and Drawings are not to be scaled unless instructed by the Engineer who will supply any figured dimensions which may have been omitted from the drawings. The tender is to note the requirement of Operations and Maintenance manuals (O&M) as described in the Standard Mechanical Specification.


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PS 9 DELAYS DUE TO NON-SUPPLY OF MATERIALS, USE OF LOCALLY

MANUFACTURED MATERIALS AND IMPORTED MATERIALS

The Contractor shall ensure that the works is not delayed, due to lack of materials on the site of the Works, by placing orders with suppliers for materials required under the Contract as soon as possible after acceptance of his tender.

It is incumbent on the Contractor to ensure that no imported materials or products are used except where suitable South African manufactured materials or products are unobtainable. Where imported materials and products are to be used, Tenderers must ensure that the necessary import permits will be granted by the Department of Trade, Industry and Tourism. All costs relating to the imported materials and products are to be included in the tender prices and no claims for additional payment or extensions of time in relation to subsequent non-availability, currency fluctuations or the like will be considered or granted. In addition, spares availability on imported materials and products will be confirmed by the Tenderer.

PS 10 SITE FACILITIES AND CONTRACTORS CAMP/DEPOT PS 10.1 Potable Water Supply

Potable water supply is available on site. An application form is included under C3.6: Annexes which the Contractor will complete and submit to ACSA’s M&E Department. Where any illegal connections have been found to be done by the Contractor or his Sub Contractors, a penalty of R10 000.00 will be applied and deducted off the Contractor’s Payment Certificate. The Contractor will be responsible for metering his water usage. The metered volume will be provided to ACSA and the Engineer in an approved format and the Contractor will be billed on a monthly basis at CoCT water rates. This shall not relieve the Contractor of his responsibility for sourcing and storage of water of suitable quality for potable and construction purposes, for the duration of the contract should there be no water available on site for a period of time. All costs related thereto will be for the Contractor’s account. The Contractor will be responsible, for the construction of all temporary pipelines, pipework, storage facilities (to balance supply with demand), controls and appurtenant work necessary to convey water to his camp/depot and to other areas of the site where water is required for construction and other purposes.

On completion of the Contract, the Contractor shall remove all temporary facilities and reinstate all surfaces to their original standard.

PS 10.2 Construction Water

Only water complying with the quality requirements of SANS 10100-2: 1992 as amended shall be used for concrete, screeds, mortar and plaster for brickwork.

PS 10.3 Power Supply

Power supply is available for use on site. An application form is included under C3.6:

Annexes which the Contractor will complete and submit to ACSA’s M&E Department. The Contractor will be required to discuss the power availability with the Electrical Department within the M&E Department who in turn will advise the connection point and the capacity available. Where any illegal connections have been found to be done by the Contractor or his Sub Contractors, a penalty of R10 000.00 will be applied and deducted off the Contractor’s Payment Certificate.


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This shall not relieve the Contractor of his responsibility for provision of power for construction purposes, for the duration of the contract should there be no power available on site for a period of time. All costs related thereto will be for the Contractor’s account. The Contractor will be responsible for metering his electricity usage. The metered units will be provided to ACSA and the Engineer in an approved format and the Contractor will be billed on a monthly basis at Eskom unit rates.

The Contractor will be responsible for all costs entailed in providing the necessary cabling from the supply point. The installation shall be made by a certified electrician, and, on completion of the Contract, the Contractor will be responsible for removal of the installation and reinstatement of all surfaces, etc.

PS 10.4 Telecommunications

A connection will have to be obtained from ACSA’s IT Department: Contact Person: Patrick Aaron 021 935 3741 [email protected] All costs associated and related thereto will be for the Contractor’s account.

PS 10.5 Measurement and Payment

No specific payment will be made for the work etc. covered by this clause, the tendered rates in the relevant preliminary and general items being deemed to cover the cost thereof.

PS 11 CONTRACTORS CAMP/DEPOT AND OTHER FACILITIES PS 11.1 General

The Contractor, with ACSA and the Engineer, will plan and position where the camp site will be located in order that it does not clash with planned construction or the day to day operation of the Airport.

The layout of the camp shall be approved by the Engineer and the camp shall be suitably fenced. But for two watchmen the Contractor may not house any other of his employees in the camp's area or on the Site.

The Contractor shall maintain the Site in a clean, orderly and sanitary condition and shall take all the necessary steps and precautions to prevent the pollution of the surrounding area by his employees. These steps and precautions shall be to the satisfaction of ACSA, the Engineer and Medical Officer of Health. Where the Contractor or his Sub-Contractors fails to comply, a penalty of R1500/day will be applied until such time the Site and/or surrounding areas polluted by his employees or sub-contractors is returned to a clean, orderly and sanitary condition. The sum of which will be deducted off the Contractor’s Payment Certificate.

On completion of the Works, or when ordered by the Engineer, the Contractor shall remove all temporary accommodation, fencing, housing and latrines and restore the Site to a clean and sanitary condition to the satisfaction of ACSA and the Engineer.


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PS 11.2 Contractors Offices, Sheds etc

The Contractor shall provide offices for his own use and for the use of his representatives and all necessary shelter for workmen and sheds for the storage of tools, plant and materials. Sheds for the storage of cement and corrodible material must be waterproofed and weatherproofed with a raised floor of wood or concrete. Materials prone to UV degradation shall be stored under cover and in such a manner that they are not directly exposed to sunlight.

The Contractor will be required to obtain a separate telephone for his own use on the site and shall make all the necessary arrangements with Telkom.

PS 11.3 Latrines

The Contractor shall provide, maintain, move to positions required and finally remove, proper and adequate latrines for all the staff envisaged for the Contract. Latrines must be properly screened and secluded from public view and their use shall be strictly enforced. Temporary latrines must be sited so that they are within reasonable distance of the working place.

PS 11.4 Power and Water Reticulation of the Camp/Depot Area

Power distribution and water reticulation within the camp/depot shall be the responsibility of the Contractor. All electrical work shall be carried out by a licensed electrician.

PS 11.5 Measurement and Payment

The full costs entailed in providing the Contractor's facilities will be deemed to be covered under the prices tendered for the various preliminary and general items called up in the Bill of Quantities.

PS 12 ACCOMMODATION FOR CONTRACTOR'S EMPLOYEES

No housing is available for the Contractor's employees and the Contractor shall make his own arrangements to house his employees and transport them to the Site.

PS 13 FACILITIES REQUIRED BY THE ENGINEER

Facilities for the Engineer's staff in accordance with PSAB and the variations thereto in the PSAB clauses.

PS 14 FEATURES REQUIRING SPECIAL ATTENTION PS 14.1 Existing Services

The Contractor shall make himself acquainted with the site and inspect all areas for existing services before any scarifying or excavation is commenced. In addition, the Contractor is required to contact Electrical and Surface Maintenance department for an inspection for existing services before any excavation commences.

Although every effort has been made to ensure the accuracy of any underground services that may be shown on the drawings, ACSA takes no responsibility for the accuracy thereof, or for any omissions that may have been made. Under no circumstances is the Contractor to alter or in any way interfere with existing works or underground services unless authorised by the Engineer.

Where there is uncertainty as to the existence of, or the exact position or depth of any underground service, the Contractor shall carry out exploratory excavations using hand


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tools, in order to obtain the required information without causing damage. Exploratory excavations shall be carried out, refilled and reinstated in an approved manner as expeditiously as possible. This work will be measured and paid for as specified in variations to Standard Specification SABS 1200 A.

Where existing works are of such a nature that the Engineer may require them to be moved by the Contractor, the cost of such work will be paid for at scheduled rates.

The Contractor shall take adequate measures approved by the Engineer to protect and prevent damage to existing works and services and all damage caused to existing works and services shall be made good at the Contractor's cost.

Where the Contractor is responsible for the cost of repairs carried out by the Employer or an outside Authority to services damaged by the Contractor's operations, and where the Contractor fails to make payment to the Authority concerned for the cost of such repairs, the Employer reserves the right to make such payment directly to the relevant Authority and to recover the costs thereof from the Contractor by means of a deduction from the Contractor's monthly Payment Certificate.

ACSA reserves the right to prosecute under the terms of Local Government Ordinance No. 17 of 1939 and the Electricity Act No. 40 of 1958 where ACSA services have been willfully or negligently damaged.

Except only for exploratory excavations, for the location of existing services and deviations of such services where ordered by the Engineer, no specific payment will be made for any other work of any description connected with such services; the costs thereof being deemed to be included in the tendered rates.

PS 14.2 Protection to Public and Property: Watching, Lighting and Barricading

The construction site covers a large area of the airport which includes Shaded Parking Area 3 (P3) and the rising main pipeline route along freight road. The area of Works is considered as highly trafficked by both the general public and ACSA in both pedestrian and vehicle form. The Contractor shall fence or otherwise protect all parts of the works dangerous to the safety of the public or property and ensure that all roads adjacent to the site which may be affected by the Works are kept in a clean and safe condition for pedestrian and vehicular traffic.

All excavations are to be barricaded. Barricades shall consist of at least three 19mm diameter hemp ropes or 2,5mm wires, or more if required, stretched tightly between poles, standards, etc. securely planted in solid ground, well clear of the excavation and enclosing the spoil from the excavations.The poles, standards, etc. shall not be more than 15m apart, but if circumstances require it they shall be placed closer. The ropes or wires shall be stretched tight approximately 0,5m, 1,0m and 1,5m above the ground. Red flags shall be fixed to the barricades at distances not exceeding 15m along excavations for pipelines and structures, at the end of trenches, at manhole excavations, etc. All posts shall be painted white with bands 0,3m wide of red reflecting material painted around at 0,3m spacing. No specific payment will be made for watching, lighting and protecting the costs of which will be deemed to be included in the rates tendered for excavation. A portion of P3 will be fenced off to protect the public with hoarding as described under particular specification PH Fencing, to isolate the Works from the general public. The area along freight road will also have protection for pedestrians and vehicular traffic along the rising main route. The Contractor shall provide and maintain in a proper condition all necessary barricades, lights, warning signals and all direction signs necessary to enable pedestrians and traffic to follow the routes of diversion throughout the Works. Where required, the Contractor shall provide flagmen at all deviations and/or obstructions.


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The Contractor shall liaise with and co-operate with the ACSA Landside Department and other relevant Traffic Authorities wherever the Works affect the existing roads. The Contractor shall sign an indemnity clearing the Local Authority, as applicable, from all liabilities in respect of excavations and Works on or adjacent to trafficked roads. All protection, lighting and barricading measures shall be carried out to the satisfaction of the Engineer. All signs shall be in accordance with the South African Road Traffic Signs Manual.

PS 14.3 Access to Site

Generally, the Works constructed under this Contract falls on “landside” in P3 and along Freight Road.

PS 14.4 Construction in Confined Areas

It will be necessary for the Contractor to work within confined and restricted areas dependant on defined Works area limitations. The method of construction will be dependant on the Contractor’s construction plant.

Regardless, measurement and payment will be in accordance with the specified cross-sections and dimensions only, irrespective of the method used for achieving these cross-sections and dimensions. It is deemed that the rates tendered in the Pricing Schedule / Priced Bill / Schedule of Quantities include full compensation for all special equipment and construction methods and for all difficulties encountered when working in confined areas and narrow widths, and at or around obstructions.

Except where provided for in the project specifications and the Schedule of Quantities, no additional payment will be made nor will any claim for payment be considered for work done in such confined areas, despite indications to the contrary in the Standard Specifications. The omission of standard pay items from the Schedule of Quantities shall be taken to be deliberate and any additional cost incurred shall be included in the bulk rate.

PS 15 HOURS OF WORK

Authority to work on construction at times other than the Contractor's normal hours will be given only in special circumstances.

All operations must be planned and started, and the scope thereof limited with sufficient reserve plant provided, to enable such operations to be carried to completion in the normal working shift.

In the event of overtime being worked by the Contractor, all critical operations e.g. concreting, laying and jointing pipework etc, must be carried out during the period of normal working hours of the Engineer's representative.


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PS 16 SAFETY OF THE WORKMEN

The safe execution of the Works shall be of primary consideration. The entire works shall be carried out in conformity with all applicable statutory regulations and legislation, and local authority by-laws. In particular, but not exclusively, the work shall comply in all respects with the relevant requirements of the following Acts or Regulations where applicable to the respective portions of the work:

(a) The Occupational Health and Safety Act of 1993 as amended. (b) The Explosives Act (Act No. 26 of 1956 as amended) and the Regulations.

The relevant Regulations where applicable are to be regarded as part of this Specification defining the manner in which the work shall be done.

Copies of the Acts and Regulations are to be kept on the Works and must be readily available for reference.

PS 17 APPLICABLE STANDARDISED AND PARTICULAR SPECIFICATIONS

Although not bound into this document, the following latest editions of the SANS / SABS 1200 Standardised Specification shall form Section A2 of the Project Specification.

SANS 1200:A - GENERAL SANS 1200:AB - ENGINEER'S OFFICE SANS 1200:C - SITE CLEARANCE SANS 1200:D - EARTHWORKS SANS 1200:DB - EARTHWORKS (PIPE TRENCHES) SANS 1200:DK - GABIONS AND PITCHING

SANS 1200:DM - EARTHWORKS (ROADS, SUBGRADE) SANS 1200:G - CONCRETE (STRUCTURAL) SANS 1200:H - STRUCTURAL STEEL SANS 1200:HB - CLADDING AND SHEETING

SANS 1200:HC - CORROSION PROTECTION OF STRUCTURAL STEEL SANS 1200:L - MEDIUM PRESSURE PIPELINES SANS 1200:LB - BEDDING (PIPES) SANS 1200:LC - CABLE DUCTS SANS 1200:LD - SEWERS SANS 1200:LE - STORMWATER DRAINAGE SANS 1200:M - ROADS (GENERAL) SANS 1200:ME - SUBBASE SANS 1200:MF - BASE SANS 1200:MH - ASPHALT BASE AND SURFACING SANS 1200:MJ - SEGMENTED PAVING SANS 1200:MK - KERBING AND CHANNELLING SANS 1200:MM - ANCILLARY ROADWORKS The following Particular Specifications which shall form a part of the Contract are bound into Section A3 of the Project Specification : PA : BRICKWORK, BLOCKWORK AND PLASTERING PB : CARPENTRY, JOINERY, TIMBERWORKS AND CEILINGS PC : STEEL DOORS, WINDOWS, GLAZING AND FIRE

PROTECTION EQUIPMENT PD : PAINTING (OTHER THAN STRUCTURAL STEELWORK) PE : PIPELINE VALVES PG : GRASSING PH : FENCING PI : ELECTRICAL INSTALLATION


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PS 18 MEASUREMENT AND PAYMENT

Unless specifically stated to the contrary in the clause concerned, no specific payment will be made for the Contractor's compliance with the requirements of this part of the special provisions.


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SECTION A2: VARIATIONS TO STANDARDISED SPECIFICATIONS

PSA : GENERAL (Applicable to SANS 1200A-1986) PSA 2 INTERPRETATIONS PSA 2.1 Applicable edition of standards Add at the beginning of Subclause 2.2: "Unless a specific edition is specified (see the List of Applicable Specifications)" PSA 2.8 Items in Schedule of Quantities

In the fourth line of Subclause 2.8.1, after the word "specification", add: "or in the measurement and payment clause of the particular specification, or project specification".

PSA 3 MATERIALS

PSA 3.1 Quality of Materials

Add to the Sub-Clause:

No used or recycled material may be used in the Works unless expressly authorised by the Engineer. All materials to be provided under this Contract shall bear the mark of the South African Bureau of Standards wherever such materials are the subject of an SABS standard.

Materials bearing the SABS or BS mark will not be subjected to tests to determine whether they comply with the relevant specifications. The Engineer may in his discretion require any material not bearing such mark to be tested in accordance with the relevant specifications; should he do so the Contractor shall arrange for such tests to be carried out at the Contractor's cost by the South African Bureau of Standards or other approved body. Should the tests prove that any material complies with the Specifications the Contractor will be reimbursed the value of the testing body's account for carrying out the tests required by the Engineer.

PSA 3.3 Delay Due to Supply of Materials

Add the following new sub-clause:

The Contractor shall ensure that the work is not delayed, due to the lack of materials on the site of the works, by placing orders with suppliers for the materials required under this contract timeously. The Contractor shall, by producing copies of written orders or written enquiries for supplies, prove to the satisfaction of the Engineer that any delay occasioned by non-availability of materials has been caused by the inability of suppliers to supply and not by his own lack of timely ordering or lack of exhaustive enquiry for supplies, before any extensions of the contract time will be allowed due to such delays.


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PSA 4 PLANT

PSA 4.1 Contractor's Offices

Medical facilities and safety equipment

The suitable first aid services in terms of Subclause 4.2 of SABS 1200 A shall include, inter alia, a First Aid cabinet fully equipped and maintained with at least the minimum contents as listed in the Annexure (Regulation 3) to the General Safety Regulations of the Occupational Health and Safety Act, 1993 (Act 85 of 1993), to deal with accidents and ailments which are likely to occur during the construction period.

The Contractor shall provide personal safety equipment and facilities as required by Regulation 2 of the General Safety Regulations of the Occupational Health and Safety Act, 1993 (Act 85 of 1993) – reference is to be made to the Health and Safety specifications forming part of this Contract Document found in Section E: OHS Specification.

Latrine facilities

The Contractor shall make all the necessary arrangements with the relevant local authority or an approved private contractor for the disposal of the contents of the toilets on a regular basis.

PSA 5 CONSTRUCTION

PSA 5.1.1 Setting out of the Works

Before commencing any construction, the Contractor shall check the relative positions and levels of all reference pegs, bench marks and line pegs and inform the Engineer of any discrepancy.

The Contractor shall advise the Engineer of any conflict between the position of any part of the Works and an existing feature.

PSA 5.4 Existing Services

Action by Contractor

The Contractor shall not commence work in any area until proper arrangements have been made for supervision of any work by the relevant authority in connection with services that may exist.

PSA 5.5 Dealing with Water on the Works Add the following to this clause:

For the purposes of this contract the term "water" shall also include for discharge from broken water pipes, flow from sewerage installations and broken sewerage pipes, whether caused by the Contractor or not, as well as for ground water, stormwater, etc.

PSA 5.7 Safety

Add to the Sub-Clause :

All work and particularly work carried out in the proximity of buildings, bridges, tanks or other structures shall be carried out in compliance with the regulations framed under the Occupational Health and Safety Act, No 85 of 1993 and the Minerals Act, (Act 50 of 1991) (including shoring where necessary) to ensure the safety of structures that are at risk.


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The Contractor shall make available for the duration of the contract safety helmets, safety boots, gum boots, reflective vest for all employees with the name of the Contractor company and any other necessary safety equipment for sole use by the Engineer and his representative(s) – reference is to be made to the Health and Safety specification found in Section E: OHS Specification, forming part of this Contract Document.

PSA 5.9 Security

PSA 5.9.1 Security of Contractor's Plant and Personnel

The Tenderer shall note that, notwithstanding the insurances effected by the Employer, the Contractor shall be responsible for the effecting of safety and security of plant and personnel on and around the site of the works, and that no claims in this regard will be entertained by the Employer. The Contractor's attention is drawn to the fact that the work is to be carried out in an area where there might be a high incidence of criminal activity. The sum entered by the Contractor in the Schedule of Quantities for effecting of safety and security of plant and personnel on and around the site of the works shall be deemed to include full compensation for all the measures necessary to effect the safety and security.

PSA 6 TOLERANCES

PSA 6.2 Degrees of Accuracy


Degree of Accuracy I shall be applicable to the following parts of the Works unless stated to the contrary elsewhere;

weirs, measuring flumes

Degree of Accuracy III shall be applicable to the following parts of the Works unless stated to the contrary elsewhere:

building foundations, pipe encasements. PSA 8 MEASUREMENT AND PAYMENT

PSA 8.3 Scheduled fixed-charge and value-related items

PSA 8.3.2.1 Facilities for Engineer

Delete sub-items (a), (b) and (c) and substitute:

a) Office Furniture Unit : Sum

b) Car ports (number stated) Unit : Sum

c) Cellular telephones (number stated) Unit : Sum

d) Combination photocopying, fax and telephone machine Unit : Sum e) Laptop and Printer Unit : Sum

f) Nameboards (Number stated) Unit : Sum

g) Survey Unit : Sum


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Add the following new item:

PSA 8.3.5 Security of Contractor's Plant & Personnel Unit : Sum

The tendered sum shall include full compensation for all costs incurred in effecting the safety and security of plant and personnel on site as described in Clause PSA 5.9.1.

PSA 8.4 Scheduled Time-Related Items

PSA 8.4.2.1 Facilities for the Engineer

Delete sub-items (a), (b), (c) and (d) and substitute:

a) Office Furniture Unit : Sum

b) Car ports (number stated) Unit : Sum

c) Cellular telephones (number stated) Unit : Sum

d) Combination photocopying, fax and telephone machine Unit : Sum

e) Laptop and Printer Unit : Sum

f) Nameboards (number stated) Unit : Sum

g) Survey Assistants and survey materials Unit : Sum

h) LDV Unit : Sum

Add the following new item: PSA 8.4.6 Security of Contractor's Plant and Personnel Unit : Sum

The tendered sum shall include full compensation for all costs incurred in effecting the safety and security of plant and personnel on site as described in Clause PSA 5.9.1.

PSA 8.8.2 Accommodation of Traffic….……………………………………………………......Unit : Sum

The sum stated shall cover the cost accommodating traffic (diverting, redirection, signage, flagmen, lighting, etc) wherever the Works affects existing/new roadways. The sum shall also include maintaining roads and surrounding area in a neat and acceptable degree approved by ACSA and the Engineer. The rate shall include all plant and labour required. The sum will cover the entire project duration and will be paid in monthly instalments and not in a lump sum.


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PSAB: ENGINEER'S OFFICE

(Applicable to SABS 1200AB-1986)

PSAB 1 SCOPE

PSAB 1.1 Delete this sub-clause and substitute:

This Specification covers the requirements for office, laboratory, store room, locker room, car ports, laboratory equipment and the minimum associated facilities for the use of the Engineer on the site.

THE CONTRACTOR SHALL NOTE THAT THESE ARE GENERAL REQUIREMENTS AND THAT ONLY THOSE ITEMS THAT ARE SPECIFICALLY ITEMISED IN THE SCHEDULE OF QUANTITIES ARE REQUIRED ON THIS CONTRACT.

When the Contract is awarded, the Engineer shall give the Contractor full details in writing regarding the number, type and layout of all the units required, as well as details of fittings and equipment required. The Contractor shall not order any buildings, material, equipment or fittings on the basis of what is specified or scheduled without written confirmation from the Engineer. The offices, laboratory, store room, locker room and car ports shall, unless otherwise agreed or instructed, be erected in close proximity to the Contractor's offices and laboratory and the entire area shall be fenced with security fencing and provided with a gate. The Contractor shall take all reasonable precautions to prevent unauthorised entry to the offices and laboratories and to ensure the general security of the offices.

PSAB 2 INTERPRETATIONS

PSAB 2.3 Definitions

Add the following definitions:

Laboratory: A laboratory constructed on site, or a mobile, semi-mobile or prefabricated unit.

Store Room: A store room constructed on site, or a mobile, semi-mobile or prefabricated unit.

Locker Room: A locker room constructed on site, or a mobile, semi-mobile or prefabricated unit.

Car Port: A roofed shelter constructed on site for one or more cars as specified or scheduled.

PSAB 3 MATERIALS

PSAB 3.2 Office Building(s)

Delete this sub-clause entirely and retitle the sub-clause "FACILITIES FOR

ENGINEER".

Add the following sub-clauses:

PSAB 3.2.1 Office Buildings

The Contractor shall provide, furnish and equip one or more offices (as scheduled) for the use of the Engineer.


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Buildings for offices shall be constructed of timber, asbestos or other approved materials. The buildings shall have double walls filled with insulating material and lined on the inside with timber or other approved material. Ceilings shall be provided and offices shall have timber or concrete floors with edge to edge foam-backed needle punch carpeting in either case. Office buildings shall be painted with an approved paint after erection and the paintwork shall be maintained in good repair throughout the contract period. Each door shall be provided with a lock (external doors having at least three levers mechanisms) and two keys. The siting of all offices shall be to the Engineer's satisfaction and shall be decided upon in consultation with him and confirmed in writing before erection. All accommodation shall include the provision of a 220/250 volt A.C. electrical supply, access roads where required and toilet facilities. The latter shall include a fresh clean potable water supply and sewerage, including septic tanks, or main drainage connections. All the foregoing will be considered as part and parcel of the accommodation provided and will not be paid for separately.

All accommodation shall meet with the approval of the Engineer.

Furniture and equipment:

Each office shall be equipped with the following: i) Office desk with a surface area of at least 1,5 m2 and having at least 3 drawers,

one of which can be locked. ii) General purpose steel cabinet with doors, lock and two keys with at least 1,5 m2

shelf area and a volume of 0,7 m3. iii) Two office chairs. iv) Sufficient racks and hangers for hanging contract drawings. The hangers shall be

of the "Barhold" type, with one hanger to five drawings. v) Double 80 watt fluorescent light fittings complete with ballast and tubes (three per

Type 1 office, and one per Type 2 office). vi) Drawing table with a smooth flat top having an area of at least 3m2 vii) One draughtsman's stool fitted with a padded seat with adjustable seat height. viii) Windows shall be fitted with Venetian or opaque roller blinds. ix) Electric space heater with enclosed elements of not less than 1,5 kW.

In addition to the above the office shall be equipped with the following:

x) Conference table large enough to accommodate twelve people and have a surface area of at least 4 m2.

xi) Ten office chairs. xii) Steel filing cabinet fitted with four drawers on runners. Cabinet shall be fitted with

locks and shall be 1300mm high, 460mm wide and 600mm from front to back. xiii) One 150l refrigerator xiv) Survey equipment as listed below:


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One theodolite capable of reading to twenty seconds of arc plus tripod One automatic level and tripod One levelling staff (4 m long, 1 cm gradations) Two tacheometric staves ;(5 m long, 1 cm chess board pattern) Two staff angle bubbles One metal change-point for levelling One separate plumb-bob One spirit level (one metre long) Six steel-tipped ranging rods each 2,5 m long Two canvas carry-bags One 100 m stilon tape One 25 m stilon tape One 5 m steel tape One hammer (2 kg) One electronic detector for locating underground services Steel pegs in sufficient quantities as required

The tacheometer may be shared by arrangement between the Contractor and the Engineer, but the remaining instruments shall be provided for the exclusive use of the Engineer. The Contractor shall keep the equipment continuously insured against any loss, damage, or breakage and he shall indemnify the Engineer and Employer against any claims in this regard. On completion of the Works, ownership of the furnishings and equipment shall revert to the Contractor who shall remove them from the Site.

PSAB 3.2.2 Car Ports

The Contractor shall provide car ports adjacent to the offices as directed by the Engineer. Car ports shall be so constructed and positioned that the vehicles parked under them will at all times be protected against the direct rays of the sun. The car ports shall be at least 20 m2 in area and the floors shall consist of a layer of broken stone to alleviate dusty and muddy conditions. The Contractor shall maintain the car ports in good condition throughout the contract period. Upon completion of the whole of the Works, the ownership of the car ports shall revert to the Contractor who shall remove them from the site.

PSAB 3.2.3 Air-Conditioning Units

Where required by the Engineer, the Contractor shall provide, install and maintain air-conditioning units. The air-conditioning unit shall be an electricity operated compressor type with closed circuit, and not an evaporation type. The capacity of the air-conditioning units shall be at least 2,2 kW each. On completion of the Works, ownership of the air-conditioning units shall revert to the Contractor who shall remove them from the Site.

PSAB 3.2.4 Special Testing of Materials

Except when specifically directed by the Engineer, the Contractor shall be responsible for the execution of all tests required for quality and compaction control, and shall provide all necessary staff and equipment to the satisfaction of the Engineer for this


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purpose on the site of the works. No payment will be made for tests carried out by the Contractor except for specific tests ordered by the Engineer. Over and above the normal check tests carried out by the Engineer on site the Engineer may from time to time order the Contractor to arrange special check tests to be carried out by an approved independent laboratory. Where such testing is contemplated in advance, allowance shall be made for the cost thereof by the inclusion of a Provisional Sum.

PSAB 3.2.5 Photocopying Machine

The Contractor shall arrange for the provision, installation and maintenance of an approved photocopying machine, capable of making up to A3-sized copies, within the Engineer's office. The price shall include for all accessories such as paper, etc. for making a maximum of 1 000 A4-sized copies per month. Upon completion of the whole of the works, the ownership of the photocopying machine shall revert to the Contractor who shall remove it from the site.

PSAB 3.2.6 Telefax Machine

The Contractor shall arrange for the provision, installation and maintenance of an approved telefax machine in the Engineer's office. The price shall include for all accessories such as paper, etc. Upon completion of the whole of the works, the ownership of the telefax machine shall revert to the Contractor who shall remove it from the site.

PSAB 3.2.14 Laptop and Printer

The Contractor shall arrange for the provision, installation, maintenance of an approved, new laptop computer and printer with the necessary software and auxiliary equipment. The price shall include all the accessories such as paper, cartridges etc. the laptop shall have a minimum specification of: i) Dual core processor with a speed of CORE i5 ii) Screen 15 inch TFT iii) Hard drive 500 GB iv) DVD/CD writer/reader v) Ram 8 GB vi) Modem and network card vii) 4 No USB ports viii) 1 No flashdrive, 1GB ix) Windows 7 Professional operating system x) Office 2010 xi) Autocad 2013 xii) Carry case

The printer shall have a minimum specification of:

xiii) Printing both A3 and A4 sizes. xiv) Colour or black printing xv) USB cable for connection to laptop xvi) Thermal inkjet printing xvii) Duty cycle of 4 000 pages per month xviii) DVDs /CDs as required


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PSAB 4 PLANT

PSAB 4.1 Telephone

Add the following: "The Contractor shall arrange for the installation in the office of the Engineer a telephone on a private line and shall be responsible for the installation costs, rental and the cost of local calls. As a temporary arrangement, the Contractor shall, from the time the site is handed over until the telephone has been installed, provide a cell phone for the use of the Engineer.

PSAB 4.3 Provision of Vehicle(s)

Where so specified or scheduled, the Contractor must provide within two (2) weeks of the Date of Commencement the following vehicle(s), in good condition, for the exclusive use of the Engineer and Client. The Contractor must provide all fuel and lubricants, service and maintenance of the vehicles in accordance with the manufacturer's specifications. He must also comprehensively insure the vehicles while being used by the Engineer and Client or their staff. The LDV shall remain the property of the Contractor and shall be removed from site on completion of the works.

PSAB 5 CONSTRUCTION

PSAB 5.4 Telephone

Delete the last sentence of this sub-clause and substitute:

"The cost of installation of the telephone, telephone rental and the cost of the Engineer's local calls, as well as all the costs associated with the provision, licensing, insurance, etc. of the portable telephone, shall be deemed to be covered by the Contractor's rates for the provision of the telephone service."

PSAB 5.5 Survey Assistants

Delete this Sub-clause and substitute: "The Contractor shall make available to the Engineer on a part-time basis a cleaner/office assistant and in addition, when required, a suitably trained and approved survey assistant and labourers necessary to assist the Engineer in carrying out survey work, setting out and measurement of the works. The Contractor shall supply all pegs and concrete necessary for the setting out of the work. The wages of the cleaner/office assistant, survey assistant and labourers shall be paid by the Contractor."

PSAB 8 MEASUREMENT AND PAYMENT

PSAB 8.1 Scheduled Items

Add to the Sub-Clause: The Tenderer is to include, under the Time Related Charges, a Prime Cost Sum calculated at a rate of R500.00 per week, for a period of time equal to the tendered Time for Completion of the Contract (see Appendix) to cover the cost of the Engineer's telephone calls and the related telephone rental and contractors costs and profits.


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PSC : SITE CLEARANCE

(Applicable SABS 1200 C - 1980 As Amended 1982) PSC 8 MEASUREMENT AND PAYMENT

PSC 8.2 Scheduled Items

PSC 8.2.10 Amend the description of 8.2.10 to read:

Remove topsoil to depth ordered by the Engineer and stockpile and maintain.

PSC 8.2.12 Remove and stockpile existing brick and block pavers on site………….….... Unit : m2

The rate shall cover the cost of carefully removing existing brick pavers for reuse from areas as indicated on the drawings or as directed by the engineer for stockpile on site. Brick and pavers which are damaged in the removal process will be separated and stockpiled separately on site.

PSC 8.2.13 Lift and remove existing precast kerbs, channels and edging and dispose off site ...Unit : m

The rate shall cover the cost of lifting and removing existing precast kerbs, channels, and edging as indicated on the drawings or as directed by the engineer. The rate shall include loading, transporting and disposing of such material at a dump site and include any charges for the use of that dump site.

PSC 8.2.14 Break up existing concrete aprons and other and concrete structures and dispose off site..

……………………………………………………………………………………….... Unit : m3

The rate shall cover the cost of breaking up existing concrete aprons and structures by means of mechanical equipment and or plant to a suitable size for loading and disposing off site. The rate shall include the cost of all mechanical equipment or plant required for the operation to demolish and break up the concrete. The rate shall further include the cost of loading, transporting and disposing of the material at a dump site and include any charges for the use of that dump site.

PSC 8.2.15 Break up and strip existing bituminous surfaced areas to a depth of 50mm and dispose of off site…………….. ……………………………………………………........Unit : m2

The rate shall cover the cost of breaking up existing bituminous surfaced areas by means of either mechanical equipment or plant for disposing off site. The rate shall include the cost of all mechanical equipment or plant required for the operation to break up and strip the bituminous material. The rate shall further include the cost of loading, transporting and disposing of the material at a dump site, which accepts this type of material bituminous material and include any charges for the use of that dump site.

PSC 8.2.16 Carefully remove, store and reinstall existing carports after completion of construction……….. …………………………………………………………......Unit : No.

The rate shall cover the cost of breaking up existing bituminous surfaced areas and concrete by means of either mechanical equipment or plant for disposing off site. The rate shall include all plant and labour for dismantling, loading, transporting, double handling, etc of steel work and shade cloth for later reinstallation. The existing carport covers a 2 bay long (approximately 10m) by 12 bays wide (approximately 30m) The rate shall further include the cost of loading, transporting and disposing of the material


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at a dump site, which accepts bituminous and concrete material and include any charges for the use of that dump site.

PSC 8.2.17 Amend existing carports to suit new pump station boundary fence line…………………….…………………………………………………………......Unit : No.

The rate shall cover the cost of cutting, shortening steel sections, new connection points, etc. The rate shall include all plant and labour for re-erection, loading, transporting, double handling, etc of steel work and amending shade cloth to suit new structure.


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PSD : EARTHWORKS

(Applicable to SABS 1200 D - 1982) PSD 1 SCOPE PSD 1.1 Delete the words "short trenches" in the second line.

Add the following at the end of Clause 1: "Unless otherwise specified all trenching required for this Contract is called-up under Standardised Specification SABS 1200:DB, and the variations/additions thereto in Portion 3 of the Project Specification".

PSD 2.3 Definitions

Add the following definitions: The term "embankment" and the term "fill" shall be synonymous The term "dispose" and the term "spoil" shall be synonymous. Topsoil: The top layer of soil to a depth of 150 mm including the vegetal matter in the soil and above the ground.

PSD 3 MATERIALS

PSD 3.1 Classification for Excavation Purposes

PSD 3.1.1 Method of Classifying

After the first paragraph add: Inspection of the material for any classification other than soft excavation shall be undertaken by the Engineer prior to any excavation. Levels of the occurrence of intermediate and hard rock excavation shall be measured and agreed, recorded and signed by both the Engineer and the Contractor before commencement of intermediate or hard rock excavation.

PSD 3.1.2 Classes of Excavation

Add the following:

Notwithstanding the provisions of this sub-clause of anything to the contrary in these Specifications or the Schedule of Quantities, Boulder Excavation Class A and Class B shall be classified as Intermediate Material, with the proviso that boulders requiring drilling and blasting in order to be removed or loaded as specified in Sub-Clauses 3.1.2(a)(1) and (2) will be measured separately as Hard Rock Excavation.

PSD 3.3.2 Backfilling and Embankments Delete this sub-clause and replace with the following: "Sufficient material arising from excavations for structures, terraces, foundations etc. and which is suitable for backfilling round and beneath structures, footings etc,


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embankments and the like, shall be stockpiled in the vicinity of its final destination or point of use. The Contractor shall ensure that the site(s) selected for such stockpiling are well clear of all works to be constructed and that such siting will not hamper construction activities. All surplus material suitable for backfilling and embankments and all material which the Engineer considers to be unsuitable for backfilling and embankments shall be disposed of as directed by the engineer. Tenderers shall therefore allow in their prices for all temporary stockpiling and double handling arising from this requirement.

The Contractor shall be entirely responsible for deciding whether or not excavated material suitable for backfilling is surplus to that required for the full construction and reinstatement of the Works. Should it become necessary to reclaim material previously disposed of or to import additional material from spoil dumps as a result of the Contractor's failure to comply with the above requirement for any reason whatever, then the Contractor shall bear all additional costs connected with such reclamation and/or importation.

PSD 5 CONSTRUCTION

PSD 5.1 Precautions

PSD 5.1.1 Safety

PSD 5.1.1.1 Barricading and lighting

Delete the Sub-Clause and substitute: Without diminishing any obligation which the Contractor may have in terms of any Act, Ordinance or other legislation, the Contractor shall ensure that all excavations which are accessible to the public or which are adjacent to a public road or thoroughfare, or by which the safety of persons may be endangered are protected as set out in Clause 13 of the General Safety Regulations of the Occupational Health and Safety Act, 1993 and that watchmen are employed to ensure that barricades, barriers and lights are effective at all times. Trench excavations shall be protected by means of at least three horizontal strands of 2,50 mm diameter galvanised wire. Double sided "red/white" chevron tapes shall be tied to the wires in a zigzag vertical pattern at maximum spacing of 1 m. The wires shall be stretched tightly between supports along both sides and ends of the excavation. The supports shall consist of poles or iron standards securely planted in solid ground at not more than 5 m centres so as to enclose the spoil and the excavations. Bridges for vehicles and / or pedestrians shall be provided along the route of the work as and where may be considered necessary by the Engineer. They shall consist of a number of suitably sized steel plates laid across open excavated trenches. They shall be protected on each side by a stout two rail timber fence, at least 1 m high, consisting of 150 mm x 75 mm timber verticals set firmly into the ground, with 75 mm x 50 mm rails securely fastened to them. At least 4 lamps or reflective markers must be provided at each crossing. Where construction is in, or across, public roads the barricades or barriers and temporary road signs shall be erected so as to comply with the requirements set out in Road Note 13 read in conjunction with the SA Road Traffic Signs Manual.

PSD 5.1.1.2 Safeguarding of excavations

Delete the first three lines and substitute the following:


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The Contractor or his agent or representative appointed in writing shall be deemed to be and shall be both the "employer" and "a person who is competent to pronounce on the safety" of all bracing and shoring as set out in Regulation 13 (Demolition and Excavation) of the General Safety Regulations of the Occupational Health and Safety Act, No 85 of 1993.

PSD 5 1.1.3 Explosives

The following shall be added to the end of this sub-clause: "No specific allowance for overbreak will be made for this Contract, and any overbreak beneath foundations and all structures shall be made good with Class 10/19 concrete at the Contractor's expense".

PSD 5.1.2 Existing services and other works

The provisions of this sub clause shall be deleted and replaced with the following: "The Contractor shall at all times exercise the utmost care that existing services and permanent or temporary works constructed by others are not disturbed, disrupted or damaged in any way by his activities. Although the drawings may show the approximate position of existing services the Employer and/or the Engineer takes no responsibility for the accuracy thereof nor any omission that may have been made; and it is stressed that no claims for additional payment and/or extensions of time will be considered or granted for crossing or working alongside services not shown on the drawings or services which are not in the positions indicated on the drawings. The Contractor shall exercise the greatest care when working in the vicinity of such services and shall take all necessary steps to protect any existing works whatsoever against damage which may arise as a result of his operations on site. The Contractor shall bear the cost of the repair of damage to any service the possible existence of which could reasonably have been ascertained by him in good time. Where the Contractor is responsible for the cost of repairs carried out by the Employer or an outside Authority to services damaged by the Contractor's operations, and where the Contractor fails to make payment to the Authority concerned for the cost of such repairs, the Employer reserves the right to make such payment directly to the relevant Authority and to recover the costs thereof from the Contractor by means of a deduction from the Contractor's monthly Payment Certificate. The Contractor shall adequately support in position and protect from damage any work which may become exposed by his excavation or rendered liable to damage by reason of the work in hand.

No specific payment will be made for the temporary protection of all existing services and works which will, or may be affected by this Contract during its execution, the cost of such protection being deemed to be covered by the rates tendered for other items of work.

The Contractor shall allow in his rates (for other items of work) for all work, whether of a temporary or permanent nature (including exposure), entailed in protecting these current existing services and works against damage or disruption resulting from his activities.

If, during the tenure of this Contract any permanent work, temporary work or construction activity by others on site of the works or on the construction roads, borrow pits, spoil areas and the like used by the Contractor, is likely to seriously disrupt or otherwise adversely affect the Contract, the Contractor shall immediately


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notify the Engineer of the facts in writing. It is stressed that no claims resulting from any delays by the Contractor in providing such notice will be considered or paid."

PSD 5.1.3 Stormwater and groundwater

The second paragraph of sub-clause 5.1.3 shall be deleted and replaced with the following: "The Contractor shall take every precaution to prevent water from any source entering excavations. The Engineer may order additional precautions to be taken where he is not satisfied with the Contractor's arrangements. Any water, including seepage, entering excavations shall be removed immediately by the Contractor". Where the bottoms or sides of excavations in which bases are to be cast deteriorates or are softened on account of negligence on the part of the Contractor in allowing storm or other water to enter the excavations, the softened material shall be removed and replaced with foundation fill as described in Sub-clause PSD 5.2.2.1 as directed by the Engineer, at the Contractor's expense.

PSD 5.2.1.3 Stripping or removal of overburden

The following shall be added to the end of sub clause 5.2.1.3: "The removal of overburden (after stripping of topsoil has been completed) will be scheduled under the appropriate bulk excavation item."

PSD 5.2.1.4 Erosion Control

Add new Clause: "During construction, the Contractor shall protect all areas susceptible to erosion by installing such drainage works or other measures as may be necessary to prevent the concentration of surface water and scouring of slopes, banks and other areas. All erosion, such as runnels, channels or sheet erosion that develops during the Construction Period and Defects Liability Period shall be backfilled and consolidated and the areas restored to their proper condition at the Contractor's expense. The Contractor shall not allow erosion to develop on a large scale before effecting repairs and all erosion damage shall be repaired to the approval of the Engineer. All topsoil or other material accumulated in side drains shall be removed at the same time. Topsoil washed away shall be replaced.

PSD 5.2.2.1 Excavations for general earthworks and structures

The following shall be added after (a): "Any extraordinary feature such as fossils, unexpected ground water, or an unexpected geological feature shall be reported to the Engineer before it is removed or covered." The following shall be added after (b): "In the event of surfaces to the underside of structure foundations being over-excavated below the authorised horizontal and/or sloping surfaces the Contractor shall make good such over-excavation at his own cost with compacted material complying with the requirements stipulated in sub clause 3.2.2, compacted cement or lime stabilised material, or Class 10/19 concrete as directed by the Engineer; the decision as to which material is to be used and the degree of compaction and stabilisation (where applicable) shall rest solely with the Engineer". The following shall be added after (c): "Working space for structures will be defined by pay lines shown on the Drawings. Where no such pay lines are shown on the Drawings and form work is scheduled to the


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outer concrete surfaces of such structures which are to be in contact with soil surfaces below finished ground level, the working space allowed or scheduled will be 600 mm beyond the nett foundation plan outline of the structure concerned. Where structures have protruding footings or nibs clause PSD 8.1(d) will apply Working space for minor structures such as concrete valve chambers, concrete channels and the like for which form work to the outer faces of concrete to be in contact with soil surfaces below ground level is required and is scheduled will be 600 mm beyond the nett foundation plan of the structure concerned".

PSD 5.2.3.1 Embankments

In the fourteenth line delete "600 mm" and substitute "500 mm". In the seventeenth line delete "300 mm" and substitute "200 mm".

PSD 5.2.3.2 Backfilling and compaction round and beneath structures

The following shall be added to sub-clause 5.2.3.2: c) Degree of compaction. Unless specifically called up in the Schedule of Quantities

or shown on the Drawings each layer shall be compacted in layers not exceeding 200 mm thick to at least 98% of modified AASHTO maximum density beneath structures and at least 95% modified AASHTO maximum density around and against structures.

PSD 5.2.4.1 Final grading

The following new paragraph shall be added to sub-clause 5.2.4.1 "All earthworks shall be neatly trimmed to the lines and levels shown on the Drawings or directed by the Engineer. The degree of finish for all slopes flatter than 1:4 shall be that normally attainable with a motor grader operated by an experienced operator. Slopes steeper than 1:4 shall be finished to a uniform neat appearance without any readily noticeable break, the quality of finish being that normally attainable by hand shovel operations".

PSD 5.2.4.2 Topsoiling

Delete "75 mm" in the fourth line and substitute "100 mm".

PSD 5.2.4.7 Final finishing and clearing up

After completion of construction, including kerbing, stormwater structures and bituminous surfacing, the site shall be cleaned of all loose stones, waste material, rubble and debris resulting from the operations of the Contractor. Drainage structures, culvert inlets and outlets, culvert barrels and open drains shall be cleared of debris, soil, silt and other material. The slopes of cuttings and fills, sidewalks, verges, medians and islands shall be trimmed to neat uniform slopes and the entire site left in a neat and workmanlike condition. All temporary deviations shall be ripped and levelled off with the original ground surface in such a way that soil erosion is prevented. Any bituminous surfacing on deviations shall be removed and disposed of as directed by the Engineer.

The Contractor shall take care not to damage existing works during finishing and clearing up operations. Any damage to roads, kerbing and channelling, drains, cut and fill slopes and services caused by Contractor's final finishing and clearing up operations shall be repaired by the Contractor at his own cost to the satisfaction of the Engineer.


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PSD 5.2.5 Transport for earthworks Sub clause 5.2.5.1 (b) shall be deleted and the following substituted therefore:

"(b) Surplus suitable excavated material shall be first used to backfill the pump station.

No specific payment will be made for the handling, hauling, disposal, spreading, contouring, etc. of surplus excavated material under this Contract, the cost thereof being deemed to be included in the rates tendered for excavation."

PSD 5.2.5.1 Freehaul Delete the last sentence and substitute: In the event of the information listed in (b) above being omitted from the Contract documents, and provided that no other freehaul distance has been specified elsewhere in the Contract documents, the freehaul distance within which the Contractor will be required to move material without separate compensation shall be 2,5 km.

PSD 5.3 Construction

Add the following new sub clause 5.3:

5.3 Soilcrete

Where ordered by the Engineer or where shown on the drawings, foundation fill under structures or buildings shall be provided using soilcrete. Soilcrete shall consist of an approved soil or gravel with 5% by weight of Portland Cement and sufficient water to increase the moisture content of the material to the optimum value for the compaction equipment employed and the density required.

The methods of construction shall be in accordance with clause 5.5 of SABS 1200ME.

PSD6 TOLERANCES

PSD6.2 Moisture Content and Density

The following shall be added to sub clause 6.2: "The degree of accuracy for moisture content and density shall be Degree of Accuracy II".

PSD7 TESTING

PSD7.1 Delay for Inspection and Testing Foundations

Add to the Sub-Clause: In the case of the structure(s) listed hereunder the prices quoted in the Schedule of Quantities and the programmed time for carrying out foundation excavations shall include for up to 2 working days delay to permit the Engineer to carry out tests or to get expert opinion on the founding material, should he consider these to be necessary. No claim for standing time or other extra costs for such delay will be accepted by the Engineer, neither will an extension of time be granted, except where the delay exceeds 2 working days.


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The structures to which this Sub-Clause applies is as follows:

• New Pump Station

• Delivery pipework Valve Chamber

• Manholes and valve chambers

PSD7.2 Taking and Testing of Samples

Add to the Sub-Clause: Determination of the standard of compaction achieved shall be carried out in accordance with standard methods of testing road construction material published by the Department of Transport Division of National Road, Publication TMH.1.

PSD 8 MEASUREMENT AND PAYMENT

PSD 8.2 Scheduled Items

PSD 8.3.14 Excavation for open drains

Excavating soft material situated within the following depth ranges below the surface level: (i) 0 m up to 1,5 m........................................................................................... .Unit : m3 (ii) Exceeding 1,5 m and up to 3,0 m............................................................... Unit : m3

The tendered rates shall include full compensation for the excavation of material for open drains and channels. Open-drain excavation shall include all excavation required for constructing a channel with a bottom width of less than 4 m or a V-shaped channel with side slopes steeper than 1:4, and total width at the top of less than 5 m. Open drain excavation includes excavation of channels to direct the course of streams, as shown on the drawings or as directed by the engineer, to the required lines, levels and grades and the disposal or stockpile of the material on site as directed, including a free haul within the site.

PSD 8.3.15 Clearing and shaping existing open drains...……………..……………………. Unit : m3

Excavating soft material situated and dispose of by (i) Spreading on site within the site (ii) Transporting off site to a suitable disposal site.

The unit of measurement shall be a cubic metre of sediment removed, measured in place before removal. The tendered rate shall include full compensation for excavating the material, protecting the existing drainage structures, trimming the floors and sides of the open drains, loading, transporting and disposing of material as prescribed, including free-haul.


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PSDB : EARTHWORKS (PIPE TRENCHES) (Applicable to SABS 1200 DB - 1989) PSDB 1 SCOPE

Add the following to this Clause: The provisions of this specification shall apply mutatis mutandis to portal and rectangular precast concrete culverts.

PSDB 3 MATERIALS

PSDB 3.1 Classes of Excavation

Add to Sub-Clause: Notwithstanding the provisions of Sub-Clause 3.1, the materials excavated other than hard rock will not be classified for purposes of measurement and payment. The unit rate for excavation shall cover excavation in all materials other than hard rock.

PSDB 3.5 Backfill Material

In paragraph (a) insert "and (c)" after "(b) in the first line and in the third line delete "150 mm" and substitute "100 mm". Renumber paragraph “(b)” as "(c)" and insert the following new paragraph (b): b) In the particular area subject to road traffic which lies between lines 2,0 m beyond

edge of roadway where mountable kerbs are used and 1,0 m beyond back of kerb for barrier kerbs, hereinafter referred to as "areas under roadways", the material used for backfill shall be one of the following:

i) A subbase quality material conforming to the requirements of SABS 1200ME

compacted in 150 mm layers to 93% Mod. AASHTO density.

ii) An approved selected granular material compacted in 150 mm layers to 93% Mod. AASHTO density.

Amend paragraph (c) by the insertion after the word "traffic" of the words "other than under roadways". Add "The materials specified herein shall be used for backfill under paved sidewalks and in other areas ordered by the Engineer."

PSDB 3.5(d) Cement Stabilised Backfill

Add the following new Sub-Clause: Where scheduled, or directed by the Engineer, backfill shall be stabilised with 5% cement by mass. The backfill material shall have a plasticity index not exceeding 10 and all material must pass through a sieve of aperture size not exceeding that specified in SABS 1200 LB, Sub-Clause 3.2, as amended. The dry materials shall first be mixed in a concrete mixer whereafter sufficient water is to be added to produce the stiffest consistency available for placing with vibrators.


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PSDB 3.6 Materials for Reinstatement of Roads and Paved Areas

Delete the Sub-Clauses and substitute: Material used in the reinstatement of roadways shall fall into the following relevant categories: a) Foundation material recovered from the excavation of trenches across existing

roadways which, if so instructed by the Engineer, shall be set aside and re-used as sub-base material.

b) New material which shall conform to the requirements of

i) Clause 3.2.1 of SABS 1200 ME for the Sub-base ii) Clauses 3.2 and 3.3 of SABS 1200 MF for the Basecourse iii) Clause 3.2.2 of SABS 1200 ME for the Gravel Wearing Course

PSDB 3.7 Selection

Delete the second sentence and substitute the following: The Contractor is not required to use selective methods of excavating but shall, if so instructed by the Engineer, screen excavated material in order to produce material suitable for the bedding cradle or the bedding blanket.

PSDB 4 PLANT

PSDB 4.1 Excavation Equipment

Add to the Sub-Clause: Should any portion of a pipe trench exceed the specified depth, the Contractor will be held responsible for any additional costs which may arise as a result of such over-excavation. Concrete filling or imported compacted fill may be ordered by the Engineer to be placed below the bottom of the trench.

PSDB 5 CONSTRUCTION

PSDB 5.1 Precautions PSDB 5.1.2 Stormwater, Seepage and Dewatering of Excavations PSDB 5.1.2.2 Special Water Hazards

Add the following: No specific items will be scheduled for special water hazards; the Contractor shall include for dealing with all water in his tendered rates for earthworks. Refer Clause PSA 5.5 of the Project Specifications.


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PSDB 5.1.2.3 Sloping Ground

Delete the Sub-Clause and substitute: The Contractor shall be responsible throughout the duration of the Contract, inclusive of the Defects Liability Period, for the provision of all soil erosion preventative measures necessary to protect the trenches, pipeline(s) and land utilised by the Contractor during the Contract from any adverse effects of soil erosion, settlement, scour, etc., resulting from the construction of the Works. Cross embankments, generally extending across the full width of the working strip, consisting of low earth mounds shaped to rounded form and so oriented as to have a fall of 1% along their length, shall be constructed with compacted material having a minimum density of 90% modified AASHTO density and minimum dimensions and maximum spacings dependent on the slope of the ground along the length of the pipeline, as indicated in the following table :

Slope of Ground

Minimum Height

Minimum Base Width

Maximum Spacing

0% - 2%

No cross-embankments

required

2% - 5% 300 mm 1,2 m 55 m

5% - 10% 300 mm 1,2 m 40 m

10% - 15% 375 mm 1,5 m 30 m

Greater than 15%

450 mm 1,7 m 20 m

The top width of all cross-embankments shall be at least 300 mm. The height of the cross-embankments for a distance of 1 metre on either side of the trench centreline shall be raised 150 mm above the remainder of the cross-embankment to allow for settlement. In order to form a satisfactory drainage channel upstream of each cross-embankment (at a slope of 1%) the crown over the backfilled trench shall be removed for a distance of 0,5 m upstream of the cross-embankment. Cross-embankments shall be constructed to the same minimum standards and dimensions indicated above wherever artificial slopes have been formed on the working strip or other areas used during construction and, with the approval of the Engineer, are permitted to be so left. Payment will be made for the construction of cross-embankments in accordance with Sub-Clause 8.3.4(c), provided construction thereof has been either ordered or approved by the Engineer prior to the commencement of such construction.

PSDB 5.1.2.4 Cross Walls in Trenches

Add new Sub-Clause: The Engineer may order the Contractor to construct cross walls in trenches to minimise the danger of flooding. Such cross walls shall be constructed to details given by the Engineer. Measurement and payment for construction of cross walls ordered will be on a rate basis where so scheduled or alternatively on a daywork basis.


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PSDB 5.1.5 Maximum Length of Open Trenching Add new Sub-Clause: The Contractor shall plan his operations in such a manner that the length of trench excavation remaining open shall be restricted to the absolute minimum. No excavation for prefabricated culverts may be commenced until the pipes or culverts to be installed are on site, and the excavations shall be backfilled within seven days of the pipes or culverts being installed. Unless otherwise permitted by the Engineer in writing the total length of open trench shall not exceed 300 m in the case of the Total Project or 100 m in the case of individual portions of the contract. Regardless of any approval or permission granted by the Engineer, the Contractor shall comply with any restrictions on length of trench contained in his insurance policy. All manholes, catchpits, kerb inlets, etc, shall be completed and backfilled at the same time as the installation of the prefabricated culverts.

PSDB 5.2 Minimum Base Widths Specified

Add to the Sub-Clause: Trench sides shall be as near vertical as possible in order to minimise the quantity of backfill material required and to avoid possible difficulties where pipelines have to be installed parallel to existing services, fences, hedges, etc. The base width for trenches for cables, ducts and unbedded flexible continuous piping of external diameter less than 125 mm laid at a depth not exceeding 1,5 m, shall be equal to the external diameter of the cable, duct or pipe, plus a side allowance of 200 mm on either side.

PSDB 5.5 Trench Bottom

Add to the Sub-Clause: a) On completion of excavation, before the bottom is trimmed or bedding is placed,

the bottom of the trench in suitable material shall be so compacted that the density of the upper 100 mm thick layer of material is 93% of modified AASHTO density

b) Should the nature of the material be such that the specified density cannot be

achieved the bottom of the trench shall be over-excavated, the bottom of the over-excavation compacted, and the excavated material replaced and compacted; the depths of the over-excavation, which shall be agreed with the Engineer shall be such that the specified density is attained at the bottom of the trench.

In waterlogged conditions and/or where so instructed by the Engineer a 150 mm thick layer (See PSLB 3.2.3) of imported 20 mm to 6 mm graded stone shall be laid under pipes.

PSDB 5.6.1 Backfilling - General

Add to Sub-Clause 5.6.1: Notwithstanding the requirements of Sub-Clauses 5.6.1 and 5.6.6, no pipe joint or pipe fitting shall be covered by either blanket or backfill material prior to the successful completion of the visual inspection and pressure testing of the relevant section of the pipeline.


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PSDB 5.6.2 Material for Backfilling

Delete fourth, fifth and sixth lines and substitute the following : Hard rock material shall not be used for, or incorporated into, the backfill above the bedding layers without the Engineer's approval.

PSDB 5.6.3 Disposal of Soft Excavation Material

Add to the Sub-Clause: Surplus material or unsuitable material which is not disposed of within the trench servitude shall be disposed off site or some other distance where so scheduled.

PSDB 5.6.4 Disposal of Intermediate and Hard Rock Material

Add to the Sub-Clause: Surplus intermediate material (where applicable) and hard rock material from trench excavations shall be disposed off site or within the freehaul distance from the source of such material as instructed by the Engineer.

PSDB 7 TESTING

Insert "and trench bottom" after "backfilling" in the first line. Insert "5.5 and " before 5.7" in the fourth line.


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PSDK : GABIONS AND PITCHING

(Applicable to SABS 1200 DK - 1996) PSDK 3 MATERIALS PSDK 3.1.1.1 Quality

Add to the Sub-Clause : The stone shall be subjected to the weathering test as per sub clause 7.3. The stone shall be subjected to the durability test as per sub clause 7.4.

PSDK 3.1.2 Gabion Cages

Add to the Sub-Clause: The wire used for the fabrication of wire mesh cages and for lacing and bracing operations shall be galvanised (zinc coated) and PVC-coated in full conformity with Sub-Clause 3.1.2.2.

PSDK 3.2.3 Wire Mesh, Lacing and Bracing Wire

Add to the Sub-Clause: Wire netting for gabion and mattress cages shall be hexagonal steel wire mesh strengthened by selvedges of heavier wire and by mesh diaphragms which divide the cages into compartments (see PSDK 5.1.3 below).

Nominal 80 mm mesh shall be used for gabion cages, with 2,4 mm dia. steel wires, galvanised and PVC-coated. Nominal 60 mm mesh shall be used for mattress cages, with 2,0 mm dia. steel wires, galvanised and PVC-coated. Selvedge wire shall be galvanised and PVC-coated and the diameter shall be in accordance with Table 2 of SABS 1200 DK.

PSDK 3.1.4 Geotextile

Add to the Sub-Clause: Geotextiles shall be as shown on the drawings and/or scheduled in the Schedule of Quantities.


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PSDK 3.2.1.2 Size Add to the Sub-Clause: The type of pitching stone to be used at various locations shall be Extra Heavy, Heavy, Ordinary or Light as specified hereunder: Location Type of Pitching

Side slopes Light (200 thick with 110 mm stone dimension)

PSDK 3.2.3 Wire netting

Add to the Sub-Clause: The wire netting specified in this Sub-Clause shall be used with stone pitching and not with gabion and mattress cages.

PSDK 5 CONSTRUCTION

PSDK 5.1.3 Type of cage

Add new Sub-Clause : The size of cages for gabions shall be a maximum of 3000 x 1000 x 1000 mm and shall be divided into cells having a volume not greater than one cubic metre. The size of cages for mattresses shall be a maximum of 2000 x 1000 x 300 mm and shall be divided into cells having a volume not greater than 0,3 m3.

PSDK 5.1.4 Diaphragms

Add new Sub-Clause : Each diaphragm shall be connected in the same manner to the sides and top panels in addition to the bottom panel.

PSDK5.2.3 Assembly

Add to the Sub-Clause : All gabion and mattress cages shall be connected to adjacent gabion and/or mattress cages by lacing the adjacent selvedge’s together with 2,0 mm dia. galvanised and PVC coated steel wire. The lacing shall be in accordance with Sub-Clause 5.1.7.

PSDK 5.2.4.2 Mattresses used in revetments and aprons

Add to the Sub-clause : Where gabions and mattresses are placed in exposed positions the rock particles forming the exposed faces shall be specially selected so as to present a fair and even surface.


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PSDK 5.3.4 Wired Pitching Add to the Sub-Clause : The areas in which wired or grouted wire pitching is to be used are indicated on the drawings.

PSDK 8 MEASUREMENT AND PAYMENT PSDK 8.2.2 Gabions with galvanized wire Unit : m3. Add the Following:

The rate shall include surface preparation for bedding of gabions and geotextiles as indicated in DK 8.2.4.

For payment purposes a distinction will be made to the various standard size units

required for construction. PSDK 8.2.3 Extra Over 8.2.2 for Packing Selected Stone for Exposed Face Unit : m2.

Add to the Sub-Clause : The method of selecting and packing stone for exposed faces where scheduled shall be as specified in Sub-clause 5.2.7 - Special Finish.


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PSDM : EARTHWORKS (ROADS, SUBGRADE) (Applicable to SABS 1200 DM)

PSDM 3 MATERIALS

PSDM 3.2 Classification for Placing Purposes

PSDM 3.2.3 Selected Layer

Add the following to paragraph (d): "or 3 x GM + 10 as approved.:

PSDM 8.3.4 Cut To Fill, Borrow To Fill …………………………………………………………….Unit : m3

Substitute “90 % “ in DB 8.3.4 with “90 % “(100% for sand)” and “road prism” with “road prism and borrow pits”. Add the following: Separate items will be scheduled for fill in the road prism, fill on spoil areas and fill on site (where a minimum density for such spoil material is required by the Engineer) and fill from the road prism, fill from the site and fill from commercial sources. The rate for fill from commercial sources shall, in addition to the requirements of DM 8.3.4, cover the cost of the location of the source, complying with all the applicable precaution as set out in DM5.1, obtaining the material, selection and transport from the source to the point on the road where it is to be used. (for hand excavation see SABS 1200D)

PSDM 8.3.5 SELECTED LAYER COMPACTED TO 93% OF MOD AASHTO MAXIMUM

DENSITY……………………………………………………………………………….. Unit : m3

Substitute “93 % MOD AASHTO density” in the heading of DM 8.3.5 with “ % MOD AASHTO density as separately scheduled and specified” Add the following: Separate items will be scheduled for lower and upper selected layers as well as for material from the site of works and from commercial sources. The rate for selected layers from commercial sources shall, in addition to the provisions of DM 8.3.5, allow for locating the source, complying with all the applicable precautions as set out in DM 5.1, obtaining the material, selection and transport from the source to the point on the road where it is going to be used. No payment shall be made for the removal and replacement of unsuitable imported material.


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PSG : CONCRETE STRUCTURAL (Applicable to SABS 1200 G - 1982)

PSG 2 EXPLANATION OF TERMS

PSG 2.4.3 Joints

Delete the fourth sentence and substitute: The Engineer may order further joints prior to the commencement of casting the relevant concrete wherein they are to be situated. Such joints will become "designated joints" and will be paid for in terms of Sub-Clause 8.5, or as may be otherwise agreed. However, should the Contractor require further joints to suit his own purposes he shall first obtain the approval of the Engineer. Such further joints may then be constructed but these will neither be "designated joints" nor will they be paid for.

PSG 3 MATERIALS PSG 3.2 Cement PSG 3.2.1 Applicable Specifications

REPLACE THE CONTENTS OF THIS SUBCLAUSE WITH THE FOLLOWING: Subject to the provisions of 3.2.2, cement shall comply with the requirements of SABS EN 197-1 for CEM 1 42,5.

PSG 3.2.3 Storage of Cement

Add to the Sub-Clause : Cementitious material shall not be kept in storage for longer than 4 weeks without the Engineer's permission.

PSG 5 CONSTRUCTION PSG 5.1.2 Fixing of Reinforcement

Add to the Sub-Clause: Reinforcement shall not be welded. Fixing blocks for the attachment of fixtures may be embedded in concrete provided that the strength or any other desirable feature (such as appearance of the member) is not, in the opinion of the Engineer, impaired thereby. Where mortar blocks are used they shall be properly shaped so as not to slip out of position and shall be made of the same mix as the mortar of the concrete in which they are to be placed and they shall be cured in water for at least 7 days. The mortar shall be well compacted by approved means into the moulds to result in blocks with a density of at least 2 300 kg/m3 and which are free from honeycombing. Mortar blocks which have not been manufactured and cured strictly in accordance with these requirements or which are in any other way considered unsatisfactory by the Engineer, shall be rejected and shall be removed from the Site.


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PSG 5.3 Holes, Chases and Fixing Blocks Add to the Sub-Clause : Fixing blocks for the attachment of fixtures may be embedded in concrete provided that the strength or any other desirable feature (such as appearance) is not, in the opinion of the Engineer, impaired thereby.

PSG 5.4 Pipes and Conduits

Add to the Sub-Clause : Pipes, specials and other items to be set in concrete as shown on the drawings, shall have all surfaces in contact with the concrete freed of all bituminous or other coatings and thoroughly scraped and cleaned except where directed otherwise by the Engineer. They shall be set firmly in position with shuttering fixed around them. The clear space between any pipes and/or specials and the reinforcement shall be 40 mm. Concrete shall be poured and worked into intimate contact with the surfaces of all cast in items. Holding down bolts to be cast into concrete shall be provided according to the dimensions and shapes shown on the drawings and shall be approved by the Engineer prior to concreting. The bolts shall be fixed securely in position before concreting begins in such a manner that displacement during the concreting operation does not occur. The projections above concrete, and threads shall be well protected against any damage which may result from placing of concrete.

PSG 5.5.1.1 Quality : General

Add to the Sub-Clause : All concrete other than above ground concrete in non-water retaining structures shall be regarded as watertight, i.e. water retaining concrete, notwithstanding that a test for water tightness may not be called for.

PSG 5.5.1.5 Durability

Add to the Sub-Clause: The minimum content of cementitious material in concrete for water retaining structures shall be as specified in Sub-Clause 5.5.1.7 The exposed conditions at the site of the works are to be considered as severe.

PSG 5.5.1.6 Prescribed Mix Concrete

Delete the contents of this Sub-Clause and substitute the following: Prescribed mix concrete will not be used under this Contract.

PSG 5.5.1.7 Strength Concrete

Add to the Sub-Clause : The concrete mixes for the various grades of strength concrete shall be designed by a laboratory, approved by the engineer.


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At least six weeks before placing any concrete on the Works the Contractor shall supply and deliver to the approved laboratory, at his own cost, samples of the aggregates he proposes to use in the concrete mixes. The approved laboratory shall prepare a batch of each grade of the designed mix and manufacture six cubes for compression testing in accordance with SABS Method 863, three of which will be crushed at 7 days and three at 28 days.

A provisional sum has been included in the Schedule of Quantities to cover the fees and charges levied to the Contractor by the approved laboratory in designing and testing the laboratory cubes of this concrete mix. Strength concrete for water retaining structures This concrete is designated as grade 35 MPa concrete with the desired durability in accordance with the provisions outlined below: The minimum cementitious mixture contents of concrete shall be 325 kg/m³. The nominal stone size is 19 mm. The maximum water content shall be 175 litres/m3. The ratio of the combined cementitious mixture : water shall be 1,86:1 unless that ratio gives rise to lower cementitious mixture contents than that allowed, in which case a higher ratio will be required. The characteristic cube strength at 28 days shall be not less than 35 MPa. The final mix design is to be submitted by the Contractor to the Engineer for approval.

PSG 5.5.2.3 Aggregates

Add to the Sub-Clause: Batching for strength concrete is to be by mass using an approved type of weigh-batching plant.

PSG 5.5.3.2 Ready-mixed Concrete

Delete the first sentence and substitute the following: Ready mixed concrete is permitted provided the concrete is placed within 1 hour from the time it is discharged from the mixer at the central concrete production facility. The results of quality control tests from such a production facility will not be acceptable for evaluation in terms of Clause 7.3 of SABS 1200 G. The method of controlling deliveries shall be subject to the approval of the Engineer.

PSG 5.5.5.10 Placing (Continuous walls) Add new Sub-Clause : In the case of continuous walls, these are to be cast in lifts of such height that each lift can be poured uninterruptedly in one continuous operation over the entire perimeter of the wall. No vertical or inclined construction joints of any kind will be permitted in continuous walls unless they have been specifically ordered or authorised by the Engineer. The placing of concrete shall commence at a convenient point on the perimeter of the wall and shall proceed both ways simultaneously so that fresh concrete meets fresh concrete. The Contractor may be required to work shifts to make the operation continuous.


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PSG 5.5.5.11 Blinding Layer Add new Sub-Clause : Beneath all structural grades of concrete, or elsewhere if so ordered by the Engineer, or shown on drawings, the bottom of the excavation is to be covered by a blinding layer (screed) in Grade 15/19 concrete to a depth of 75 mm to prevent disturbance of the ground and to serve as an even and accurately positioned working floor for setting reinforcement and placing foundation concrete. This blinding layer shall be laid immediately after excavations have been taken out, trimmed to the required depths and have been inspected and approved by the Engineer.

PSG 5.5.7 Construction Joints

PSG 5.5.7.3 Surface Preparation of Joints

Delete Sub-Sub-Clauses (a), (b), (c) and (d) and substitute:

(a) All horizontal and vertical construction joints shall be cleaned of all dirt and loose particles and shall be prepared to the satisfaction of the Engineer. All intersections of construction joints with concrete surfaces which will be exposed to view shall be made straight and level or plumb and shall be constructed to the details shown on the drawings.

(b) The Contractor is to provide a compressor on site for the whole period during

which concreting is in progress, and this must be available for cleaning concrete faces prior to placing fresh concrete or pouring joints.

(c) "Blowing off" may generally be carried out on horizontal surfaces but under

special circumstances approved by the Engineer it may also be carried out on vertical surfaces. The surface concrete to be prepared shall be between 4h and 8h old after completion of placing and shall be blown off using a mixture of air and water under a pressure of at least 500 kPa or by using a high pressure water jet until all dirt, laitance, etc is removed and particles of clean coarse aggregate are exposed sufficiently to produce a rough surface. Any loose particles of coarse aggregate shall also be removed. The success of this method of preparation depends on selecting the correct time (dependent on the type of cement) so that the concrete has set to just the necessary degree of hardness. The operation may therefore require to be undertaken outside normal working hours and at night. When the surfaces are at least 12h old any remaining loose fine aggregate particles shall be washed off.

(d) "Scabbling", which refers to removal of all surface laitance plus roughening the

concrete surface with pneumatic picks in order to expose the coarse aggregate in a uniform pattern, may be carried out on both horizontal and vertical surfaces. The surfaces to be prepared in this manner shall be at least 12h old after mixing the concrete. At least 35% of the roughened surface area shall consist of exposed coarse aggregate.

(e) All surfaces prepared either by "blowing-off" or by "scabbling" shall be kept

continuously wet until the next lift of fresh concrete is to be placed against them; the minimum time being 12h.


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(f) The use of approved wet-to-dry epoxy resin concrete adhesive, strictly in

accordance with the manufacturer's instructions, will be permitted in the formation of concrete joints at surfaces where the concrete is older than 7 days.

Placing Fresh Concrete at Joints (a) Vertical construction joint surfaces shall be, as instructed by the Engineer:

either, smooth, clean and kept damp for at least 24h before placing fresh concrete against them or, scabbled, clean and damp as specified above.

(b) Horizontal construction joint surfaces shall have been "scabbled" or "blown off",

cleaned and kept continuously wet as specified above before fresh concrete is placed over them. Immediately before placing the fresh concrete, the damp surface of the set concrete shall be evenly coated (by brushing or brooming) with a layer of cement mortar between 10 mm and 15 mm thick. The water/cement ratio and the cement/sand ratio of this mortar shall be the same as that of the fresh concrete to be placed and the mortar shall be producing by leaving the coarse aggregate fraction out of a batch of the fresh concrete. Coating with mortar is to be done in stages immediately before areas of set concrete are covered with fresh concrete, so that no mortar is exposed for longer than one hour after mixing, or less if the mortar has become dry or has started to set before being covered with fresh concrete. Any dried out mortar shall be removed and, after cleaning the surface, shall be replaced with fresh mortar.

(d) No fresh concrete shall be placed on the top surface of concrete which is laterally

restrained (e.g. by formwork or by in-situ earth) while the top layer of concrete is between 3 hours and 12 hours old after mixing. No fresh concrete shall be placed on top of the concrete with an unrestrained lateral surface while the top layer of concrete is between 2 hours and 12 hours old after mixing.

PSG 5.5.8 Curing and protection


Any face of freshly placed concrete shall not be exposed to the sun or wind for more than 0,5 hours after being placed until it is fully cured.

Curing Compounds

The use of membrane curing compounds will be subject to the approval of the Engineer.

Before any membrane curing compound is used, each batch shall be tested on a trial surface to ensure that it forms a satisfactory membrane, and any compound which is unsatisfactory in the opinion of the Engineer, shall be rejected. Surfaces where curing membranes are used shall be treated in such a manner that the final concrete texture and colour blends in with the rest of the concrete work. Furthermore, the Engineer will, at his discretion, require the Contractor to immediately adopt an effective alternative means of curing of any area of the structure to which a membrane has been applied, which, in the opinion of the Engineer, is unsatisfactory.

PSG 5.5.9.2 Hot Weather Concreting

Delete the first two sentences and substitute : When concreting operations are being carried out at ambient temperatures in excess of

32°C, the Contractor shall apply the relevant recommendations for hot weather concreting set out in American Concrete Institute publication ACI 305R-77 "Recommended practice for hot weather concreting".


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PSG 5.5.10.1 Unformed Concrete Surfaces

All exposed surfaces not finished against forms shall be given a wood-floated finish unless a steel floated (or steel trowel) finish is indicated on the drawings or in the documents.

PSG 5.5.10.2 Add to the Sub-Clause

Wood-floated Finish

The surface shall first be given a finish as specified in Sub-clause 5.5.10.1 and after the concrete has hardened sufficiently, it shall be floated to a uniform surface free of float marks. The screeded surface shall be wood-floated, either by hand or machine, only sufficiently to produce a uniform surface free from screed marks.

Steel-floated Finish Where steel-floated (or steel trowel) finish is indicated, the surface shall be treated as specified in PSG 5.5.10.1 except that when the moisture film has disappeared and the concrete has hardened sufficiently to prevent laitance being worked to the surface, the screeded surface shall be steel-trowelled under firm pressure to produce a dense, smooth, uniform surface free from trowel marks.

PSG 5.5.11 Watertight Concrete

Add to the Sub-Clause: The following structures shall be subject to a water-tightness test : All pump sumps, water retaining structures and division boxes No vertical or inclined construction joints of any kind will be permitted in the perimeter walls of water-retaining structures unless these have been specially ordered or authorised by the Engineer.

PSG 5.5.11.1 Concrete for Water Retaining Structures

Add new Sub-Clause: Grade 35 concrete shall be used for the construction of all water retaining structures.

PSG 5.5.12 Concrete in Wet Ground

Delete the Sub-Clause and substitute : The Contractor shall be fully responsible for keeping excavation free from water whilst construction work is being carried out. The methods by which he proposes to achieve this shall be approved by the Engineer before being implemented. The cost of dewatering shall be included in the tendered rates for the construction work and no separate payment shall be made for such dewatering throughout the construction period.

PSG 5.5.13.1 Grouting

Add new Sub Clause Bedding of base plates shall not be carried out until the superstructure or item of plant mounted on it has been finally levelled and plumbed. The base plates shall be supported by steel wedges and the space beneath the base plates shall be thoroughly cleaned immediately before grouting.


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The grout shall be a non-shrink cementitious grout, "Fosroc Conbextra GP" or similar approved. This grout shall be placed in strict accordance with the manufacturer's specifications.

PSG 5.5.13.2 Grouting of Pipework Passing Through Concrete Members

Add new Sub-Clause: Where entry holes for pipework have been provided in walls, etc, the Contractor shall be responsible for the grouting in of such pipework regardless of whether or not these have been supplied by himself. Before commencing the positioning in holes of any pipework the Contractor shall; a) remove all shuttering and boxing remaining in the holes; b) make any alterations required to the position and shape of the holes to

accommodate the pipework; c) thoroughly clean and scabble the sides of the holes so as to obtain satisfactory

bond surface for the new concrete; and d) free all surfaces of the pipework of all coatings, and thoroughly scrape and clean

the pipework. After accurately positioning the pipework in the respective holes, the Contractor shall fix the pipework in a suitable manner to prevent movement. Immediately prior to grouting being carried out by the placing of mortar and concrete around the pipes, the surface of the existing concrete shall be saturated with water. All surplus water shall be removed and the surface covered with a layer, approximately 12 mm thick, of mortar consisting of 3 parts concrete sand and 1 part cement. The concrete ingredients shall be mixed and placed as dry as possible to obtain a dense, waterproof concrete. Where a watertight seal is required, the concrete shall be carefully worked around the pipework and puddle flange, if any, and shall be vibrated in layers so as to obviate any falling away from pipework surfaces of the concrete already placed. The whole shall, when set, form a dense, homogeneous, and waterproof mass. A spare vibrator with an independent power source shall be kept in readiness to ensure continuity of placing in the event of the breakdown of the duty vibrator. Smooth formwork that has been suitably strengthened for use with a vibrator shall be provided for facing the concrete around the pipework.

PSG 5.5.13.3 Dry-packed Grout Add new Sub-Clause :

When dry-packed grout is specified, under baseplates etc, only sufficient water shall be added to make the mixture ball when squeezed in the hand. Before any grouting is done with dry caulking the surfaces between which the caulking is to be placed shall first be thoroughly cleaned and flushed with water. All surplus visible water shall be wiped or blown away and the dry caulking shall be forcefully rammed or hammered into place using suitable tools. Exposed surfaces shall be finished off neatly with a trowel and extensive exposed areas shall be covered with wet sacking and kept damp for at least 24 hours. Where additives are required for grouting operations, these shall be brought on to site in the manufacturer's unopened containers and used strictly in accordance with the


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manufacturer's instructions which the Contractor shall not fail to obtain. If necessary, the Engineer may require the Contractor to undertake preliminary tests to check the behaviour of proprietary additives under the conditions pertaining on the site.

PSG 5.5.13.4 Epoxy Grout (Epoxy mortar type only)

Add new Sub-Clause : The manufacturer's instructions shall be observed when an epoxy grout is used.

PSG 5.5.16 Expansion Joints in Water-containing Structures PSG 5.5.16.1 Expansion joints shall be formed to the dimensions and shapes shown on the drawings

and provided with waterstops, fillers, bond breakers and sealants where detailed and installed strictly in accordance with the manufacturer's recommendations. Before sealing the joint recesses, they shall be thoroughly cleaned and dried out. The surfaces of the joint are then to be primed and the sealing compound applied, all in accordance with the manufacturer's recommendations and in such a manner that perfectly watertight joints free from air pockets or blow holes are formed. After sealing, the joints are to be tested for air pockets and blow holes by caulking with a blunt tool.

PSG 5.5.16.2 Sealing expansion joints with polyurethane sealants

The polyurethane used for joint sealing on this contract shall be supplied by a company approved by the Engineer. Material shall be stored and protected to avoid damage, degradation or contamination. The Contractor shall construct the joints to the degree of accuracy required by the manufacturers of the various joint components specified or to Degree 1 accuracy as defined in terms of Clause 6 of SABS 1200G, whichever gives the higher degree of accuracy. The preparation of joints and mixing and placing of the polyurethane shall be done strictly in accordance with the manufacturer's instructions and as outlined below: a) The sealing slot surfaces shall be ground with an angle grinder to ensure that the

polyurethane bonds onto sound concrete free of any traces of water, laitance, mould oil, sand or any material which may affect the bond.

b) After grinding the joint shall be blown clean using clean dry compressed air. c) An approved bond breaker shall be placed at the bottom of the joint. d) The bonding faces shall be primed strictly in accordance with the manufacturer's

instructions with special cognisance being taken of the working life of the primer. e) The base compound and the activator compound shall be thoroughly mixed with

care being taken that all areas within the container are covered during the mixing process.

f) When applying the sealant into the joints care shall be taken to ensure that the

material is properly worked into the bottom corners of the slot and that all air is expelled. After application the material shall be tooled to a neat, smooth finish.

g) After completion, the joint shall be allowed to cure for the period recommended by

the manufacturer after which random test sections the Engineer may require to be cut out to test adhesion and consistency of the joint filling. The cut out samples shall be sent to the manufacturer for testing and analysis.

h) After completion the joint shall be protected from physical damage until the

structure is put into service.


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PSG 6 TOLERANCES PSG 6.2.3 Specified Permissible Deviations

Add the following to the Sub-Clause : The following permissible deviations and degrees of accuracy shall apply unless otherwise specified or shown on the drawings. ACCURACY III i) Buried foundations of buildings and structures. ii) Encasement to underground pipes. ACCURACY II All other parts of the work except tops of walls and tops of weir walls ACCURACY I Tops of outer walls: ± 3 mm overall, but ± 1 mm over 3 m Tops of Weir walls: ± 2 mm overall

PSG 7 TESTS PSG 7.1.2 Frequency of Sampling

Add the following to this Sub-Clause : At least three samples shall be taken from each concrete structure cast daily exceeding 10 m3 in volume. The samples shall be taken at the following intervals: i) At the start of concreting ii) Midway through concreting iii) At end of concreting The Contractor shall take independent samples of each batch delivered to the Site of Works from central concrete production facilities and submit the test results for evaluation in terms of Sub clause 7.3.

PSG 7.2.3 Laboratory Testing

Add to the Sub-Clause : The Contractor will be liable for all costs incurred in making structural concrete cubes and having these tested.

PSG 7.2.5 Watertightness Tests

Add new Sub-Clause: Unless otherwise ordered by the Engineer, all water containing structures shall be tested for watertightness. Backfilling around structures which are to be tested shall be delayed until after the testing unless otherwise authorised by the Engineer. Each structure shall be cleaned out, then filled with clean water in four equal stages up to normal top water level. While filling is in progress, the structure shall be examined for leaks and if it is obvious that some appreciable leak has developed the test shall be terminated, repairs carried out and testing resumed.


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As soon as the water surface is steady after filling, the water level shall be established by means of a hook gauge to be provided by the Contractor and recorded, and thereafter, will be measured and recorded by the Engineer each successive 24 hours or less, in relation to a fixed bench mark. The results will be graphed so as to establish the progressive rate of absorption and leakage. Concurrently with this test the Contractor shall carry out an evaporation loss test by providing a steel tank 600 mm x 600 mm x 450 mm deep, filled with 300 mm of water, and accurately measuring the drop in water level during 24 hours. This drop in water level shall be regarded as a measure of the evaporation loss, and shall be used to calculate the probable evaporation loss in the structure being tested. If the nett rate of loss of water at any stage exceeds 5 mm depth per 24 hours (plus an allowance for evaporation) at the end of three days in the case of the first three stages, and at the end of seven days in the case of the fourth stage, and there is no prospect, in the opinion of the Engineer, of the rate of water loss reducing to that required, he shall have the right to deem the water containing structure to be not watertight, and to notify the Contractor accordingly. The Contractor shall forthwith take such steps, at his own expense and to the approval of the Engineer, as may be considered necessary to achieve watertightness. In the event of the steps taken by the Contractor proving ineffective in reducing the rate of drop in water level over a period of 7 days to less than 5 mm depth per 24 hours plus an allowance for evaporation the Engineer shall have the right to order the Contractor to carry out at his own expense, approved steps, on completion of which the Contractor shall again clean out and test in the manner specified also at his own expense. Notwithstanding the fact that a structure may have passed the test described in the aforementioned paragraphs, it will not be acceptable for any leaks or damp spots to show on any exterior surface. Any such defects shall be sealed and repaired in a manner and to a standard acceptable to the Engineer. Upon satisfactory completion of the test the structure shall be left full of water unless otherwise ordered by the Engineer. In the event of leakage being evident at any time during the Defects Liability Period, the Engineer, before issuing his Final Certificate may call for further rectification and testing as already described, and will have the right to withhold this Certificate until he considers the work to be satisfactory.

PSG 8 MEASUREMENT AND PAYMENT PSG 8.1.1 Formwork

ADD THE FOLLOWING SUB-CLAUSES:

PSG 8.1.1.7 For construction joints at kickers, all additional costs for formwork to edges up to

300 mm high will be deemed to be included in the rates tendered for vertical formwork to sides of walls and will not be measured separately in narrow widths.

PSG 8.1.1.8 No formwork will be measured to edges of blinding layers under structures and the cost

thereof, (if needed), will be deemed to be included in the rates tendered for concrete in blinding layers.

PSG 8.1.1.9 Back-shuttering or formwork to top revealed surfaces of sloping - or conical formwork will

only be measured to surfaces of over 40° and up to 85° to the horizontal. PSG 8.1.1.10 Formwork to Edges of Mass Concrete

No separate payment will be made for formwork to the edge of mass infill concrete.


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The rates tendered for mass infill concrete shall cover the cost of such formwork. PSG 8.1.1.11 Formwork to Sides of Foundations

Formwork to the sides of foundations will not be measured for payment unless this formwork has been scheduled for the specific item concerned. Authorisation for the use of side formwork will be given by the Engineer only where, for reasons beyond the Contractor's control, it is not possible or practical to use the side of the excavation to retain the concrete. The Contractor will be expected to dig neat excavations for foundations with vertical sides. No overbreak will be measured or paid. The concrete shall be cast against the sides of the excavation. Payment for concrete shall be based on the nett volume of concrete as computed from the dimensions of concrete shown on the drawings.

PSG 8.1.2.2 Reinforcement

Clauses 8.1.2.2 a, 8.1.2.3 a and 8.1.2.3 b of SABS 1200 G shall not apply to this contract. Reinforcing will be measured for bar sizes up to and including 16 mm diameter and for bar sizes exceeding 16 mm diameter otherwise in accordance with SABS 1200 G. Mild and high tensile bars will be measured separately.

PSG 8.4.7 Watertightness Testing

Cleaning out and watertightness testing of (structure indicated)

Unit : sum The rate shall include for all labour, plant and materials to clean out and test the structure, including all necessary pipework and connections, in accordance with PSG 7.2.5. The water used for the testing shall be provided by the Contractor from available sources on or near the site of works.

PSG 8.4.8 Dowelling

Holes shall be drilled 1,5 times the diameter of the dowell to a depth as stated in the Schedule of Quantities and filled with epoxy grout. The dowell diameter and length shall be scheduled Unit : No The above rate shall include for all labour, plant and materials for drilling, providing and fixing the dowell.


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PSH : STRUCTURAL STEELWORK (Applicable to SABS 1200 H 1990) PSH 3 MATERIALS PSH 3.1 Structural Steel

Add to the Sub-Clause: All structural steelwork which shall include ladders, safety cages and platforms, shall be manufactured from GRADE S355JR grade steel in conformity with EN 1005-2-S355JR, except where shown to the contrary on the Drawings or in the schedule of quantities. Stainless steel shall be ANSI grade 304 L or, where no welding is required grade 304, except where shown to the contrary on the Drawings or in the schedule of quantities. Grade 3CR12 corrosion resistant steel shall be used where scheduled or shown on the Drawings. The chemical composition and properties of this steel shall be as set forth in the publication "Fabricating 3CR12 Corrosion Resisting Steel" issued by Middleburg Steel and Alloys (Pty) Ltd.

PSH 5 CONSTRUCTION

PSH 5.1.2 Shop Details

Add to the Sub-Clause: The Contractor shall prepare his own shop details based on the dimensions and details given on the Drawings and will be required to submit his shop details to the Engineer. He shall submit the shop details to the Engineer at least 14 days before commencement of fabrication.

PSH 5.7.6 Pipe Clamps and Brackets

Add new Sub-Clause: Clamps and brackets around pipes are to be constructed in 304SS and are to be provided with all necessary bolts for fixing to concrete.

PSH 6 TOLERANCES

PSH 6.2.2 Accuracy of Erection

Add to the Sub-Clause: The accuracy of erection shall be the degree of accuracy II as tabulated but amended as follows: In item e)2) of the table the Degree of Accuracy is given as "+ 5" shall be read as "+ 3".

PSH 7 TESTING PSH 7.1 Test Certificates

Delete the part sentence "in terms of the project specification" from the wording of the Sub-Clause and add the words "when so requested by the former" at the end of the sentence.


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PSHC : CORROSION PROTECTION OF STRUCTURAL STEEL

(Applicable to SABS 1200 HC : 1988) PSHC 5.9 Application of Metal Coatings

Add to the Sub-Clause: The grade of hot dip galvanising (HDG) required shall be that for ISO 1461-1999 heavy duty coatings carried out in accordance with that specification. This shall be applicable to all metalwork where HDG is called for either on the Drawings or in the Schedule of Quantities.

PSHC 8 MEASUREMENT AND PAYMENT PSHC 8.1 Principles

PSHC 8.1.1 Units

Add the following to the Sub-Clause: Separate payment for corrosion protection of structural steel shall only be made when so scheduled in the Schedule of Quantities. When not so scheduled, the cost of the corrosion protection work shall be deemed to be included in the price tendered for the structural steelwork.


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PSL : MEDIUM-PRESSURE PIPELINES

(Applicable to SABS 1200 L - 1983)

PSL 3 MATERIALS

PSL 3.1 General

Add to the Sub-Clause: The types of pipe materials called for under this Contract are: GRP Pipes Stainless steel pipes. Polyethylene pipes. uPVC pipes.

PSL 3.4 Steel Pipes, Fittings and Specials

Delete the Sub-Clause and substitute:

PSL 3.4.1 General

Add to the Sub-Clause: All steel pipes, fittings and specials supplied under this Contract shall be to the dimensions and details shown on the drawings or scheduled in the Schedule of Quantities. Each piece shall have its relevant item number painted onto the exterior surface prior to despatch from the factory.

PSL 3.4.2 Steel Pipes of NB up to 150 mm

Add to the Sub-Clause: Where pipes and fittings are scheduled, or shown on the drawings, which are neither "screwed" nor of "medium class" (or neither of these) then the requirements for the pipes and fittings so scheduled shall take precedence. Long runs of pipework may comprise pipes supplied in random lengths subject to the total length of the run being that specified or scheduled. The range of random lengths to be supplied shall be between 4 m and 7 m. Exact length of pipe shall be supplied where individual lengths of 7 m or less are scheduled or called for on the drawings. Tests certificates for the pipework are to be provided where so called for by the Engineer.

PSL 3.4.3 Steel Pipes over 150 mm NB


PSL 3.4.3.1 Grade of Pipe

All pipes supplied shall comply with SABS 719, as amended by this project specification.


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The pipes shall be manufactured from steel Grade A having a yield stress of at least 207 MPa except where other grades are specified hereunder. Grade B steel having a yield stress of 241 MPa shall be used for pipes where called for on the drawings or in the Schedule of Quantities. Grade C steel having a yield stress of 290 MPa shall be used for pipes where called for on the drawings or in the Schedule of Quantities.

PSL 3.4.3.2 Pipe Sizes and Lengths The outside diameter, wall thickness and the end preparation for pipes to be supplied under this Contract are as shown on the drawings.

PSL 3.4.3.3 Welds

Pipes shall be manufactured from steel strips or plates continuously welded along the seams and the height of the inner weld reinforcement shall not exceed 1 mm. In the case of pipes to be used with couplings, the external weld reinforcement shall be ground flush with the outer wall of the pipe over a suitable distance from the pipe end. Pipes should preferably have a continuous helical seam but nevertheless longitudinal and circumferential seams may be acceptable for this Contract subject to the Engineer's approval.

PSL 3.4.3.4 Hydraulic Testing at Factory

Each pipe shall be hydraulically tested in accordance with SABS 719 Clause 7.3.

PSL 3.4.4 Fitting and Specials (Pipes over 150 NB)


PSL 3.4.4.1 General

All fittings and specials shall be manufactured from straight pipe specified under the previous Clause; the pipe so used shall have satisfactorily passed the stipulated hydraulic pressure tests. Fittings and specials shall be manufactured and tested in accordance with the specification for straight pipe and additionally with Section 4 of BS 534. The nominal dimensions of each fitting and special required are itemised in the Schedule of Quantities and 'exact length' tolerances shall be adhered to. Bends shall generally be of the gusseted type having dimensions as given by Table 4 of BS 534 except where specified to the contrary in the Schedule of Quantities or where the Tenderer can offer a price advantage for supplying even curvature bends. The manufacturer shall be responsible for providing strengthening webs, crotch plates, gussets, etc. as he considers necessary to prevent excessive deflection or deformation of fittings and specials when subjected to hydraulic tests.

PSL 3.4.4.2 Puddle Collars

Puddle collars used as pipe anchorages shall be of the same dimensions as corresponding flanges but are to be undrilled. The collar shall be welded to the pipe with sufficient strength to be capable of transmitting a longitudinal force 33% greater than the internal hydraulic pressure to be applied when testing multiplied by the area of the bore and under that condition the stress in the weld metal shall not exceed its yield stress.


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Puddle collars not being used as anchorages shall have at least the same dimensions of corresponding flanges. They shall also be undrilled.

PSL 3.4.4.3 Closure Pipes

Closure pipes which will be cut on site to the exact lengths required, shall have the diametrical tolerances specified for the pipe ends applied over the full length of the pipe. Closure pipes shall be supplied in standard lengths.

PSL 3.4.5 Welding Tests at Factory

Add new Sub-Clause:

PSL 3.4.5.1 Qualification Tests for Welding Procedure

The qualification tests for welding procedure shall be carried out generally in accordance with the requirements of the American Petroleum Institute API 1104. Manufacture shall be established and the quality of the welds so produced shall be determined by carrying out ONE transverse tensile weld test and TWO guided cold bend tests on suitable coupon plates. The tests are to be carried out either before manufacture of the pipes to be supplied under this contract is commenced or before the manufacture of pipes in excess of a number previously agreed by the Engineer is carried out. The coupon plates shall be prepared either from plates of the same material as the pipe and welded in a similar manner to that to be used during production, or by cutting suitable specimens from a pipe selected at random by the Engineer from the first production pipes. The coupon plate for the tensile weld test and those for the guided cold bend tests shall be prepared in accordance with the requirements of SABS 719. The qualification tests shall be considered satisfactory if: a) The weld has a joint efficiency greater than 95% of the minimum specified tensile

strength of the parent metal and, b) the bend test specimens are capable of being bent around a former with a

diameter equal to six times the nominal thickness of the plate to an angle of 180 degrees without developing a crack, except at the arises of the specimen, of length or width greater than 3 mm.

Failure to pass the above qualification tests shall result in the rejection of any pipes welded with the procedure used and the preparation of a new qualification of procedure test. Any changes in the electrode case type used or change of flux used shall require a qualification test before approval of the procedure is granted.

PSL 3.4.6 Radiographic Examination of Shop Welds

Add new Sub-Clause: The Contractor shall include in his prices for the supply of pipes, fittings and specials, the cost of carrying out, under the supervision of the inspector appointed by the Employer, examination of shop welds on the following basis :


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PSL 3.4.6.1 Pipes a) FIVE percent random radiographic examination of all welds deposited by an

approved automatic process. b) TEN percent random radiographic examination of all welds deposited manually or

semi-automatically, and repairs to welds done by an automatic process (should required repairs exceed 25% of the tests the percentage of examination shall be increased to TWENTY per cent).

PSL 3.4.6.2 Fittings and Specials

a) ONE HUNDRED percent radiographic examination of all welds deposited

manually or semi-automatically in specials and fittings which cannot be hydraulically tested.

b) TEN percent radiographic examination of all welds deposited manually or semi-

automatically in specials and fittings which are to be tested hydraulically. The Engineer shall in all cases determine which welds are to be radiographed on the quantity basis specified above. All radiographs and records thereof made by the Contractor shall be made available to the Engineer to enable him to determine whether the welds are acceptable or not and no lining or wrapping of pipes shall be permitted until the welds have been accepted by the Engineer. To avoid unnecessary delay, at the option of the manufacturer, radiographs may be approved by the manufacturer's inspectors subject to them being subsequently approved by the Engineer. When a section of the weld is shown by radiography to be unacceptable and if the limits of the deficient weld are not defined by the radiograph, additional radiography shall be carried out at the Contractor's expense until the limits of the deficiency are determined. Repairs shall be made to defective welds at the Contractor's expense. All repair welds shall be identified with a stamp marking, indicating which welder conducted the repair. All repaired welds shall be radiographed at the Contractor's expense but after any repair welder has had ten consecutive repairs approved, the extent of the radiography of the repairs conducted by that welder may be decreased by agreement between the Engineer and the Contractor.

PSL 3.4.7 Production Testing of Welds

Add new Sub-Clause: The Contractor shall include in his prices for the supply of pipes, the cost of carrying out at the factory, non-destructive tests of shop production welds (additional to the qualification tests for welding procedure) on the following basis :- One pipe from each one hundred pipes produced shall be selected at random and specimens for two guided cold bend tests and one transverse tensile test shall be cut therefrom and tested in accordance with SABS 719, Section 7. In the case of the guided cold bend tests, where welding is carried out from one side only, bend specimens shall be tested with the rest of the bend in tension; where welded from both sides the specimens shall be tested with the inner and outer welds in tension alternately. Tensile tests shall be carried out as for the qualification tests. The pipes from which successfully tested specimens have been taken shall be trimmed to the maximum possible length and shall be accepted by the Employer for payment purposes as full standard pipe lengths. In the event of the welds of any pipe failing to reach the standard of acceptance, such pipe shall be rejected. Two further plate coupons shall be prepared from different pipes,


C3 -64

selected at random by the Engineer, for each specimen that has failed to reach the required standard. In the event of such additional tests proving to be satisfactory repairs to the pipe originally failing any test will be permitted by the Engineer and such repairs and subsequent re-test shall be at the Contractor's expense. In the event of the additional tests also failing to reach the required standard, the Engineer shall have the right to reject the entire batch of pipes from which the coupon plates were cut.

PSL 3.7.2 Polyethylene Pipes

Add to the Sub-Clause: HDPE and LDPE pipes shall be of the classes scheduled. Jointing of pipes shall be by means of welding, by bolting up welded-on flanges or by the use of approved external compression type fittings (Plasson or similar approved).

PSL 3.7.3 Concrete Non Pressure Pipes

Add new Sub-Clause: Concrete non-pressure pipes shall conform to SABS 677 for Class 50D and 75D pipes with ogee joints, and be in standard lengths of 2,44 m.

PSL 3.7.4 Glass Reinforced Polyester pipes and fittings

Glass reinforced polyester pipes and fittings shall conform to ASTM D3754 and AWWA C950 fibre glass pressure pipes. The pipes and fittings shall be of stiffness class 5000 N/m² unless otherwise specified.

PSL 3.8 Jointing Materials PSL 3.8.2.1 Flexible Couplings

Delete the Sub-Clause and substitute the following: Flexible couplings shall conform generally to Clause 15 of BS 534 for slip-on type steel couplings and shall be of approved manufacture. They shall not be provided with a central register, except where called for to the contrary in the Schedule of Quantities. They shall be capable of being tightened and released without damaging or improperly distorting the rubber seating rings and shall be designed to prevent the rubber rings being blown out under pressure or sucked in under vacuum. The steel used shall conform to the appropriate British Standard Specification and each coupling is to be capable of withstanding the test pressure applicable to the pipes with which they are to be used without exceeding a stress in the steel of 67% of the yield point.

PSL 3.8.3 Flanges

Add to the Sub-Clause: The sizes and drilling of flanges shall generally comply with BS 4504 :1989 : PN 16 or PN10 for working pressures of 1 600 and 1 000 kPa respectively, as called for in the Schedule of Quantities. However, higher pressures may be scheduled in which case PN25 flanges shall be used. Where low pressure interconnecting pipework for working pressures up to 1 000 kPa is being supplied and installed, the fourth line of the Sub-Clause shall be deemed to read "BS4504 : 1989, PN10 except that" Flanges cut from steel plate shall be machined flat on the front face, ie without a raised joint. No machining need be carried out on the back face


C3 -65

provided that face is sufficiently flat to ensure square bedding of the bolt heads and nuts and provided that all weld reinforcement is removed. Cast or forged flanges shall be machined flat on the front faces and either spot faced at the bolt holes, or fully machined, on the back faces. Spot facing shall be at least 3 mm greater in diameter than the washers to be used, shall be truly parallel to the front face and the distance between the two faces shall be not less than the specified flange thickness.

PSL 3.8.3.1 Flange Jointing Material

Add new Sub-Clause: Flange jointing material, when installed in the completed pipeline, shall be capable of withstanding transient pressures up to the specified field test pressure. Under this condition no damage shall be caused to the jointing materials or leakage occur through the joint. Bolts and nuts shall comply with SABS 135.

PSL 3.9 Corrosion Protection PSL 3.9.2.2 Steel Pipes, Fittings and Specials Over 150 NB

Mild steel pipes, fittings and specials shall be corrosion protection as specified; Internal and external Protection: Three coats of a low solvent, high solids, polyamine/amide cured, epoxy (twin pack) to a minimum thickness of 350 µm. Notes:

• The coating shall undergo holiday detection over the full surface in accordance with SABS 1217. This test shall be done by an inspector holding an appropriate qualification from either the CISA, the SAIW or the SAQCC.

• When applied to hot-dip galvanized surfaces, a suitable epoxy primer shall be used after careful surface preparation before applying this system.

• This system shall be applied by a specialist applicator prior to delivery to site with particular attention to the required interval between coats.

• The first and third coats shall be a different colour to the second coat.

Any method and material for repair to the internal and external protective coating due to welding, or any other damage, will comply with the manufacturers specifications. When steel couplings, flanges etc are part of a buried pipeline the couplings, flanges, etc shall be enclosed with "Denso mastic" to a smooth finish, wrapped with "Denso tape" and then wrapped with a polythene sheet which is strapped in place. If the operating temperature is likely to exceed 70ºC the Denso paste and tape shall be replaced with a suitable grease or a suitable sealer. The Contractor shall cover the cost for the protection system required in his rates as no extra payment for it will be scheduled.

PSL 3.10 Valves

Delete the Sub-Clause and substitute: Valves supplied under this Contract shall comply with the requirements of Particular Specification PE as applicable.


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PSL 3.11 Manholes and Surface Boxes

PSL 3.11.1 Bricks

Delete the first sentence and substitute: Bricks for manholes and surface boxes shall be engineering bricks type NFXE21 or better, with a water absorption not exceeding 7% and complying with the applicable requirements of SABS 227.

PSL 3.11.5.1 Manhole Covers

Delete the Sub-Clause and substitute: Manhole covers shall comply with SABS 558 for the types shown on the drawings and/or the Schedule of Quantities.

PSL 3.11.7 Sand

Add new Sub-Clause: Sand used for mortar (general purpose) and for plaster (external) shall comply with the applicable requirements of SABS 1090.

PSL 3.11.8 Cement

Add new Sub-Clause: Subject to the provisions of SABS 1200G clause 3.2.2 cement shall comply with the requirements of SABS EN 197-1 or CEM1 42,5.

PSL 4 PLANT PSL 4.4 Packing

Add new Sub-Clause: Goods should be suitably packed in such manner as will ensure safe and efficient transport to site, and the Contractor shall include in his prices for whatever packing may be necessary in this respect. Small items particularly liable to damage or loss in transit should be crated. All crates and packing material shall, after use, become the property of the Employer unless distinctly specified otherwise, or if returnable, shall be so at the Contractor's expense.

PSL 4.5 Protection of Linings during Transportation

Add new Sub-Clause: The ends of every pipe, fitting and special shall be fitted with suitable end closures as a precautionary measure against damage being caused to the lining material or coating. The end closures shall be capable of preventing the ingress of dirt but at the same time allowing air to ventilate through the pipework which they protect. They shall be secured in such manner that they cannot be dislodged or damaged by normal pipe handling operations.


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PSL 4.6 Marking

Add new Sub-Clause: a) Each pipe fitting, special, coupling and valve shall bear the Contract Number

followed by the Item Number given by the Engineer and a Despatch Number allocated consecutively by the manufacturer.

b) Closure pipes (trued for diameter throughout their length) shall, in addition to the

marking required above, carry two longitudinal brown stripes, 50 mm wide, diametrically opposite to each other and extending the full length of the pipe.

c) Every bend shall be marked as stated above and, in addition, shall have its

deflection angle in degrees and minutes painted on the outer surface. d) Packaged items such as nuts and bolts, insertion rings etc shall be marked with a

metal label bearing the Contract Number and the Item Number(s) with which they are to be used.

PSL 4.7 Advice Notes and Invoices

Add new Sub-Clause: The Contractor shall submit one copy of every advice note in respect of each individual consignment, quoting the Contract Number, the truck or vehicle number, item numbers and brief description of the articles so consigned. The advice note shall be lodged with the Engineer's Representative on Site at least two days before the arrival of the goods.

PSL 4.8 Delivery and Acceptance

Add new Sub-Clause: The material to be supplied under this Contract shall be consigned and delivered to approved areas adjacent to the pipeline route, or to an approved storage area if not required for immediate use.

PSL 5 CONSTRUCTION PSL 5.1 Laying

PSL 5.1.1 General


PSL 5.1.1.1 Acceptance and Storage of Pipework Items

The Contractor will be responsible for clearing the areas required for pipe storage which shall include the removal of rock, stones and all burnable material. He shall also be responsible for maintaining the area in a clean and tidy condition for the duration of the Contract. No separate payment will be made for this operation. Upon delivery of the pipes, fittings, specials and valves, they will be inspected jointly by the Engineer's Representative and the Contractor. Any pipes, etc, found to be damaged shall be returned to the factory for repair or replacement; in which case the costs of additional transport, repair or replacement shall be borne by the Contractor. The Contractor will be held fully responsible for the care and safety of all pipes and fittings, etc, on site, and shall bear the cost of all renewals which may be necessary to make good losses, damages or breakages. Furthermore, he shall be fully responsible


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for handling and re-loading material at the storage areas and for transporting and offloading all such materials at their correct places along the pipeline route.

PSL 5.1.1.2 Distribution of Material

Before commencing pipelaying, the Contractor shall properly distribute pipes, fittings and specials, along the trenches. Valves and couplings shall not be distributed until they are actually required for laying in their designated positions.

PSL 5.1.1.3 Pipelaying Personnel

The laying of all pipework items shall be performed only by qualified persons who are registered by the local authority as artisans in the plumbing, pipefitting or drainlaying trades or who are qualified by reason of having attended and passed the course on pipelaying held by the Civil Engineering Industry Training Board.

PSL 5.1.2 Damage

Add to the Sub-Clause: The Contractor shall be responsible for protecting pipes etc from grass fires at all times. He shall keep grass cut short in the vicinity of all unlaid pipework items.

PSL 5.1.4 Depths and Cover

Delete Sub-Clause 5.1.4.1 and substitute the following: Unless otherwise shown on the drawings or scheduled in the Schedule of Quantities or ordered, the depth of excavation for trenches for medium-pressure pipelines shall be such that the cover to finished ground level over the laid pipe shall not exceed 1,0 m. Delete from the third and fourth lines of Sub-Clause 5.1.4.2;

"e.g. the deflection shall not exceed 1,5° per joint in the case of AC pipes"

PSL 5.1.5 Inundation of Pipe Trenches and Floating of Pipes

Add New Sub Clause: Should trenches be inundated by water, there is a risk of movement of the pipes by flotation. The Contractor shall ensure that trenches are not flooded by stormwater and that pipes laid in the trench are backfilled as soon as possible after laying, except at joints made with couplings or flanges which must be kept visible until the pipeline has been satisfactorily tested. Welded joints may, after all specified testing has been satisfactorily completed and with prior approval from the Engineer, be backfilled at the same time as backfilling the pipeline. Should movement of the pipes occur, the Contractor shall remove the pipes from the trench and thoroughly clean and relay the pipes on bedding repaired or replaced as necessary. This work shall be carried out at the Contractor's expense.


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PSL 5.2 Jointing Methods

PSL 5.2.2 Flanged Joints

Add to the Sub-Clause: Before being brought together, the ends of the pipes, fittings, couplings and all flanges are to be inspected and cleaned to ensure that all parts forming the joint are undamaged and clean. When jointing flanges after cleaning, approved jointing material, cut properly to size, is to be inserted immediately before bringing the two flanges together. Before closing the joints, the flanges must be parallel to each other, with all bolts inserted in the bolt holes. After the fittings have thus been aligned and well supported, the joint shall be bolted up to a uniform tightness around the periphery.

PSL 5.2.3 Site Welded Joints

Add to the Sub-Clause: Plain ended steel pipes and the plain ends of corresponding specials are to be joined together by welding in accordance with American Standard API 1104. The pipe ends are to be prepared in accordance with that Standard. Welding shall generally commence at the top of the joint and proceed downwards. In addition to the root weld, at least two further passes shall be made, none of which is to exceed 3 mm in depth. The Engineer shall have the right to specify that Qualification Tests be carried out for each welder employed on the works. No welder shall be employed who has not passed such tests and for whom a recent pass certificate issued by a competent authority cannot be produced. TEN percent of field welded joints are to be tested by radiographic examination or some other approved method in accordance with Sub-Clause 7.2.2. The Engineer will make the necessary arrangements for such tests to be carried out by an inspection firm employed by the Employer. After jointing and testing, the protective lining and wrappings are to be rendered continuous with the same materials as applied to the body of the pipe. Holiday detection tests shall be carried out in the field to ensure continuity of lining and wrapping. The prices tendered for pipelaying are to include for any of the above work which may be entailed apart from inspections carried out by the Employer as per Sub-Clause 7.2.2.

PSL 5.2.4 Concrete Spigot and Socket Pipelines

Delete the first five lines of the Sub-Clause and substitute: Where rubber joint sealing gaskets are required as flexible joints in a concrete pipeline, the applicable requirements of SABS 676 (or SABS 677) for the type of joint recommended by the approved manufacturer shall be used for making the joint.

PSL 5.2.5 Flexible Coupling Joints

Add new Sub-Clause: Where ordered, steel flexible couplings are to be of a superior quality, approved type, each comprising one centre collar, two special flanges, two rubber rings and mild steel bolts. Adapter couplings shall be of a similar design, but one end shall be flanged to enable connection of plain ended pipes to flanged specials.


C3 -70

Steel couplings shall be assembled strictly in accordance with the manufacturer's instructions. In the event of the coupling collar having an internal central ring of register, the pipes shall be brought together until both pipe ends are in contact with the register, after which one pipe shall then be drawn back by 6 mm. Where the coupling has no internal register a 6 mm joint gap shall be central within the coupling.

PSL 5.2.6 Cut Pipes

Cut pipes may be used where required as closure lengths. The cut ends shall be dressed square and to a smooth even finish which shall not be inferior to that of the ends of uncut pipes. The finished dimensions of ends cut at Site must be within the tolerances applicable to the ends of the particular types of pipe to be laid. The cost of cutting and trimming pipes shall be included in the rates tendered for laying and jointing pipes. In addition GRP pipes shall be cut, bevelled and sealed strictly in accordance with manufacturers instructions

PSL 5.3 Setting Valves, Specials and Fittings

Add to the Sub-Clause: Valves are to be set correctly in the positions indicated and supported on concrete stools, except where not so required by the Engineer. Valve spindle guide brackets and stays where provided shall be secured into position against concrete work and set and carefully adjusted in order to give true vertical alignment of the spindle.

PSL 5.4 Concrete Casing

In the first and second lines delete "a strength 15 MPa/37,5 mm or such other strength as scheduled" and substitute "concrete grade 20/19".

PSL 5.5 Anchor/Thrust Blocks and Pedestals

In the fourth line delete "15 MPa/37,5 mm" and substitute "20/19"

PSL 5.6.1/2 Valve and Hydrant Chambers

Delete the references to drawings L1, L2 and L3 and substitute "the tender drawings".

PSL 5.7.1/2 Manholes

Add to the Sub-Clauses: Drawings showing details of the manholes are included with this tender document.


C3 -71

PSL 5.8 Brickwork in Chambers and Manholes Delete the eleventh line and substitute the following: Mortar for brickwork and plasterwork shall be composed of one part of cement to four parts of sand. Twelfth and thirteenth lines to be deleted. Add to the Sub-Clause: Plaster is to be applied in one coat not less than 12 mm in thickness.

PSL 5.10 Disinfection of Potable Water Pipelines Add to the Sub-Clause: Disinfection shall be carried out by the Contractor until tests carried out indicate that the water main has been adequately disinfected to achieve the residual chlorine standard normally adopted by the Employer.

PSL 6 TOLERANCES PSL 6.2 Control Points

In the third line delete "+ 100 mm" and substitute "+ 50 mm"

PSL 6.3 Alignment (Plan and Level)

In the third line delete "+ 100 mm or + 20%" and substitute "+ 50 mm or + 10%". In the fourth line delete "+ 20 mm" and substitute "+ 10 mm". In the sixth line delete "+ 50 mm or + 10%" and substitute "+ 25 mm or + 5%"

PSL 7 TESTING

PSL 7.2.2 Radiographic Examination

Add to the end of the Sub-Clause the words "as amended".

PSL 7.2.2 Radiographic Testing in the Field

Add new Sub-Clause: 10% of all welds made in the field shall be tested radiographically by an independent specialist firm. The welds to be tested shall be selected by the Engineer or his representative. The standard of acceptance shall be in accordance with API Standard 1104. Should the welds so tested prove to be unacceptable, they shall be repaired by the Contractor and retested. In addition the two nearest untested welds, one on each side of the unacceptable weld shall also be tested radiographically. Should these welds also prove to be unsatisfactory, two further welds shall be tested. Such testing will be repeated until all welds are found to be acceptable. The cost of testing up to a maximum of 12% of all field welds will be borne by the Employer, but the costs of testing and retesting over and above that percentage shall be borne by the Contractor.


C3 -72

PSL 7.3 Standard Hydraulic Pipe Test

PSL 7.3.1 Test Pressure and Time of Test

Delete second line of Sub-Clause 7.3.1.1 and substitute the following: attained the strength specified in terms of Sub-Clause 5.5.

PSL 7.3.1.2 Delete this Sub-Clause PSL 7.3.1.3 Delete the Sub-Clause and substitute the following:

The field test pressure applied to any section of the pipeline under test, taking differences in elevation along the pipeline into account, shall be such that the pressure at any point along the section under test shall not exceed the appropriate of the values set out in Sub-Clause 7.3.1.4 and that the minimum pressure shall be not less than the design (working) pressure.

PSL 7.3.3 Permissible Leakage Rates

Delete the title of Sub-Clause and substitute the following: Permissible Make-up Water

Add to the Sub-Clause: c) Concrete Pipes

0,40 x diameter of pipes in millimetres

x length of test section in kilometres x square root of the test pressure in megapascals"

PSL 8 MEASUREMENT AND PAYMENT PSL 8.2.1 Supply, Lay and Bed Pipes Complete with Couplings

Delete the fourth and fifth lines and substitute the following: the handling, inspecting, transporting, forming joint holes, bedding, laying, jointing, cutting, testing and, when relevant, disinfecting of the pipes and the joints. See Clause 8.2.4 regarding extra-over costs for cut pipes where applicable.

PSL 8.2.11 Anchor/Thrust Blocks and Pedestals

Delete the last line and substitute the following: formwork, concrete, reinforcement (if any), and screeding to top surfaces.

PSL 8.2.16 Continuity Bonding at Joints

Add new Sub Clause: Extra over payment for electrical continuity bonding and repair of pipe coating will be made per joint completed as specified. Each joint bonding comprises two copper cables fastened with eight thermite welds and all necessary repairs to damaged pipe coatings.

Unit : No


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PSLB : BEDDING (PIPES) (Applicable to SABS 1200 LB - 1983) PSLB 2 INTERPRETATIONS

PSLB 2.3 Definitions

Main Fill Delete "150 mm" in second line and substitute "300 mm".

PSLB 3 MATERIALS

PSLB 3.1 Selected Granular Material

Delete the Sub-Clause and substitute: SELECTED GRANULAR MATERIAL. Selected granular material shall be a granular material with a PI not exceeding 10, grading modulus not less than 1.2, free from lumps or stones retained on a 19 mm sieve and having a compactibility factor (as determined by the test given in Section LB of Part 3 of SABS 0120) not exceeding 0,4.

PSLB 3.2 Selected Fill Material

Delete the wording of this Sub-Clause and substitute: SELECTED FILL MATERIAL. Selected fill material shall be material with PI not exceeding 12 and that is free from vegetation and from lumps or stones of diameter exceeding 30 mm.

PSLB 3.3 Bedding

Add to the Sub-Clause: All pipes laid under this Contract will be considered as being rigid pipes and the bedding shall be of Class A, B or C (Drawing LB-1) as applicable and scheduled except that joint holes (pockets) shall be provided in the bedding, as per Drawing LB-2, at each pipe joint and coupling. No sharp-edged stones shall be allowed to come into contact with either the pipes or the couplings (joints). No extra payment will be made for forming joint holes (pockets).

PSLB 3.4 Selection

PSLB 3.4.1 Suitable Material Available from Trench Excavation

Add to the Sub-Clause: Notwithstanding the foregoing, if, in the opinion of the Engineer bedding material can be produced from the excavated material and if ordered by the Engineer, the Contractor shall screen the excavated material in order to produce material suitable for bedding.


C3 -74

PSLB 5 CONSTRUCTION PSLB 5.1 General

Add to the Sub-Clause: The pipeline is to be laid on the class C bedding except where indicated otherwise in the Schedule of Quantities.

PSLB 5.2 Placing and Compacting Rigid Pipes

PSLB 5.2.1 Class 'A' Bedding

Delete the first sentence of 5.2.1(a) and substitute the following: The pipes shall be supported on a continuous cradle of grade 20/19 concrete.

PSLB 5.2.2 Class B and C Beddings

Delete the third, fourth and portion of the fifth lines up to the words "as relevant" and substitute the following: The pipes shall be bedded on a continuous mound of selected granular material in the manner shown on Dwg LB-3(b) or (c) as relevant. The remainder of the bedding shall be placed in layers under the overhang and up the sides of the pipe, each layer being compacted until levels are reached as shown on Dwg LB-1(a) or (c) as relevant.

PSLB 5.2.5 Stone Bedding

Add new Sub-Clause: Where ordered by the Engineer, special drains consisting of a 150 mm thickness (See PSDB 5.1.2.2) of 6 mm to 20 mm graded stone extending the full width of the trench shall be provided below the bedding to the pipes. The excavation for these drains will be measured in cubic metres at the contract rate applying to unsuitable excavation below the bottom of the trench. The stone filling will be paid for per cubic metre. All measurements in this connection will be to a width equal to the base widths and depths ordered.

PSLB 5.3(b) Selected Fill Blanket

Delete "200 mm" from title.

PSLB 5.4 Concrete Casing to Pipes

Add to the Sub-Clause: Where concrete casing is ordered by the Engineer it is to be of grade 20/19 concrete with a minimum thickness of 150 mm above the top of the pipe.

PSLB 5.5 Soilcrete

Add new Sub Clause: Where ordered by the Engineer or where shown on the drawings, pipes shall be backfilled using soilcrete. Soilcrete shall consist of an approved soil or gravel mixed with 5% by weight of cement and only sufficient water to give it a consistency that will permit the soilcrete to be placed, using vibrators, tampers and other approved methods, in such a way that all voids between pipes and sides of excavations and between pipes in the case of multiple installations, are properly filled. The height to which the soilcrete


C3 -75

backfill shall be taken shall be as determined by the Engineer or as shown on the drawings. The aggregate used for soilcrete shall preferably be a sandy material but may contain larger particles up to 38 mm and it shall have a plasticity index of not more than 10. Detrimental percentages of silt or clay must be avoided and the aggregate shall be obtained from an approved source. The soilcrete shall be mixed on site using suitable concrete mixers and water and cement contents shall be carefully controlled. The material shall be placed and then thoroughly compacted by means of concrete vibrators, tampers or other approved methods, so that all voids are filled as described above. Stones shall be packed at the pipe ends to prevent the soilcrete from flowing outside the required limits.

PSLB 6 TOLERANCES PSLB 6.1 Moisture Content and Density

Add to the Sub-Clause: The permissible deviations applicable are to be those for Degree of Accuracy II class of work.

PSLB 8 MEASUREMENT AND PAYMENT

PSLB 8.1.3 Volume of Bedding Materials

Add to the Sub-Clause: c) The volume of bedding material shall be measured net i.e. the volume of the pipe

is to be deducted. PSLB 8.2.1 Provision of Bedding from Trench Excavation

Delete the Sub-Clause and substitute: No payment will be made for the provision of bedding materials which complies with the specification where such material is available from trench excavations within 15 m of the point where it is required. Provide bedding without the need for screening: a) Selected granular material Unit : m³ b) Selected fill material Unit : m³ The rates shall cover the cost of acquiring, from any point as may be selected by the Engineers beyond 15 m but within 2,0 km, bedding that complies with the relevant requirements of the specification, or which after screening will comply with the specification, of delivering it to points alongside the trench spaced to suit the Contractor's methods of working, of making good any backfill deficiency from points where backfill has been acquired, and of disposing of displaced material within the freehaul material. The freehaul distance for transporting bedding materials and for disposal of surplus material shall be 2,0 km.

PSLB 8.2.1.1 Screening Material for Bedding

Add the following Sub-Clause:


C3 -76

Screening material for bedding: a) Selected granular material Unit: m³ b) Selected fill material Unit: m³ The rates for screening shall cover the extra-over cost for screening (where so ordered by the Engineer) material obtained and paid for in accordance with PSL 8.2.1 above in order to obtain bedding material as specified.

PSLB 8.2.4 Encasing of Pipes in Concrete

Delete the words "4 m centres" and substitute "2,4 m centres along the length of the pipeline, or, if instructed by the Engineer, on either side of collars, couplings, joints, etc."

PSLB 8.2.5 Overhaul of Material for Bedding Cradle and Selected Fill Blanket

The area of the Works is to be a freehaul area.

PSLB 8.2.6 Soilcrete Unit : m³

The volume will be computed from the dimensions on the drawing or ordered by the Engineer. The rate shall cover the cost of dealing with any excavations (in all materials including disposal of surplus) that is additional to that measured under the item for pipe trench excavation and the cost of backfilling the trench in soilcrete.


C3 -77

PSLC : CABLE DUCTS

(Applicable to SABS 1200 LC - 1981)

PSLC 2 INTERPRETATIONS

PSLC 2.4 Abbreviations

Delete the words "GPO : Department of Post and Telecommunications" and insert the words "Telkom : Telkom SA Limited".

PSLC 3 MATERIALS PSLC 3.1 Ducts

Add the following: The Contractor shall use the materials supplied to him by Telkom in the most economical manner. Materials lost or damaged through neglect on the part of the Contractor or his workmen shall be made good by the Contractor or the value thereof will be deducted from any monies due to him. The Contractor shall cart all materials supplied by Telkom to the place of work and shall, on completion of the work, return all surplus material to Telkom.

PSLC 3.1(e) Split UPVC Pipes

Add new Sub-Paragraph: e) Split pipes shall only be used to provide ducts for existing services which cannot

be severed or threaded through the ducts. The pipes shall be accurately cut in the middle and opposite halves shall be matched as sawn. Split pipes shall be placed around the service, firmly bound by stainless steel straps, and finally backfilled or encased in concrete as required by the drawings.

PSLC 3.2.1 Bedding for Electricity Supply Cable Ducts

Delete from the second line "PI not exceeding 6" and substitute "PI not exceeding 12".

PSLC 3.2.2 Bedding for Telephone Cable Ducts

Delete from the second line: "or crusher run graded from 13,2 mm to dust."

PSLC 3.3 Backfill

Delete the wording of this Sub-Clause and substitute: Material to be used for backfill shall be sub-base quality material complying with the requirements of Clause 3.2.1 of SABS 1200 ME, and shall be compacted to a minimum of 90% of modified AASHTO density. At road crossings the ducts shall be encased in concrete or in soilcrete as specified in PSLB 5.5 or as instructed by the Engineer.


C3 -78

PSLC 3.4 Cable Duct Markers Notwithstanding the provisions of the Sub-Clause, telephone cable duct markers shall be as detailed on the drawings. The rates shall be held to cover for the supply, additional excavation, installation including tying to draw wires and backfilling.

PSLC 3.5 Materials Provided by Telkom

Add new Sub-Clause: When material, such as 100 mm dia. pitch-fibre pipes, 2,50 mm dia. copper screening wire and 3,05 mm dia. galvanized iron draw wire is supplied and delivered, free of charge to site by Telkom it will be done so against a receipt signed by a responsible representative of the Contractor. The Contractor shall inform the official of Telkom delegated to handle this matter at least two weeks prior to the date on which pipes are required. The Contractor shall use materials supplied to him in the most economical manner possible. Materials lost or damaged through neglect or accident on the part of the Contractor or his workmen shall be replaced by the Contractor at his own expense. All materials and equipment handed to the Contractor shall be insured against damage or loss as stipulated under Clause 35 of the General Conditions of Contract, 1st Edition, 2004. The Contractor shall on completion of the work, deliver any surplus material which has been issued to him, to the nearest Telkom engineering yard.

PSLC 5 CONSTRUCTION

PSLC 5.1.1 Trench Widths and Depths

Delete Sub-Paragraph 5.1.1.2(a) and substitute: a) "The trenches in which ducts are to be laid shall have a depth sufficient to provide

a minimum cover of 600 mm between the top of the uppermost duct and the finished road surface level. Where this depth cannot be maintained owing to the nature of the ground, the depth may be varied at the discretion of the Telkom Engineer. In all cases where a duct has less cover than 600 mm it shall be covered by means of precast concrete slabs having a minimum thickness of 50 mm and a width equal to 400 mm plus the diameter of the duct it protects, except where otherwise directed by the Telkom Engineer. The concrete slabs shall be provided by the Contractor."

PSLC 5.3.1 Straight Laying

Add to the Sub-Clause: "The base of the trench shall slope in order that water may drain from the ducts. The longitudinal gradient of the bottom of the trench shall be at least 75 mm per 30 m of cable duct run."


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PSLC 5.3.3 Draw Wire Add to Sub-Clause: "A length of 3,05 mm dia. galvanized iron wire (supplied by Telkom) shall be attached to the cleaning brush end and drawn into the duct and left in place for use as a draw wire. A surplus length of wire, at least 2 m neatly coiled, shall be left at each end of each length of ducting. All open pipe ends must be plugged to prevent the ingress of dirt."

PSLC 5.3.5 Jointing of Pitch-Fibre Pipes (Compulsory for Telkom Ducts)

Add new Sub-Clause: Pitch-fibre pipes which have tapered ends shall be joined by the use of tapered socket couplings. The pipe end and the inner surface of the coupling shall be clean before the spigot is pushed into the socket. The end of the first pipe to be placed in a trench shall be butted firmly against a solid object to ensure that hammer blows applied to subsequent couplings will drive sockets firmly onto tapered pipe ends without causing displacement of previously laid cable ducting. Joints will be made by using a 1,8 kg hammer and a wood block (230 mm x 175 mm x 50 mm) held flush against the open end of the coupling. The end of the next pipe length shall be inserted into the coupling and a further coupling placed over its leading end. This pipe and coupling shall then be tapped home and the process repeated throughout the length of the line. In general, the pipe shall not enter further into the socket than 6 mm beyond hand tightness. The Contractor shall be responsible for any necessary cutting of pitch-fibre ducts to suit the requirements of the work. Pipes shall be cut to length using a sharp coarse-toothed saw. The Contractor shall re-machine and taper the cut ends of pitch-fibre pipes with an approved hand turning machine.

PSLC 5.3.6 Screening

Add new Sub-Clause Pipe runs shall be screened against electrical interference by copper wires with all joints made by soldering. The screen shall consist of two strands of 2,50 mm diameter copper wire, bound together by two turns of similar copper wire every 5 m. The binding shall be undertaken by the Contractor. The screen shall be placed approximately 200 mm above the duct, or the uppermost duct where there is more than one.

PSLC 5.6 Laying Of Cables With Other Services

Add to the Sub-Clause: "For telephone cables the following will apply: The trench shall be excavated in such a position that pipes can be laid at least 300 mm from any adjacent power cables. Where this is not possible, pipes shall be separated from power cables by concrete slabs or paving slabs placed vertically."

PSLC 5.7 Crossing of Telephone and Electricity Cable Ducts

Delete the second sentence of Sub-Clause and substitute:

"Where a duct will cross an existing service such as an electricity supply cable, a water supply pipe or a sewer, the telecommunication duct shall be laid with not less than 25 mm clearance above the other service. Where the depth of the existing service is


C3 -80

insufficient for this to be done, the telecommunication cable pipe shall be laid to pass with not less than 25 mm clearance below the other service.

PSLC 5.10 Positions to be Marked

Delete from the third line the words:

"... painted by means of an approved stencil with red paint"

and replace with:

"engraved by an approved method".

PSLC 7 TESTING

PSLC 7.1 Access for Engineer

Add the following to the Sub-Clause:

"The Telkom Engineer shall have free access to the site at all times. He shall have the power to inspect work under the Contract at any stage and may reject any part which has not been executed in an approved, substantial, workmanlike manner and in accordance with the specifications.

No ducts shall be covered before inspection and approval by the Telkom Engineer. Arrangements shall be made by telephoning the designated official at least 24 hours prior to the required inspection.

PSLC 7.4 Final Inspection

Add new Sub-Clause:

On completion of the work a final inspection will be undertaken. The Contractor shall at his own cost expose all ends of duct runs prior to final inspection of the ducts, after which the exposed ends shall be finally closed up.

PSLC 8 MEASUREMENT AND PAYMENT

PSLC 8.2.5 Supply, Lay, Bed and Prove Duct

Delete paragraphs a) and b) in their entirety and substitute:

a) For Telkom ducts, the cost of collecting all materials provided by the Telkom, the provision of any other necessary material, laying the ducts and screening wire, inserting the draw wire, jointing, bedding and proving, all as specified

and

b) for all other ducts, as for a) above but including the cost of provision of all materials by the Contractor".


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PSLD : SEWERS

(Applicable to SABS 1200 LD - 1982) PSLD 3 MATERIALS

PSLD 3.1.1 Vitrified Clay Pipes

Delete Sub-Clause 3.1.1.2 and substitute: Vitrified clay sewer pipes of either 100 or 150 mm diameter shall be Class 2 plain ended pipes having a crushing strength of at least 45 kN/m. Joints shall comprise natural rubber rings within polypropylene couplings.

PSLD 3.1.2 Reinforced Concrete Pipes

Add to the Sub-Clause: Class 50D and 75D SI type non-pressure spigot and socket sewer pipes (with sacrificial layer) jointed with rubber rings shall be supplied under this Contract.

PSLD 3.1.8 Glass Reinforced Polyester Pipes and Fittings

Add new Sub Clause: Glass reinforced polyester pipes and fittings shall conform to ASTM D3262 and ASTM 3754 and AWWA C950 fibre glass sewer pipes. The pipes and fittings shall be of stiffness class 5000 N/m² unless otherwise specified.

PSLD 3.4 Bedding

Add to the Sub-Clause: Bedding of sewers shall be of Class C Bed except where scheduled otherwise.

PSLD 3.5.1 Bricks

Add to the Sub-Clause: Cement bricks complying with SABS 1215 will also be deemed acceptable for the construction of the Works, and shall be manufactured to the following requirements : a) Units are to be solid b) The nominal dimensions:

Length 220 mm Width 110 mm Height 75 mm

c) The nominal compressive strength: 14MPa


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PSLD 3.5.2 Precast Concrete Sections Add to the Sub-Clause: Sectional spun concrete cylinders shall be manufactured from dolomitic aggregate. Joints between wall sections shall be sealed with an approved plasticised butyl rubber compound.

PSLD 3.5.6 Mortar

Delete the Sub-Clause and substitute the following: Mortar for brickwork and, where so ordered by the Engineer, for external plasterwork to manholes shall be composed of one part of cement to four parts of clean pit sand. Mortar for the internal plasterwork to manholes and to the benching within manholes shall be composed of one part of cement to three parts of dolomitic sand.

PSLD 3.5.8 Manhole Covers and Frames

Add to the first paragraph of the Sub-Clause: After installation all exposed portions of the CI cover and frame shall be thoroughly cleaned and painted with two coats of epoxy tar, particular attention being paid to the painting of the underside of the covers and frames. Precast concrete manhole covers and frames shall comply with the applicable requirements of SABS 1294 and to the details shown on the drawings. The precast concrete lid cover shall be so designed as to withstand a point load, as specified in Clause 8.7 of SABS 1294, in the centre of the lid of 50 kN for light duty covers and 100 kN for heavy duty covers.

PSLD 3.6 Marker Posts

Delete "Marker Posts" and substitute "Marker Blocks". A concrete marker block is to be provided to define the position of each sewer connection. It shall comprise a grade 20/19 concrete block, 300 x 300 x 300 mm deep, set into the ground in a position adjacent to the connection on the boundary and set off therefrom by a distance of 1,0 m in the two horizontal orthogonal directions, except where shown otherwise on the drawings. The surface of the block shall be set proud of the natural ground level by a height not exceeding 50 mm and it shall be trowelled to a smooth finish with a steel trowel and inscribed with two direction arrows and the depth of the connection in metres, correct to the nearest one-tenth of a metre. Precast or in-situ blocks may be provided. If the Contractor should elect to provide precast blocks, the rate allowed should include for bedding these in a sand layer 50 mm thick laid on the bottom of the excavation. Connection marker blocks are to be set on private property, except where site conditions dictate otherwise. In such cases the approval of the Engineer is to be obtained for an alternative position before the commencement of the relevant excavation. In all cases the position and inscription of the connection markers is to be checked by the Engineer prior to the backfilling of the trench. Connection marker blocks will be measured by number. The rate entered for marker blocks in the Schedule of Quantities will be held to include for all excavation, concrete work, shuttering, setting accurately in position , bedding in sand if relevant, accuracy of


C3 -83

recording depth, clarity of inscription and all labour, material and plant necessary to complete the work.

PSLD 5 CONSTRUCTION PSLD 5.1 Laying and Bedding

Add to the Sub-Clause: Notwithstanding the requirements of Sub-Clause 5.2, the Contractor shall, prior to the construction of any sewers, prepare and lay a trial section for inspection by the Engineer. The trial section shall be at least 30 m long and shall include at least two adjacent completed manholes and a property connection. Such trial section shall be approved by the Engineer before authority is granted to proceed with the laying of any further sections.

PSLD 5.4 Connections to Manholes

Add to the Sub-Clause: The rates tendered for the construction of manholes are to include for whatever additional costs there may be over and above the tendered rates for the supply, lay, joint, bed and test of the short lengths of pipes cast into the manhole walls.

PSLD 5.6.5 Precast Concrete Manholes

In the first sentence delete "Drawing LD-5" and substitute with "the drawings". Add to the Sub-Clause: Where sewers are laid before the relevant roads are constructed, all the manholes in the road reserve shall have three layers of spacer slabs. This will facilitate the lowering (or raising) of the manhole covers to suit the future roadway and sidewalk levels.

PSLD 5.7 Concrete Casing to Pipes

Add to the Sub-Clause: Where concrete casing is ordered by the Engineer, it is to be of grade 20/19 concrete with a minimum thickness of 150 mm above top of the pipe.

PSLD 5.9.1 Location and Details

Add to the Sub-Clause: Typical details of connecting sewers (house connections) are shown on the drawings accompanying this tender.

House connections shall be laid in 100 mm diameter piping. A 45° plain junction shall be built into the sewer at the point directed by the Engineer,

and the connection shall start from the branch of this junction with a 45° bend and be continued up to the boundary line of the property at such grade as may be directed by the Engineer, the branch of the junction and the bend tilted at the same grade. Where the trunk sewer is laid inside the erf boundary, an end cap is to be provided on the 100 mm diameter branch of the access junction and no additional 100 mm diameter pipes are to be laid for that particular erf connection. Where there is a difference in level between the invert of the main sewer and the private drain at the property line, the connection to the main sewer shall be made by means of a


C3 -84

ramp. If the difference in levels is less than 1,2 m an inclined ramp shall be built using

two 45° bends. If the difference in level is over 1,2 m a vertical ramp with a 45° junction and bend fixed at a suitable level to take the house connection, the vertical pipe being continued to within 450 mm of the ground surface and sealed with a stopper plug. In those cases where connections will be effected at manholes, a branch channel shall be formed in the manhole floor and the connection taken off therefrom. Where there is no difference in level between the house connection and the main sewer, the connection shall be continued to the property line in the same manner as described above but without the initial bend. Where there is a difference in level, a ramp shall be formed of the required height in the same manner as shown on the drawing. Each house connection shall be plugged off with a stopper plug.

PSLD 5.9.2 Marker Posts

Delete "Marker Posts" and substitute "Marker Blocks".

PSLD 5.9.3 Recording Location

Delete the last sentence and substitute: The records shall be handed to the Engineer, in a form acceptable to the Engineer, at the time when the Contractor claims payment for the relevant work.

PSLD 6 TOLERANCES PSLD 6.2 Overall Centre-line Control and Manhole Locations

In second line delete "+ 300 mm" and substitute "+ 150 mm".

PSLD 6.3 Manhole Invert-Levels

In second line delete "+ 50 mm" and substitute "+ 25 mm".

PSLD 7 TESTING

PSLD 7.1.4 Sub-Clause

Delete the Sub-clause and substitute the following: The sewer, and the house connections along its length, shall be tested simultaneously between manholes or chambers, as applicable. The house connections and the section of the sewer under test shall be suitably "plugged" at the open ends using plugs or stoppers which have been braced adequately.

PSLD 7.2.2 Water Test

Delete the Sub-Clause and substitute the following: The Water Test will not be acceptable under this Contract. Water tests may be accepted for pipelines > 400mm diameter provided the method proposed is approved by the Engineer.


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PSLD 7.2.6 Watertightness of Manholes

Add to the Sub-Clause: Wherever practicable, after each manhole has been inspected and approved by the Engineer, it is to be tested in his presence or in the presence of his authorised representative, in the following manner : All sewer inlets and outlets to and from the manhole shall be closed with expanding plugs or other apparatus. Water is then to be introduced into the manhole up to a level 25 mm below the underside of the roof slab. The water level is to be maintained for not less than one hour or such longer period as may be necessary to accurately record the rate of leakage, if any. Careful and accurate records shall be kept at frequent and regular intervals of the variation in the level of the water in the manhole and of the quantity of water added so that the rate of leakage may be properly determined. In the event of the rate of leakage exceeding 1,25 l per hour per metre of depth of manhole, or in the event of any weakness, defect or fracture or visible signs of leakage occurring in the manhole under test, the Engineer shall have the right to order the test to be discontinued. The Contractor shall thereupon, at his own expense, search for and rectify any weakness or defect in the manhole. Such work or rectification is to consist of repair or replacement or both. The manhole shall thereafter be refilled with water and retested in the manner specified. This process shall be repeated until a satisfactory test is obtained.

The Contractor will be paid for the hydraulic testing of manholes at the rate per manhole to be quoted by him in the Schedule of Quantities. The Contractor's prices for the hydraulic testing of manholes shall include for all arrangements for the supply of water for testing, the cost of water so used where the water is not obtained free of cost from the Employer, for any necessary rectification work and retesting and for all labour, plant and materials required to carry out the specified tests.

PSLD 8 MEASUREMENT AND PAYMENT PSLD 8.2.3 Manholes PSLD 8.2.4 Extra Over Item 8.2.3 for Back Drops, etc PSLD 8.2.5 Inspection Chambers

Delete the first and second lines and substitute the following : Separate items will be scheduled for manholes, backdrops and inspection chambers, etc. of each type and of each depth (measured from top of cover to invert) in increments of 0,5 m.


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PSLE : STORMWATER DRAINAGE

(Applicable to SABS 1200 LE-1982)

PSLE 3 MATERIALS

PSLE 3.1 a) Precast Concrete Pipes

Delete the Sub-Clause and substitute: Concrete pipes shall be of reinforced concrete and shall comply with SABS 677 and be of the class as indicated on the drawings or tabulated in the Schedule of Quantities. Unless otherwise indicated they shall have ogee joints

c) Portal and Rectangular Precast Concrete Culvert Units Add to the Sub-Clause: Design calculations shall be submitted to the Engineer for approval before precast culverts are manufactured.

d) Skewed Ends

Add to the Sub-Clause: Wherever required skew ends shall be cut on Site and an approved epoxy coating shall be applied to the cut ends immediately after cutting.

f) Pipes for Subsoil Drains

Add new Sub-Clause: Pipes for subsoil drains shall have the scheduled internal diameter, which shall not be less than 100 mm. The size of the perforations in perforated pipes shall in all cases be 8 mm +1,5 mm diameter and the number of perforations per metre shall not be less than 26 for 100 mm pipe and 52 for 150 mm pipe. Perforations shall be spaced in two rows for 100 mm pipes and four rows for 150 mm pipes, except where shown otherwise on the drawings. Slotted pipes shall have a slot width of 8 mm with a tolerance of 1,5 mm in width. The arrangement of slots shall be to the Engineer's approval but the total slot area shall not be less than specified above for perforations."

PSLE 3.4.1 Bricks

Add to the Sub-Clause: Cement bricks complying with the relevant requirements of SABS 1215 bricks shall be considered as being acceptable.


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PSLE 5.2.2 Pipe Culverts

Add to the Sub-Clause: The bedding for stormwater pipes shall be to the requirements for Class C bedding of SABS 1200 LB (Bedding).

PSLE 5.2.3 Concrete Casing of Pipelines

In second line of the Sub-Clause substitute "grade 15/19" for "mix 15".

PSLE 5.2.5 (c) Portal and Rectangular Culverts

In fifth line add "300 mm wide" between "blanket" and "placed". In the seventh line substitute "grade 10/38" for "mix 10".

PSLE 5.4.2 Portal and Rectangular Sections

In the sixth line of the Sub-Clause substitute "93%" for "90%".

PSLE 5.5.3 Plaster

Preface the Sub-Clause with the following sentence: All catchpits are to be constructed in brick and plastered internally. In fourth line substitute "wooden trowel" for "steel trowel".

PSLE 5.6 Culverts on Steep Gradients

In fourth line substitute "grade 10/38" for "mix 10" and in seventh line substitute "grade 15/19" for "mix 15".

PSLE 5.8 Open Drains

Add new Sub-Clause: Open drains are to be constructed to the details shown on the drawings, or as directed by the Engineer, to the correct line, level and cross-section. The material excavated from open drains is to be wasted to spoil. Measurement of open drain excavation shall be calculated from natural ground level or, in the case of drains within a road reserve, from the reduced level in the road excavation, and payment will be made on a rate per m3 basis irrespective of depth. The rate is to include for all work required to trim the drain(s) to the correct line and level.


C3 -88

PSLE 5.9 Stone Pitching Add new Sub-clause: Where ordered by the Engineer, open drains, stormwater outlets, etc., shall be pitched with stone. Stone for pitching shall be of good, sound, durable rock of good shape and face, with a minimum size of 100 x 100 x 75 mm deep. Before pitching is commenced, all slopes and surfaces to receive pitching shall be carefully trimmed and dressed to the correct lines and grades. The pitching stones are to be laid with joints broken as much as possible and are to be hammered solid into position to present a regular and uniform surface. All joints are to be grouted to their full depth in 4:1 sand/cement mortar. Payment for stone pitching will be made at a rate per unit finished area and the rate is to include for all trimming and dressing of the excavation, laying of the stones and grouting of the joints. Unit : m²

PSLE 5.10 Cutting of Pipes

Add new Sub-Clause: As far as is possible culvert lengths shall be such that pipe units need not be cut. Should any straight or skew cuts be necessary, such cutting will not be measured and paid for separately in terms of Sub-Clause 8.2.4 since all additional work required in cutting the pipes as well as the wasted pipe ends shall be regarded as being included in the payment for the supply, lay, joint, bed and test of the relevant pipe culverts, as per Sub-Clause 8.2.1.

PSLE 8 MEASUREMENT AND PAYMENT PSLE 8.2.1 Supply and Lay Concrete Pipe Culverts (Sub-Clause 8.2.1)

Delete the title of the Sub-Clause and substitute: Supply, Lay, Joint, Bed and Test Pipelines Add to the Sub-Clause: The bedding shall be Class C. Add to the Sub-Clause: The rates shall cover the cost of providing the pipes as well as the cost of laying, bedding, jointing, making connections into manholes and testing the pipeline.

PSLE 8.2.8 Supply and Install Manholes, Catchpits And The Like Unit : No Substitute LE 8.2.8 with the following:

The unit of measurement shall be the number of each, in the depth increments as scheduled, fully installed in accordance with the details shown on the drawings.

The rate shall cover the cost of excavating and backfilling with approved selected material from site borrow pits, stockpile or commercial sources, compacted to 93 % of MOD AASHTO density (100 % for sand), supplying and installing of all material accessories, inlet kerbs and the channel adjacent thereto as well as for the removal and spoil of all surplus material. The rate shall also include the connection of pipes to manholes, catchpits, etc. and of building pipes into the walls of such structures, but no for the cutting of skewed ends.

PSLE8.2.14 Supply And Install Subsurface Drains According To Drawings Unit : m The length shall be measurement on the centre line of the completed subsurface drain.


C3 -89

The rate shall cover the cost of supplying, transporting, off-loading and installing all materials as well as for cutting, wasting, overlapping and installing of the materials where applicable.

PSLE8.2.15 Connecting Pipelines To Manholes, Headwalls Etc Unit : No

The number is the number pipelines built in at new/existing manholes, headwalls or wingwalls.

The rate shall cover the cost of all labour, plant and materials necessary to connect the pipeline to manholes and/or kerb inlets, and making the structure watertight, all as shown on the drawings.


C3 -90

PSME : SUBBASE (Applicable to SABS 1200 ME - 1981) PSME 3 MATERIALS

PSME 3.2.1a Sub base Material

Delete the Sub-Clause and substitute: "The maximum dimension of coarse aggregate shall not exceed 63 mm."

PSMF : BASE (Applicable to SABS 1200 MF - 1981) PSMF 5 CONSTRUCTION

PSMF 5.4.1 Placing

Delete the Sub-Clause and substitute: "Before construction of the base is commenced, the Contractor shall ensure that the: a) Underlying layer on which the base is to be constructed complies with the

requirements of the Specification for that layer; and b) The kerbing and channelling shall have been completed and approved by the

Engineer. All cast in situ mountable kerbing, channelling, vehicle entrances, transitions, etc, shall have been laid for a period of at least 72 hours before construction of the base course is commenced." Where a nominal thickness exceeding 150 mm has been specified, the base shall be constructed in approximately equal layers not exceeding 150 mm each.

PSMF 5.4.4 Compaction

Delete paragraph 5.4.4.2 and substitute: "In the case of natural gravels compaction shall be to 98% of Modified AASHTO maximum density and in the case of graded crushed stone and graded crushed stone with fines to 86% of apparent density, or such other density as may be indicated in the Schedule of Quantities.


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PSMJ : SEGMENTED PAVING (Applicable to SABS 1200 MJ - 1984)

PSMJ 3 MATERIALS

PSMJ 3.1 Units

PSMJ 3.1.2 Class, Strength and Type

Add the following to this Sub-Clause: All specified strengths shall be at 28 days. Unless otherwise specified the strength of the units to be used on this contract shall be 25MPa at 28 days.

PSMJ 8 MEASUREMENT AND PAYMENT

PSMJ 8.1 Principles

Add the following: Measurement and payment shall distinguish between items that are to be carried out using conventional construction methods and items that are to be carried out using labour-intensive construction methods.

PSMJ 8.2 Scheduled Items

PSMJ 8.2.3 Cutting Units to Fit Edge Restraints

Delete the first sentence of the description of this item - no distinction shall be made between straight, raking or circular cuts.


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PSMK : KERBING AND CHANNELLING (Applicable to SABS 1200 MK - 1983)

PSMK 3 MATERIALS

PSMK 3.2.1 Precast Kerbing and Channelling

Add to the Sub-Clause "Notwithstanding anything to the contrary in the Specifications or in the Schedule of Quantities, all barrier kerbs and semi-barrier kerbs shall be precast kerbs except for curved kerbs where the radius is less than 1 m."

PSMK 3.9 Bedding Material

Delete the Sub-Clause and substitute : "The material on which the precast concrete kerbs and channels are bedded shall consist of a 1 to 8 cement sand mix, or 15 MPa concrete with 13 mm aggregate, where the layer is more than 30 mm thick."

PSMK 5 CONSTRUCTION

PSMK 5.1 Excavation and Bedding

Delete the first paragraph and substitute: "Kerbing and channelling shall be constructed on the completed road sub-base layers."

PSMK 5.2 Precast Concrete Kerbing and Channelling

Delete the last paragraph of this Sub-Clause and substitute: "After the grouting of kerb joints has been completed, the kerbs shall be backed with a well-punned 15MPa concrete backing to the dimensions as shown on the drawings. On curves of radius less than 20 metres, the concrete backing shall be continuous, but on straights and curves of radius greater than 20 metres, the concrete backing shall be placed in short lengths across the joints. The backing concrete shall extend a minimum of 150 mm in each direction from the kerb joints.

PSMK 5.4 Cast-in-Situ Concrete Kerbing and Channelling

Delete the second sentence of the first paragraph of Sub-Clause 5.4 and substitute: "The lengths of sections of kerbing between joints shall be uniform throughout and shall not exceed 2 m except where shorter sections are necessary for closures or where otherwise shown on the drawings or required by the Engineer. In the case of cast-in-situ channelling constructed against precast kerbing, the joints in the channelling shall be constructed opposite the centre of every second length of precast kerbing. Joints shall be cut immediately after placing of the concrete."


C3 -93

PSMK 5.8.3 Machine Placed (Extruded) Kerbing and Channelling Delete the words "500 mm beyond ........ as relevant" in the first paragraph of this Sub-Clause and substitute: "150 mm beyond the back face of the kerb or edging strip."

PSMK 5.13 Sequence of Construction

Before construction of the segmented paving is commenced, the Contractor shall ensure that the kerbing has been completed, complies with the requirements of the Specifications covering kerbing and has been approved by the Engineer.

PSMK 8 MEASUREMENT AND PAYMENT

PSMK 8.2.1 Concrete Kerbing and Concrete Edge Beams

Delete Sub-Clause 8.2.1(b) and substitute: "b) The unit rate for precast kerbing and edge beams shall cover the cost of supply of

all materials, bedding and backing, and for all labour for bedding, jointing, backing, excavating, compacting, testing in terms of Sub-Clause 7.2, together with all backfilling, compacting and removing of excess material."

PSMM : ANCILLARY ROADWORKS (Applicable to SABS 1200 MM - 1984) PSMM 5 CONSTRUCTION PSMM 5.2 Road Signs

PSMM 5.2.4 Erection of Road Signs

PSMM 5.2.4.1 Excavation and Backfilling

Add the following to the end of the Sub-Clause : "Notwithstanding anything to the contrary in this specification or the Schedule of Quantities, the excavation for the installation of Statutory Road Signs shall be a minimum of 600 x 600 x 600 mm deep, which void shall be completely filled with grade 20MPa concrete."

PSMM 5.2.4.2 Erection

Add the following at the end of the first paragraph of this Sub-Clause: "After tightening, all nuts shall be spot welded to the bolts, the welded area thoroughly wire brushed and coated with an approved coating to prevent corrosion”.


C3 -94

SECTION A3: PARTICULAR SPECIFICATIONS

CONTENTS LIST PAGE

PA : BRICKWORK, BLOCKWORK AND PLASTERING C3-95

PB : CARPENTRY, JOINERY, TIMBERWORK AND CEILINGS C3-103

PC : STEEL DOORS, WINDOWS, GLAZING AND FIRE PROTECTION EQUIPMENT C3-108

PD : PAINTING (OTHER THAN STRUCTURAL STEELWORK) C3-113

PE : PIPELINE VALVES C3-118

PG : GRASSING C3-124

PH : FENCING C3-128

ELECTRICAL SPECIFICATION (SMALL POWER AND LIGHTING TO BUILDINGS): REFER TO SECTION C1 AND C2


C3 -95

PARTICULAR SPECIFICATION PA : BRICKWORK, BLOCKWORK AND PLASTERING

CONTENTS PAGE

PA 1 BRICKS AND CONCRETE BLOCKS C3-96

1.1 Burnt Clay Masonry Units 1.2 Concrete Masonry Units

PA 2 BONDING OF BRICKWORK AND BLOCKWORK C3-97

2.1 Brickwork Bonds 2.2 Blockwork Bonds

PA 3 BRICKLAYING AND BLOCKLAYING C3-97

3.1 Laying Clay Bricks 3.2 Laying Concrete Blocks

PA 4 LOUVRE VENTS AND AIR FILTERS C3-98 PA 5 BUILDING IN PIPES, FRAMES, STEELWORK, ETC C3-98 PA 6 DAMP PROOFING C3-98

6.1 Damp Proof Course 6.2 Underfloor Waterproofing 6.3 Waterproofing Blockwork Faces

PA 7 WINDOW SILLS C3-99 PA 8 PRECAST CONCRETE LINTELS C3-99 PA 9 EXTRACTION FANS C3-99 PA 10 WALL CHASING C3-99 PA 11 CEMENT MORTAR C3-100

11.1 Mortar for Brickwork 11.2 Mortar for Blockwork

PA 12 REINFORCEMENT C3-100

12.1 Reinforcement to Brickwork 12.2 Reinforcement to Blockwork

PA 13 HOOP IRON TIES AND ANCHORS C3-100 PA 14 PLASTERING C3-101 PA 15 PAYMENT FOR BRICKWORK C3-101 PA 16 PAYMENT FOR BLOCKWORK C3-102 PA 17 PAYMENT FOR PLASTERING C3-102


C3 -96

PA 1 BRICKS AND BLOCKS

PA 1.1 Burnt Clay Masonry Units

Solid clay masonry units (bricks) shall be of nominal dimensions 222 x 106 x 73 mm, unless otherwise noted, shall comply with SABS 227 and conform with the types scheduled, as selected from the following:

Nominal

Compressive Strength

Max Water Absorption

FBX - face brick extra 17 Mpa 10%

FBS - face brick standard 17 MPa 12% NFP - non facing to be plastered 10,5 MPa 15% NFX - non facing extra for damp conditions

14 MPa 15%

Engineering bricks shall carry the suffix ‘E’ and the compressive strength in MPa and shall be of one or more of the following types as scheduled:

Max Water

Absorption FBXE 45 the best engineering brick 7% FBSE 30 a good engineering brick 8% NFXE 14 the lowest acceptable category

10%

Sample bricks shall be taken at random by the Engineer should he consider tests to be necessary. These tests shall normally comprise an inspection for defects, a compressive strength test and a water absorption test. Should any deficiencies become apparent after testing in according with SABS 227 the Engineer shall have the right to reject the complete consignment.

PA 1.2 Concrete Masonry Units

Concrete masonry units (blocks) shall comply with SABS 1215 and shall be either solid or hollow as called for in the Schedule of Quantities or shown on the drawings.

The preferred dimensions of units where not otherwise called for, are as follows:

Solid Units 222 x 106 x 73 mm or 190 x 90 x 90 mm Hollow Units

390 x 90 x 190 mm

or 390 x 190 x 190 mm The nominal compressive strength of solid units or hollow blocks shall be at least

14 MPa except where shown otherwise on the drawings or the Schedule of Quantities. The alternative strengths shall be either 7 or 21 MPa (3,5 MPa strength is not acceptable under this Contract).

Masonry units manufactured with aggregates which contain slag, clinker or burnt clay brick shall not be used unless prior approval has been obtained from the Engineer.

The average drying shrinkage of units shall not exceed 0,06% and the average expansion on rewetting shall not exceed 0,02% in excess of the actual drying shrinkage obtained from manufacturer’s tests.


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Sample units shall be taken at random by the Engineer, should be consider that tests are necessary to satisfy himself that there are no deficiencies in any consignment. Should deficiencies occur when tested in accordance with SABS 1215 the complete consignment may be rejected.

PA 2 BONDING OF BRICKWORK AND BLOCKWORK PA 2.1 Brickwork Bonds

Brickwork shall be laid in stretcher bond unless otherwise noted on the drawing or scheduled to the contrary.

Cavity brickwork shall include wall ties which connect the inner and outer skins of the wall. The ties shall be galvanised and of approved pattern fixed at 5 number per square meter.

PA 2.2 Blockwork Bonds

Bonding of blockwork shall be carried out in full compliance with Sub-Clause 5.3.7 of

SABS 0145. PA 3 BRICKLAYING AND BLOCKLAYING PA 3.1 Laying Clay Bricks

Brickwork shall be well and regularly bonded, with no false headers and none but whole bricks except where legitimately required as closers. All bricks must be thoroughly wetted before laying and each brick is to be pressed into its bed so as to squeeze out superfluous mortar and give a finished joint generally 10 mm thick, but in no case shall it exceed 12 mm thick. All joints, both horizontal and vertical, notwithstanding any trade custom to the contrary, are to be filled solid with mortar for their full width and depth, each course being flushed with mortar, worked well down into all vertical joints before the succeeding course is laid.

Horizontal and vertical joints shall be rounded, square or flush pointed as required by the Engineer. All joints of facework shall be pointed flush. Plastered walls shall have the joints raked out to a depth of 6 mm to form a key for the plaster.

Bricklaying is to be carried out uniformly so that no part of the work shall be in advance of any other part by more than six courses, unless otherwise authorised by the Engineer. In the latter case the work is to be stepped back as toothing will generally not be allowed.

The cavity in cavity walls shall be kept free from mortar droppings and movable boards of the appropriate widths shall be used for the purpose. Vertical joints in the outside leaf on the course immediately above the damp proof course shall be raked out every third brick to drain the cavity.

PA 3.2 Laying Concrete Blocks Concrete blocks shall be laid in compliance with Code of Practice SABS 0145-1978.

Blocks shall not be wetted prior to laying in a wall and the moisture control at the time of laying shall comply with Table 2 of that Code of Practice. The drying shrinkage of the blocks to be laid shall be available to the Engineer in the form of a directive from the manufacturer of each type of masonry unit. The average annual humidity shall likewise be made available to the Engineer.

Blocks shall be laid on a full bedding of mortar. All joints are to be nominally 10 mm thick and both vertical and horizontal joints shall be completely filled. Blocks shall be


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laid with the thicker shell face outermost. They shall be laid in stretcher bond with the horizontal distance between vertical joints in adjacent course equal to at least one quarter of the length of the block. All blockwork shall be built true and plumb with the perpends vertically in line.

Control joints shall be formed at spacings indicated in Table 3 should joints not be detailed on the drawings. The spacing is a function of the vertical spacing of the horizontal reinforcement.

Corners and other work where the blocks are necessarily laid to a higher level than the general progress of work shall be stepped back and not raised above the level of the remaining blockwork by more than one metre.

Blocks below damp proof course level shall be concrete filled using concrete having the same mix proportions as the concrete in the strip foundations. The concrete shall be struck off flush at damp proof course level.

Horizontal reinforcement shall be placed at 600 mm vertical spacings unless shown otherwise on the drawings and bond beams shall be incorporated in the structure as shown on the drawings.

Fire resistance ratings as shown in Table 4 of the Code of Practice shall be adhered to, if required by the drawings.

PA 4 LOUVRE VENTS AND AIR FILTERS

Where indicated on the Drawings or ordered by the Engineer, openings for louvre vents shall be formed through walls, and vents supplied by an approved manufacturer shall be fitted therein and neatly finished off.

Where indicated on the Drawings, openings shall be formed through walls for air filters and the filters, supplied by an approved manufacturer shall be jointed together to form panels as shown on the drawings and fitted in accordance with the manufacturer’s instructions.

PA 5 BUILDING IN PIPES, FRAMES, STEELWORK ETC

All window and door frames and wall vents are to be set up and built-in as the brickwork proceeds. Window and door frames are to be set, bedded and pointed in 4:1 sand cement mortar and the tendered unit rates are to include for any cutting and fitting of brickwork and for making good thereafter. The unit rates are also to include for attending to windows, doors and vents etc, in order to leave them in perfect working order. The Contractor will be held liable for the repair of any damage done to such items during progress of the work.

Where pipes, frames, brackets or other such parts pass through or have to be set into brickwork, the bricks shall be carefully cut and fitted around the parts so as to maintain regularity of courses and uniformity of joints, the shaped bricks being bedded and pointed to conform with the surrounding brickwork. Where such parts have to be set into position after brickwork is built, holes shall be left wherever possible, in preference to cutting out bricks, and the work shall be subsequently made good in the manner described.

PA 6 DAMP PROOFING PA 6.1 Damp Roof Course

Where indicated on the Drawings, a damp proof course is to be embedded into the work, consisting of a bituminous sheeting of mass not less than 1,3 kg/m² or PVC

sheeting of 0,375 mm thickness laid over the full width of the wall, lapped and sealed at all joints. Where shown on the Drawings, the damp proof course is to be stepped


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up one course of brickwork in the inner skin. Proper returns are to be made at all door frames.

Damp proof courses in blockwork shall be laid strictly in accordance with Sub-Clause 5.3.6 SABS 0145 at all places indicated in that Code or Practice.

PA 6.2 Underfloor Waterproofing

Underfloor waterproofing membranes, where called for, shall be of 250 micron thick PVC sheeting lapped to a minimum of 200 mm at all joints.

PA 6.3 Waterproofing Blockwork Faces

Where the external faces of blockwork are not to be plastered they shall be treated with an approved waterproof coating applied in accordance with manufacturers instructions.

PA 7 WINDOW SILLS

Window sills shall be manufactured and installed as shown on the drawings including items such as damp proof course and expanded metal reinforcement where called for.

PA 8 PRECAST CONCRETE LINTELS

Precast concrete lintels over doors and windows shall be supplied by an approved manufacturer and suitable for the thickness of the walls being constructed. Shoring of soffits of lintels shall be fixed on spans exceeding 2,5 m and left in place for as long as the Engineer considers necessary. The length of lintels shall be such as to give at least 200 mm of bearing at each end, unless noted otherwise.

PA 9 EXTRACTION FANS

Where indicated on the drawings, openings shall be formed through walls for extraction fans. The required fans complete with bird proof weather cowl, shall be supplied and fitted therein by an approved specialist firm. Making good around the fan unit shall be carried out by the Contractor.

PA 10 WALL CHASING

Where directed by the Engineer the Contractor shall chase brickwork to accommodate electrical conduit. Such chasing shall precede plastering or rendering and on no account shall the plastering or rendering be commenced until the conduit has been installed. The Contractor’s rates for chasing shall include for making good the brickwork after the conduit has been fixed.

In the case of unplastered concrete walls electrical conduit shall either be cast into the concrete during pouring or shall be surface mounted as indicated on the drawings or in the Schedule of Quantities.

Chasing in masonry units shall be carried out in compliance with SABS 0145 and where possible, as directed by the Engineer, shall be cut prior to laying the blocks.


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PA 11 CEMENT MORTAR PA 11.1 Mortar for Brickwork

Sand for mortar shall comply with SABS 1090 and be well graded from 5 mm down in accordance with Table 1. Sand shall not contain an excess of dust or fine material. Cement shall be Portland cement Type CEM.I 42,5 to SABS.ENV 197-1.

Cement mortar shall be in the proportion 1 part ordinary Portland cement to 4 parts sieved sand in the case of face brickwork, and 1 part cement to 5 parts sand for all other brickwork.

PA 11.2 Mortar for Blockwork

Mortars to be used for blocklaying are to be in accordance with either Classes I, II or III as specified in SABS 0145 Sub-Clause 3.2.3 as called for in the Schedule of Quantities or on the drawings. Should no specific strength be specified then Class II mortar having a compressive strength of 5 MPa at 28 days shall be used. The mortar

mix shall be 170 l of sand to 50 kg of Portland cement 42,5 and which shall be used in conjunction with a mortar plasticizer conforming to BS 4887.

Alternatively, 50 kg of an approved masonry cement (supplied by a reputable manufacturer) may be used in lieu of 50 kg of Portland cement in the mix to give the same 28 day strength as required under the previous paragraph, but in that case no mortar plasticizer is to be used.

PA 12 REINFORCEMENT PA 12.1 Reinforcement to Brickwork

Brickforce mesh or similar approved reinforcement shall be built into brickwork where specified or shown on the drawings. Reinforcement to brickwork shall comprise galvanised welded mesh as called for on the drawings supplied in rolls. The mesh shall be of suitable width to suit the brickwork thickness and the minimum cover from any external face shall be at least 10 mm. Reinforcement is to be built in every third course except where shown otherwise on the drawings. Except where shown to the contrary on the drawings, galvanised steel strips of dimensions 1 360 mm long x 40 mm wide x 1,6 mm thick shall be used to tie brickwork into concrete columns at every fourth course.

PA 12.2 Reinforcement to Blockwork

Reinforcement to blockwork shall comprise galvanised welded mesh supplied in rolls. The mesh shall be of suitable width to suit the blockwork thickness and the minimum cover from any external face shall be at least 20 mm. The number of courses where reinforcement is to be built in shall be at 600 mm (maximum) vertical spaces, except where shown otherwise on the drawings.

PA 13 HOOP IRON TIES AND ANCHORS

Galvanised hoop iron ties shall be provided for securing roof timbers to brick walls and shall be built-in to a vertical depth of not less than six courses of brickwork with bottom ends bent square to form an anchor. The upper ends shall project at least 450 mm above the brickwork for attachment to roof timberwork.

Anchoring of roofs and floors in blockwork shall be carried out in accordance with Sub-Clause 5.3.8 of SABS 0145 except where shown otherwise on the drawings.


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PA 14 PLASTERING

Plastering shall be composed of one part Portland cement (CEM 142,5) plus one tenth part lime to four parts fine plaster sand from an approved source. An equivalent mortar comprising other cementitious materials may be approved by the Engineer, after testing. Plaster shall be applied to walls in one coat 12 mm thick and well worked into brickwork or blockwork joints, which shall have been previously raked out to form a key. The surface of the work shall be finally smoothed with a wooden float or steel trowel, as may be called for, depending upon the nature of the surface required. Angles and edges are to be carefully plumbed or levelled, as the case may be, and corners shall be arris rounded.

In the case of plastering to concrete work, the surface of the concrete shall first be hacked sufficiently to afford proper bond and the plaster applied as a thin skimming coat, or coats. V-joints shall be formed at the junction of concrete and brickwork. Plaster adhesive supplied by a reputable manufacturer may be used on the concrete faces in lieu of hacking, subject to approval by the Engineer.

Where scheduled or shown on the drawings, the external faces of brickwork, blockwork and/or concrete shall be cement mortar plastered.

Should any plaster show signs of cracking, blowing or other defects at any time before or during the defects Liability Period, the defective work shall, either be stripped and replastered or locally repaired by the Contractor, all at his own expense, as directed by the Engineer. The defective areas shall be cut out to a rectangular shape unless otherwise permitted, with edges undercut to form a key and the joint carefully smoothed off flush with the surrounding plaster. Plasterwork should in all cases be commenced at the top and proceed downwards and every care must be taken to prevent staining of face brickwork and other finished parts with plaster droppings. Such droppings shall not be allowed to harden, but shall be cleaned off continuously as plastering proceeds. Plaster droppings in sumps must be removed to the satisfaction of the Engineer. Plastering must be carried out from ceiling to floor and from wall to wall without any breaks in the plastered surface.

PA 15 PAYMENT FOR BRICKWORK PA 15.1 Payment for brickwork will be made by area of finished brickwork of the various

thicknesses and types as scheduled, measured in elevation. Unit : m².

Prices shall be inclusive of the supply of all materials, plant and labour necessary for completing the work including the building in of wire ties, all plumbing of corners and faces, lining, levelling, forming reveals and openings, cutting where necessary but not specially scheduled. The measurement of the work will be taken net with window and door openings deducted, but no deductions from the measurements will be made for lintels, air bricks, pipes up to and including 150 mm diameter or fittings up to 150 mm square built into the work. Small openings of area up to 0,05 m² will not be deducted.

Items for brickwork are scheduled separately for reinforced and unreinforced brickwork, except for small areas of reinforced brickwork over openings, windows and doors etc, which are deemed to be included in the rate for unreinforced brickwork.

PA 15.2 Payment for louvre vents and air filters will be made by number supplied and installed.

Unit : No PA 15.3 Payment for building in window frames, doors frames, pipes, steelwork etc shall be

paid separately for each type and size as scheduled. Unit : No

PA 15.4 Payment for damp proof course will be made by the net area of each size supplied

and installed. No separate payment will be made for overlaps etc. Unit : m²


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PA 15.5 Payment for lintels will be made by length installed.

Unit : m PA 15.6 Payment for extraction fans will be made by number supplied and installed. The

tendered rate shall include for forming the necessary openings through the walls. Unit : No

PA 15.7 Payment for chases in brickwork for electric conduits will be made per linear metre of

chase cut. Unit : m

PA 15.8 Payment for hoop iron ties will be made by number supplied and installed.

Unit : No PA 16 PAYMENT FOR BLOCKWORK PA 16.1 Payment for blockwork will be made by area of finished blockwork of various

thicknesses and types, measured in elevation. Unit : m²

Prices shall be inclusive of the provision of all materials, plant and labour necessary for completing the work including the building in of wire ties, all plumbing of corners and faces, lining, levelling, forming reveals and openings, cutting where necessary and plastering where specified. The measurement of the work will be taken nett with window and door openings deducted, but no deductions from the measurements will be made for lintels, air bricks, pipes up to and including 150 mm diameter or fittings up to 150 mm square built into the work. Small openings of area up to 0,05 m² will not

be deducted. PA 16.2 Payment for infilling of blockwork with concrete shall be extra over the payment item

PA 16.1 above, for various thickness and types, measured in elevation. The rate shall include the provision of expanded metal mesh where indicated. Unit : m²

PA 16.3 Payment for waterproof coating of external faces shall be by the surface area actually

treated. Unit : m²

PA 17 PAYMENT FOR PLASTERING PA 17.1 Payment for plastered finish to walls will be made by area of finished plaster,

measured in elevation, for each surface finish specified. Prices shall be inclusive of the provision of all materials, plant and labour necessary for carrying out the plastering work, including the plumbing of corners and faces and forming reveals and openings. The measurement of the work will be taken net with window and door openings deducted. Small openings of area up to 0,05 m² will not be deducted.

Unit : m²


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PARTICULAR SPECIFICATION PB : CARPENTRY, JOINERY, TIMBERWORK AND CEILINGS

CONTENTS PAGE PB 1 TREATMENT OF TIMBER C3-103 PB 2 WROUGHT FACE C3-103 PB 3 STRUCTURAL AND ENGINEERING TIMBER C3-104 PB 4 SHRINKING, WARPING AND TWISTING C3-104 PB 5 PREFABRICATED ROOF TRUSSES C3-104 PB 6 ROOF TIMBER WORK C3-104

6.1 Bolted Roof Trusses 6.2 Wall Plates, Purlins and other Members

PB 7 CEILINGS C3-105

7.1 Normal Sheeted Ceilings 7.2 Patented Ceilings 7.3 Thermal Insulation to Ceilings

PB 8 WOODEN DOOR FRAMES C3-105 PB 9 TIMBER DOORS C3-106

9.1 Hardwood Exterior Doors 9.2 Interior Timber Doors

PB 10 EAVES C3-106 PB 11 WOOD PRESERVATION C3-106 PB 12 PAYMENT FOR CARPENTRY, JOINERY, TIMBERWORK AND CEILINGS C3-106 PB 1 TREATMENT OF TIMBER

Timber shall be treated with a wood preservative to the approval of the Engineer. Proof that such treatment has been carried out shall be given to the Engineer should he so request.

Timbers not required to be treated shall, however, be treated with wood preservative where the timber is to be used in wall plates, bearers, joists and beams, and the portions thereof which are to be built into brick or concrete work.

The preservative to be used shall be covered by relevant SABS specifications and shall be to the approval of the Engineer.

PB 2 WROUGHT FACE

All exposed woodwork, unless otherwise described, is to be wrought and for each wrought face 1,5 mm will be allowed off the specified sizes. All wrought faces are to be finished smooth and free from tool marks.


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PB 3 STRUCTURAL AND ENGINEERING TIMBER

All timber to be used in general structural work shall conform to the requirements of SABS 563 for stress Grade M5 with a density of at least 360 kg/m3, unless otherwise scheduled.

Where a stress grade other than M5 is called for, the timber used shall conform to SABS 1245 for engineering timber. Where reference is made to SABS 1245 for Engineering Timber, the strength grade shall be as scheduled or as shown on the drawings.

PB 4 SHRINKING, WRAPPING AND TWISTING

Should any timber member shrink or wrap more than 3 mm, or twist more than 2º

over its full length, the same shall be removed and new timber refixed in its place at the Contractor’s expense, together with any other member which may thereby be affected.

PB 5 PREFABRICATED ROOF TRUSSES

Prefabricated timber roof trusses shall be made from South African pipe complying with PB3 above, having a stress grading of M5 and bearing the SABS mark. The joints shall be butted and joined with suitably sized “gangnail” or similar approved galvanised connector plates. Each joint shall be capable of withstanding a loading at least 50% in excess of that imposed by the maximum design load for the truss.

Drawings of the prefabricated trusses the Contractor proposes to use shall be submitted to the Engineer for approval in good time prior to the Contractor placing orders for such trusses. The drawings shall show the following minimum information for each type of truss required.

a) The design span and spacing of the trusses. b) The overall height from underside of cross beam to apex. c) An elevation of the truss showing the size of all the members, the position of the

purlins and the spacing of the trusses along the line of the roof. d) The “gangnail” plate sizes at every joint. e) The type of roof covering material and the design loading.

PB 6 ROOF TIMBER WORK PB 6.1 Bolted Roof Trusses

These trusses including the tie beams shall be made from timber having a stress grading of M5 and shall be constructed to the dimensions shown on the drawings or as scheduled. The trusses shall be strongly framed, halved, checked and bolted together in the best manner and in accordance with acceptable practice. The work is to be soundly secured and accurately lined and set to conform with the overall sizes given. The timber shall be wrought where exposed to view.

Bolts unless otherwise specified or scheduled shall be 12 mm diameter, of adequate length and provided with a pair of 50 mm diameter x 2,0 mm thick circular washers.


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PB 6.2 Timber Wall Plates, Purlins and Other Members

Timber roof members shall be manufactured from timber complying with PB3 above and shall be cut to the dimensions shown in the drawings, mitred and jointed where necessary. Joints in straight runs of timber shall be spliced and nailed, with the length of splice being at least 5 times the depth of the member and the nail centres equal to the depth. The number of joints shall be minimised to the satisfaction of the Engineer.

All members which are built into brickwork or blockwork and all faces of members exposed to the weather shall receive a suitable approved wood treatment.

PB 7 CEILINGS PB 7.1 Normal Sheeted Ceilings

The underside of roof ties shall be lined with the ceiling material shown on the Drawings or as scheduled. Ceiling materials shall be nailed to the brandering with galvanised clout nails in countersunk holes and stopped with putty where not covered with cover strips. Brandering shall be of at least 38 x 38 mm square section and shall be provided at not more than 560 mm centres to suit ceiling panels and with cross brandering where required at not more than 1 200 mm centres, cut in flush at joints and side nailed. All joints in the brandering shall be scarfed joints. The ceiling panels which shall not exceed the sizes recommended by the manufacturer shall be nailed every 150 mm along the panel edges and at a distance of 10 mm in from the edge. Suitable metal strips covering the joints and returned around cornice lines shall be provided. Special serrated ceiling nails shall be used in accordance with the manufacturer’s recommendations.

Ceilings shall be fitted only after completion, testing and acceptance of all electric wiring required to be laid in the roof space above, except where ordered to the contrary by the Engineer.

A trapdoor 600 x 600 mm covered, framed and supported in accordance with acceptable practice, shall be provided in the ceilings.

Formed cove cornice 55 x 55 mm shall be fixed to the ceiling, plugged to walls and neatly mitred at all corners. Coving shall extend for the full peripheral length of all ceiling to wall junctions.

PB 7.2 Patented Ceilings

Where the ceiling shown on the drawings or schedule is of a patented type, the materials supplied and the workmanship of fixing shall be strictly in accordance with the manufacturer’s specification.

PB 7.3 Thermal Insulation to Ceilings

Thermal insulation materials shall comply with SABS 1381 and be as scheduled or as noted on the drawing. The insulation shall fully cover the total ceiling area to be insulated as indicated on the drawings.

PB 8 WOODEN DOOR FRAMES

All wooden door frames shall be manufactured from hardwood (meranti or better), rebated, and grooved if required for plaster. Hardwood quadrant fillets, neatly mitred at angles, are to be fitted around all frames where abutting on concrete or cover strips, plaster or brickwork. Door frames shall be anchored into brickwork and secured to


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concrete work with an approved type of anchoring or fastening, spaced at not more than 600 mm centres.

PB 9 TIMBER DOORS PB 9.1 Hardwood Exterior Doors

Hardwood exterior doors shall be heavy duty doors, framed, ledged, braced and battened solid wood doors of meranti or similar approved hardwood manufactured in compliance with SABS 545, for Class 2 (semi-interior) exposure. The timber shall comply with SABS 1099 without any laminations and the finished door shall be 44 mm thick for use with solid timber frames. Door edges shall be of the concealed edge type.

Where steel frames are specified on the drawings or scheduled, the doors shall be 40 mm thick.

Double leaf doors shall be one way opening with rebated meeting stiles.

All exterior doors shall be of standard dimensions except where scheduled to the contrary.

PB 9.2 Interior Timber Doors

Interior timber doors shall be medium duty veneered doors in compliance with SABS 545 and suitable for Class 4 (dry interior) exposure. Door edges shall be of the concealed type.

The veneer shall be of the natural finish suitable for varnishing, except where painting of the doors is required by the drawings or Schedule of Quantities in which case the veneer shall be suitable for such painting.

All interior doors shall be of standard dimensions and 40 mm thick. PB 10 EAVES CLADDING

Eaves shall be constructed and covered as scheduled and/or as shown on the Drawings.

PB 11 WOOD PRESERVATION

Wall plates, and other timber work to be built into or set against brickwork, shall receive two coats of an approved wood preservative on all faces which will not be exposed to view after installation. The preservation shall comply with the applicable clauses of SABS 05-1980.

PB 12 PAYMENT FOR CARPENTRY, JOINERY, TIMBERWORK AND CEILINGS PB 12.1 Carpentry and joinery work will be paid for in accordance with the units and rates

scheduled. The Contractor is to include for all beads, fillets, stops, grounds and all rebating, tenoning, grooving, housing, morticing, framing and planing and all other necessary work to complete the whole of the carpentry and joinery work in the best manner according to details on the drawings and/or Schedule of Quantities.

Unit : m : m2 : No : Sum


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PB 12.2 Prices for timber work, where scheduled separately, shall include for all necessary working, cutting, trimmings, application of preservative to built in portions of the work, etc, and for providing all necessary cleats, spikes, bolts, nails, etc. Measurement of the various members shall be taken as that of each size of timber from which the member can be cut, taken to the nearest length of 150 mm in excess of the actual required length.

Unit : m PB 12.3 Factory made roof trusses shall be paid for by the total requirements including wall

plates, purlins, rafters and all associated work for each Building scheduled. Unit : Sum

PB 12.4 Prices for ceilings shall include the provision of all materials (including waste and

fastenings) and for all labour and plant required to complete the ceilings as shown on the drawings.

Payment shall be made by the actual surface area of finished ceiling taking into account whether the ceiling plane is horizontal or sloping.

Unit : m²

Payment for ceiling brandering shall be made by area of ceiling to be attached thereto but only where scheduled separately.

Unit : m²

Payment for thermal insulation to ceilings shall be made on the same basis as for the ceiling and for each specified thickness of insulation layer but only where scheduled separately.

Unit : m²

Prices for coved cornices (or cover strips) shall be per linear metre. Unit : m

PB 12.5 Payment for eaves cladding shall be made on the same basis as for ceilings (see PB

12.4 above). Unit : m²

PB 12.6 Payment for wood preservation shall not be made separately (except when so

scheduled) the cost being deemed to be included in the rates tendered for timberwork. PB 12.7 All prices tendered for payment under items PB 12.1 to PB 12.6 as applicable shall

include for the provision of all labour, plant and materials (including waste) required to complete the respective items of work.


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PARTICULAR SPECIFICATION PC : STEEL DOORS, WINDOWS, GLAZING & FIRE PROTECTION EQUIPMENT

CONTENTS PAGE PC 1 STEEL DOORS AND FRAMES C3-108

1.1 Pressed Steel Door Frames 1.2 Steel Doors, Sidelights and Fanlights 1.2.1 General Requirements 1.2.2 Stock Door Units 1.2.3 Purpose made Door Units 1.3 Payment for Doors Units

PC 2 STEEL WINDOWS C3-110

2.1 Materials 2.2 Construction 2.3 Payment for Windows

PC 3 IRONMONGERY C3-111 PC 4 GLAZING C3-111

4.1 Glass Material 4.2 Fixing of Glass Panes 4.3 Payment for Glazing

PC 5 FIRE PROTECTION EQUIPMENT (Small Buildings) C3-112

5.1 General 5.2 Fire Hose Reels 5.3 Fire Extinguishers 5.4 Signage 5.5 Payment for Fire Protection Equipment

PC 1 STEEL DOORS AND FRAMES PC 1.1 Pressed Steel Door Frames

Pressed steel door frames shall be of welded one piece construction or of an approved knock-down type for assembly on site, and constructed of mild steel sheet, pressed or rolled to the required shapes.

Frames for walls one brick thick shall have a single rebate profile and the frame material shall be at least 1,6 mm thick.

All other frames, unless otherwise specified, shall be double rebated and manufactured from metal at least 1,6 mm thick.

Frames shall be of widths required to suit the thickness of walls into which they are to be built, and shall be fitted with suitable tie-bars and braces at bottom, and lugs for building in three to each jamb of frames without fanlights, and four to each jamb of frames with fanlights. Where fanlights are shown over doors the frame shall be fitted with transoms of pressed or rolled steel sheet as above rebated for fanlights and for doors if required and shall have a nominal thickness of at least 1,6 mm thick metal. The rebates in frames and transoms for doors and fanlights shall be of width required to suit the thickness of doors and fanlights.

Frames shall have holes as and where required for screws for fixing fanlight openers, keeps of spring catches, etc. Where fanlights are shown to be fixed into frames, the frames shall be holed and tapped in the rebates suitable for screws for fixing the top centres.


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Frames for single doors shall be fitted with an approved chromium plated, or stainless steel (unless otherwise specified) adjustable striking plate keep, boxed in at the back of the frame with a sheet metal box welded on, and not less than two rubber buffers.

All welding shall be cleaned off smooth and flush on exposed surfaces and frames shall be cleaned and primed as described for steel windows, before leaving the manufacturer’s works.

PC 1.2 Steel Doors, Sidelights and Fanlights PC 1.2.1 General Requirements

Steel doors shall comply with the requirements of SABS specification 727, constructed from mild steel sheet of at least 1,6 mm thick metal.

All doors, sidelights and fanlights, shall, in addition, comply with the following requirements:

i) Suitable weather bars shall be provided to render external doors, etc, perfectly

watertight. ii) Frames of doors, etc. where fixed to concrete columns, beams, etc, shall be

provided with suitable lugs for fixing to plugs in the concrete at same spacing as the standard fixing lugs.

iii) Doors, sidelights, fanlights and components except where specified to be hot dip

galvanised, shall be clean and primed as described below.

Door, sidelights and fanlights unless otherwise shown shall be of “one piece” construction, but where shown to be in two or more “ one piece” units, the units shall be coupled together with standard coupling mullions and/or transoms.

Bottom openings in doors and sidelights shall be fitted with kicking plates of one thickness of 1,6 mm thick mild steel sheet fixed with metal beads.

Frames for outward opening doors shall be fitted at bottom with cills of door framing section (stepped cills) and frames for inward opening doors with metal ties, welded to frames, for embedding in thresholds (flush cills).

After doors, sidelights and fanlights have been built in and before being glazed, they shall be checked for alignment, adjusted as necessary, and left in a satisfactory state and in good working order.

PC 1.2.2 Stock Doors Units

Stock doors, sidelights and fanlights shall be of the type shown on the drawings, the doors constructed of not less than 33 mm universal steel sections, and sidelights and fanlights of 25 mm sections as described for windows.

Each leaf of a double door and each single door shall be hung on three steel hinges having brass pins. Hinges shall be of the parliament type where frames are set back from wall faces and where doors are shown to fold back against these faces.

Doors shall be fitted with mortice locks having not less than three levers and heavy brass or chromium plated brass bolts. Handles and bolts are to have a polished finish, unless otherwise specified.

Fanlights shall be hung and fitted as described for steel windows.


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PC 1.2.3 Purpose made Doors Units

Purpose made doors complete with frames shall be manufactured and set into brickwork as described on drawing 120296/W/010.

PC 1.3 Payment for Door Units

Door units shall be supplied and installed complete with frame, hinge, locks and bolts as scheduled or detailed on the Drawings. Each size and type shall be measured separately.

Unit : No PC 2 STEEL WINDOWS PC 2.1 Materials

Stock residential and industrial type steel windows shall comply with the requirements of SABS Specification 727, and all other types shall comply with the constructional and other requirements of the above specification wherever applicable. All windows shall in addition, comply with the following additional and/or amended requirements, viz:

i) Suitable weather bars shall be provided to bottom of inward opening and vertically

pivot hung ventilators and also to the bottom of all outward opening ventilators where they occur above other ventilators and elsewhere as may be required to render the windows perfectly watertight.

ii) Frames for windows where fixed to concrete columns, beams, etc, shall be

provided with suitable lugs for fixing to plugs in the concrete, or with holes for screwing to plugs in the concrete, all at the same spacing as the standard fixing lugs.

iii) Windows and components, except where specified to be hot dip galvanised, shall,

before leaving the manufacturer’s works, be cleaned by acid pickling, rinsing and drying, as laid down in SABS 064, or by other approved means, to remove all scale, rust, grease, oil and foreign matter, and then primed with red oxide zinc chromate primer complying with requirements of SABS 909. The primer shall be applied by dipping or by means of spray gun.

Ventilators hung at one side to open outwards for windows above ground floors and not accessible for cleaning from an adjoining opening ventilator in the same window or from verandahs, balconies and the like, shall be hung on projecting hinges.

Windows, unless otherwise specified, shall be of one piece construction but where shown to be in two or more “one piece” units, the units shall be coupled together with standard coupling mullions and/or transoms.

Windows shall be fitted with brass handles, stays, catches and other fittings as later described. Those for windows constructed of universal sections shall have a polished finish whereas all other windows shall have a tumbled finish. The fittings shall be fixed in such a way as to be removable after windows are glazed.

After the windows have been built in, but before being glazed they shall be checked for alignment adjusted as necessary and left in a satisfactory state and in good working order.


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PC 2.2 Construction

The construction of windows shall from an approved window manufacturer supplying

the windows as specified on the detailed window schedule.

PC 2.3 Payment for Windows

Window units shall be supplied and installed complete as specified, scheduled and detailed on the Drawings, including for glazing. Payment will be by number for each type and size. Unit : No

The tendered rates shall include for the provision for all materials (including fastenings, hinges, ironmongery, glass etc) except where scheduled separately, and for all labour and plant required to build the windows into the structures.

PC 3 IRONMONGERY

All ironmongery shall be of best quality, and shall be approved before fixing with screws or bolts of similar metal. No key shall pass a second lock. All screws, nails, bolts, etc, required for completion of the work, shall be supplied by the Contractor.

Prices for all ironmongery where scheduled separately are to include the provision of all materials, plant and labour necessary for fixing to softwood, hardwood or steel door frames as the case may be including all notches, grooves, sinkings, etc, where required. If not scheduled separately the cost of ironmongery shall be included in the price quoted for the parent body.

At junctions of differing floor finishings provide and build in 25 x 3 mm brass strips with top edges flush with the adjoining finishings. The cost of the brass strips shall be included in the floor materials and not paid for separately.

PC 4 GLAZING PC 4.1 Glass Material

All glazing to conform to SANS 10137 (SABS 0137) Code of Practice – The Installation of Glazing to Build and where applicable, SABS 1263 Part 1: Safety and Security Glazing Materials for Buldings.

PC 4.2 Fixing of Glass Panes

Glazing to windows shall be well bedded at both back and front with putty and sprigged or otherwise mechanically located in the window frames. All putty shall be carefully trimmed and cleaned off and finished to neat straight lines.

Glazing putting shall be in accordance with SABS 680 suitable for use with metal or wooden window frames as appropriate and shall be of the self-setting type unless shown otherwise on the drawings.

The window frames shall be primed with an appropriate and approved wood or metal primer before glazing is commenced.

PC 4.3 Payment for Glazing

Glazing will not be paid for separately (except where otherwise scheduled) as the prices scheduled for windows and glazed doors will be deemed to include all costs associated with the glazing. If scheduled separately, payment will be made by number of each size and type installed.

Unit : No


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PC 5 FIRE PROTECTION EQUIPMENT (Small Buildings) PC 5.1 General

Unless otherwise specified, all materials will comply with the relevant SABS specifications relating to Fire Protection.

PC 5.2 Fire Hose Reels

Each fire hose reel is to be an approved type complying with SABS 543 and constructed with 580 mm diameter pressed steel side discs, red enamelled with chromium plated centre. Each reel is to be provided with a 25 mm chromium plated gunmetal control valve fixed separately from the reel, a 30 m length of 20 mm rubber and canvas, or reinforced plastic, non-kinkable hose terminating in a 5 mm chromium plated shut-off nozzle and chromium plated swivelling pulley and nozzle bracket.

The Contractor must fix the fire hose reels to walls where indicated on drawings with 10 mm diameter hook or rag bolts, not less than 150 mm long built into walls in 3:1 cement mortar. The centre of each fire hose reel, unless otherwise specified, is to be approximately 1.5 above floor level.

PC 5.3 Fire Extinguishers

Fire Extinguishers shall comply with the SABS 1573 specification and shall be the 9 kg dry chemical powder type, supplied by an approved reputable company and maintained by that company, unless otherwise specified on the schedule or drawings.

Extinguishers are to be mounted to walls, where indicated on drawings and fixed as per the manufacturers specifications. Extinguishers are to be supplied with backing boards.

PC 5.4 Signage

Escape routes and the locations of fire fighting equipment are to be clearly indicated throughout the building and all signage is to comply with SABS 0400 and its relevant amendments.

PC 5.5 Payment for Fire Protection Equipment

Payment shall be by number of each item installed as scheduled. Unit : No

Prices shall include for the provision of all materials, plant and labour necessary to complete the required installations.


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PARTICULAR SPECIFICATION PD : PAINTING (OTHER THAN STRUCTURAL STEELWORK)

CONTENTS PAGE PD 1 SCOPE C3-113 PD 2 MATERIALS C3-113

2.1 General 2.2 Approved Materials

PD 3 APPLICATION C3-115

3.1 Surface Preparation 3.2 To Interior Surfaces 3.2.1 PVA Emulsion System 3.2.2 Gloss Enamel System 3.2.3 Stain and Varnish System 3.3 To Exterior Surfaces 3.3.1 Acrylic PVA System 3.3.2 Texture Coating System 3.3.3 Gloss Enamel System 3.3.4 Varnish System 3.4 To Roof Areas 3.4.1 Acrylic PVA System 3.5 To Non-Ferrous Surfaces 3.5.1 Galvanised Iron Roofs 3.5.2 Galvanised Iron Tubes etc 3.5.3 Aluminium Surfaces

PD 4 MEASUREMENT AND PAYMENT C3-117 PD 1 SCOPE

This painting specification covers the normal work required for small to medium size buildings. It does not include for the painting of steelwork (which is the subject to SABS 1200HC as amended by PSHC), apart from galvanised iron for roof sheeting, gutters, downspouts, etc.

This specification should be adhered to, but as the formulation of paints is subject to continual modification the specification for a particular material may be amended should the paint manufacturer recommend an improvement thereto and provided such amendment is agreed by the Engineer.

A change of specification purely to reduce costs by using less suitable materials will not be accepted, except with the specific approval of the Engineer in special circumstances.

PD 2 MATERIALS

PD 2.1 General

All materials which are to be used for painting under this contract shall be from the same approved manufacturer (except in special cases which have had prior approval from the Engineer) and shall be supplied in unopened cans. Thinning will be permitted only in conformity with the applicable manufacturers recommendations.

The approved manufacturer of the paints shall be either Plascon Paints (Pty) Ltd or Dulux (Pty) Ltd as selected by the Contractor. Other manufacturers products may be


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used subject to them being approved by the Engineer prior to any orders being placed.

PD 2.2 Approved Materials

The following materials, as supplied by the selected paint manufacturer, are approved for use under this Contract.

Applicable Clauses

Plascon References

Dulux Reference

Pre-paint treatment Bonding liquid 3.4.1 CVI.14 D192-0800 Knotting for timber 3.1 PK.2 G113-0816 Wood stopping 3.1 BS - Porous surface sealer 3.1 EPL 43 - Primers for: Acrylic coat filler 3.2.1 X.107 D184-1005 Plaster (alkali resistant) 3.2.1 UC.56 D192-0802 Hardboard 3.2.2 X.165 - Softwood timber 3.2.2 UC.2 D191-0801 Galvanised iron 3.5.1

3.5.2 G.I.P. D193-0856

Aluminium 3.5.3 SNK - Water-Based Paint Systems PVA emulsion 3.2.1 EPL D175-Line Acrylic PVA 3.3.1 P.3 D175-Line Texture coating 3.3.2 FLX D181-Line Acrylic roof paint 3.4.1 TRP D174-Line Oil-Based Paint Systems Universal undercoat 3.2.2,

3.3.3, 3.5.2

UC.1 D196-0763

Stain for wood 3.2.3 SPS G126-Line Alloyed roof paint 3.5.1 RP D252-Line Gloss enamel 3.2.2,

3.3.3, 3.5.2

G D232-Line

Varnishes Interior varnish for wood- matt

3.2.3 3.2.3

X.33 X.44

G126-0826 -

Exterior varnish for wood- gloss matts

3.3.4 3.3.4

- -

G126-0820 -


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PD 3 APPLICATION PD 3.1 Surface Preparation

All surfaces to be painted must be thoroughly degreased, clean and dry prior to commencement of painting. The local environs are to be free from dust whilst painting is in progress.

Ironmongery and fittings not to be painted shall either be removed and subsequently replaced or be suitably masked to prevent paint spots or streaks adhering to the surfaces.

All cracks are to be filled with the paint manufacturer’s recommended filler suitable for the purpose and for the location (ie interior or exterior work). After drying, the filler is to be rubbed down to a smooth surface, flush with the adjacent surfaces.

Porous surfaces must be sealed in accordance with the paint manufacturer’s recommendations.

Timber work shall be knotted and stopped as necessary prior to commencing painting.

All surface preparation shall be in accordance with the paint manufacturer’s specifications.

PD 3.2 Painting Interior Surfaces PD 3.2.1 PVA Emulsion System

3.2.1.1 Cement plaster Concrete

apply one coat of acrylic filler coat followed by two coats of PVA emulsion paint

3.2.1.2 Gypsum plaster

Hardwall plaster Gypsum board

Apply one coat of alkali resistant primer followed by two coats of PVA emulsion paint

3.2.1.3 Hardboard Apply one coat hardboard primer

followed by two coats of PVA emulsion paint

PD 3.2.2 Gloss Enamel System

3.2.2.1 Cement plaster Gypsum plaster Hardwall plaster Gypsum board

apply one coat of alkali resistant primer followed by one coat universal undercoat and one coat of gloss enamel

3.2.2.2 Hardboard apply one coat hardboard primer

followed by one coat of universal undercoat and one coat of gloss enamel

3.2.2.3 Softwood timber apply one coat of oil based wood

primer followed by one coat of universal undercoat and one coat of gloss enamel


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PD 3.2.3 Stain and Varnish System

3.2.3.1 Softwood timber apply one coat of stain followed by two coats of varnish (matt or gloss as ordered)

3.2.3.2 Hardwood timber apply two coats of varnish (matt or

gloss as ordered) PD 3.3 Painting Exterior Surfaces PD 3.3.1 Acrylic PVA System

3.3.1.1 Cement plaster Concrete

apply one coat of acrylic filler coat followed by two coats of acrylic PVA paint

3.3.1.2 Fibre-cement

board apply one coat of undercoat followed by two coats of acrylic PVA paint

PD 3.3.2 Texture Coating System

Cement plaster Concrete

plaster primer, acrylic fillercoat followed by two coats of texture coating paint

PD 3.3.3 Gloss Enamel System

Cement plaster as per 3.2.2.1 for interior surfaces Softwood timber as per 3.2.2.3 for interior surfaces

PD 3.3.4 Varnish System

Hardwood apply two coats of ultra violet resistant varnish (matt or gloss as ordered)

PD 3.4 To Roof Areas (Other than Galvanised Iron) PD 3.4.1 Acrylic PVA System

Cement tiles Clay tiles Asbestos tiles Asbestos sheets

apply one coat of bonding liquid followed by two coats of acrylic emulsion roof paint

PD 3.5 To Non Ferrous Metal Surfaces PD 3.5.1 Galvanised Iron Roofs

apply one coat G.I metal primer followed by one coat micaceous iron ore roof paint

PD 3.5.2 Galvanised Iron Tubes etc

apply one coat G.I metal primer followed by one coat universal undercoat and one coat gloss enamel

PD 3.5.3 Aluminium Surfaces

apply one coat of aluminium primer followed by one coat of universal


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undercoat and one coat of gloss enamel.

PD 4 MEASUREMENT AND PAYMENT

Measurement and payment for paintwork will not be made separately except where so scheduled in the schedule of quantities. In the latter case, the prices tendered are to cover for the provision of all materials, plant and labour necessary to prepare the surfaces and complete the work as specified. Payment will be made by lump sum for the entire painting work, or by individual sum for each unit scheduled, or by area.

Units : Lump Sum : Individual Sum m²


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PARTICULAR SPECIFICATION PE : PIPELINE VALVES FOR WATER SUPPLY APPLICATIONS

CONTENTS PAGE PE 1 SCOPE C3-118 PE 2 DEFINITIONS C3-118 PE 3 REQUIREMENTS C3-119

3.1 General 3.2 Materials, Workmanship and Construction 3.2.1 Wedge Gate Valves 3.2.2 Resilient Seal Valves 3.2.3 Reflux Valves 3.2.4 Butterfly Valves 3.2.5 Air Valves 3.3 Marking 3.4 End Connections 3.5 Drawings 3.6 Mounting Feet 3.7 Lifting Eyes 3.8 Protection Prior to Installation

PE 4 TESTING C3-122

4.1 Test Certificates 4.2 Test Requirements 4.2.1 Gate Valves 4.2.2 Reflux Valves 4.2.3 Butterfly Valves 4.2.4 Air Valves

PE 5 CORROSION PROTECTION C3-123

PE 1 SCOPE

This specification covers the material and constructional requirements for resilient seal, wedge gate, reflux, butterfly, air and scour valves.

PE 2 DEFINITIONS

Single small orifice air valve - A valve capable of releasing small accumulations of air at all pressures throughout the working pressure range of the pipeline.

Single large orifice air valve - A valve capable of admitting or expelling large quantities of air during emptying and filling of the pipeline.

Double orifice air valve - A valve capable of satisfactorily carrying out the functions of both a single small orifice air valve and a single large orifice air valve.


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PE 3 REQUIREMENTS

PE 3.1 General

The types, sizes, end connections, pressure ranges and other details of the valves

required are detailed on the specification data sheets. Other data sheets are included

to permit tenderers to offer variations to the specification to suit their standard

products.

PE 3.2 Materials, Workmanship and Construction

PE 3.2.1 Wedge Gate Valves

Wedge Gate valves must comply with SABS 664 or SABS 191 as applicable for

waterworks pattern valves.

Valves must also be provided with the following: a) Fully enclosed gearing, where necessary to limit the maximum torque to be

applied at the handwheel spindle or cap top to 120 Nm under an unbalanced pressure equal to the maximum working pressure for the classes scheduled;

b) The facility to permit re-packing of the gland whilst the valve is under working

pressure. c) Stainless steel jacking/limiting screws for valves with a nominal bore greater

than 600 mm and with metal gates.

PE 3.2.2 Resilient Seal Valves (RSV's)

In addition to the requirements of 3.2.1 above, RSV's shall be provided with the following:

a) Grade 304 stainless or EN57 steel spindles as scheduled. b) At least two nitrile rubber "O" sealing rings in a corrosion resistant housing, plus

one nitrile rubber wiper ring to prevent the ingress of dirt. PE 3.2.3 Reflux Valves'

Single door reflux valves must be cast iron, spheroidal graphite (SG) iron or cast steel and comply with SABS 144 or SABS 192 as applicable. Unless otherwise scheduled, gunmetal trim shall be provided for cast iron valves and stainless steel trim for cast steel valves.

Valves with a nominal bore greater than 600 mm must be of the double door or multi-door type and may be fitted with an integral bypass. In other respects they must be in accordance with the specifications for the single door type.

A suitable arrow indicating the flow direction through the valve shall be cast onto the body of the valve.

PE 3.2.4 Butterfly Valves

The valves must comply with BS 5155 for tight shut off service for the types, classes and sizes listed in the "specification data sheets" or scheduled.


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The basic materials for butterfly valves should be as follows:

a) Component

Class PN 10 Classes PN 16 + PN 25

Class PN 40

Body, disc handwheel

DN 350 to 600

Cast iron or SG Iron S G Iron

Cast Steel

DN over 600 mm

S G Iron

Cast Steel

Seating Ring

a) Separate b) Integral

Gun metal or stainless steel

Hard chrome coated

Stainless steel Nylon Coated

Shaft or stub shafts

Stainless Steel

Bearings

Vesconite, PTFE coated or other approved self-lubricating non-metallic material

Seal Clamp Rings

Bronze or stainless steel

Stainless steel Stainless steel

The bottom of the disc must move in the flow direction when opening. The valve shall be droptight under the maximum pressure rating condition.

The face to face dimensions shall be as set out in table 6 of BS 5155 in the column headed "double flanged short" for double flanged valves and in the column headed "wafer long" for wafer valves.

A suitable arrow indicating the preferred flow direction through the valve, where such preference is applicable, shall be cast onto the body of the valve.

Unless otherwise scheduled a side mounted manual actuator shall be provided. The actuator shall be a separate unit bolted to the main valve body on the side designated in the data sheets when facing in the normal direction of flow. Water must not leak past the main shaft and enter the actuator. An indicator which shows the extent of opening of the valve disc must be fitted.

The designated power source for the operation of a power operated actuator is given in the data sheets. The actuator shall comply generally with AWWA C 504, and shall be capable of withstanding opening and closing torques at least 30% in excess of those necessary under the maximum working condition using the designated power source.

All actuators, whether power operated or not, shall be supplied complete with horizontal handwheel at a height that provides for reasonable operation in each situation shown on the drawings. The handwheel shall comply with the relevant requirements of SABS 664. The hand wheel must be mounted on a vertical shaft and must require not more than 120 Nm of input torque to operate against a maximum unbalanced head equal to the pressure rating of the valve.

All power operated actuators are to be fitted with 'Open' and 'Closed' limit switches and a 4 - 20 mA position transmitter.

PE 3.2.5 Air Valves

The materials and workmanship employed in the manufacture of air valves shall be at least equal to the standard required by SABS 664 for waterworks pattern valves.


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PE 3.3 Marking

In addition to the requirement of SABS 144 or SABS regarding marking, all valves must be provided with an identification plate on which the following information shall be indelibly cast or embossed;

a) The item or tag number; b) The size or nominal bore of the valve; c) The class or working pressure of the valve.

PE 3.4 End Connections

End connections shall be flanged or screwed as scheduled. a) Flanges - Where flanged connections are specified the dimensions and drilling

of the flanges must comply with SABS 1123 except where otherwise scheduled. The front faces of flanges must be flat and normal to the bore of the valve. The back of the flanges, bonnets etc must be flat and normal to the bore or be spot-faced over an area large enough to freely accommodate the washer and the nut.

Drilled holes for the passage of bolts must be provided where wafer type butterfly valves are scheduled.

Flange gaskets must be CPAF with a minimum thickness of 3 mm. Bolts must comply with SABS 135 or SABS 136. Washers must conform to SABS 1149. All ferrous nuts, bolts and washers must be galvanized to SABS 763.

b) Screwed ends - Where screwed ends are specified the valve shall be threaded

to BSP. PE 3.5 Drawings

The supplier shall provide two paper prints of fully dimensioned drawings for each type of valve and actuator when requested by the Engineer.

PE 3.6 Mounting Feet

Valves with a nominal bore of 450 mm or greater must be provided with mounting feet where called for on the specification data sheets.

PE 3.7 Lifting Eyes

A lifting eye at the top of the valve body shall be provided, where the combined mass of the valve bypasses and actuator exceeds 75 kg.

PE 3.8 Protection prior to Installation

Valves shall be temporarily covered and protected against UV radiation at all times prior to installation.


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PE 4 TESTING

PE 4.1 Test Certificates

A test certificate shall be provided with each valve wherein it is certified that the valve has been inspected and tested and that it complies with the specification. An independent inspector may be appointed by the Employer to witness the testing, in such case the inspector must also sign the test certificate. The charges made by the independent inspector will be paid by the Employer.

At least three working days written notice must be given of the proposed date and time of the test. In the event that the valve(s) to be tested not being ready the Employer reserves the right to deduct any fruitless inspection costs from moneys due to the Contractor.

PE 4.2 Test Requirements

Hydraulic tests shall be carried out at the factory on each valve as follows:

PE 4.2.1 Gate Valves

In accordance with SABS 664 or SABS 191 (as applicable).

In addition to the test requirements in the applicable SABS specification all valves with a nominal bore greater than 450 mm shall be subjected to an open end gate strength test of 1,5 times the working pressure. Drop tightness in respect of this gate strength test is not required.

PE 4.2.2 Reflux Valves

In accordance with the requirements of SABS 144 or SABS 192 (as applicable) to the following pressures:

a) Body with clack open - 2,0 times class max working pressure b) Door strength - 2,0 times class max working pressure c) Seating with doors closed - 1,1 times class max working pressure, under which

pressure the seat must be drop tight

The door strength must be capable of withstanding the test pressure applied to the body without damage or distortion.

PE 4.2.3 Butterfly Valves

Each valve is to be tested at the factory in accordance with the requirements of BS 5155.

PE 4.2.4 Air Valves

Each valve is to be tested at the factory as follows: a) Body test - The valve shall be filled with water and a pressure equivalent to twice

the maximum working pressure shall be applied for 5 minutes. There shall be no loss of water from the valve during the test.

b) Low head leak test - Lower the pressure to 20 kPa and maintain the pressure for

5 minutes. There shall be no loss of water from the valve during the test c) Drop test - One valve taken at random from each batch of ten small orifice and

double orifice air valves (or less) shall be subjected to a "drop test". The valve


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shall be filled with water and pressurised to above the working pressure. While maintaining the pressure at least 200 kPa above the specified working pressure air shall be injected into the inlet of the air valve. Reduce the pressure slowly. The small orifice must open and discharge the air at a pressure not lower than the specified working pressure.

PE 5 CORROSION PROTECTION

The cleaning and corrosion protection of valves must be carried out at the factory prior to despatch to the Site. Non-ferrous metal or stainless steel surfaces must not be painted. The protection to be applied must comply with one internal and one external systems from the following alternatives:

System 1 (Epoxy resin paint) - All cast iron surfaces of every valve, other than RSV's, must be prepared for painting to a thoroughly clean condition free of all grease and deleterious matter. Ferrous surfaces must be prepared in accordance with the Swedish Standard SIS 05 5900 to an Sa 3 finish. Surfaces must then be coated with a

non-toxic epoxy resin paint to give a total minimum dry film thickness of 250µm to be pinhole free over the entire painted surface.

System 2 (Epoxy powder coating) - Electrostatically applied epoxy powder coating (ESPC), of the fully disassembled valves shall be carried out in accordance with SABS 1217 as may be modified by this specification. All RSV's are to be treated with this system.

All surfaces of the fully dis-assembled valve shall be blast cleaned to Sa 3 of Swedish

Standard SIS 05 5900, having an angular profile of 40µm to 60µm.

The coating medium shall be an exterior grade, tinted, non-toxic and non-tainting, suitable for use with potable water and applied strictly in accordance with the manufacturer's instructions in a single application to a minimum film thickness of 300

µm. The coated surface shall be subjected to a standard MEK 50 double rub test. Particular attention shall be given to the thickness and integrity of the coating in the areas where the gate of the RSV is to operate. Low voltage, wet sponge EID detection of pinholes is to be conducted on all surfaces of the valve. A visual inspection, to be carried out by an experienced observer, shall reveal the finished coating to be smooth and glossy, free from excessive runs, sags, "orange peel" finish, occlusions and other visible defects.

The coating shall be subjected to a "hot water soak" adhesive test at the inspector's discretion, and no more than 15 mm disbondment from the point of the "V" (cut at a 30

degree angle) shall be permitted after immersing in water at 78°C for 48 hours, and

testing adhesion after cooling to 25°C. Repairs shall be carried out using an approved repair system. (Hi-Cote" or similar approved).

System 3 (external only) - Apply multi coats of an approved epoxy coal tar paint to

give a minimum total dry film thickness of 240µm. The paint shall be applied in accordance with the paint supplier's recommendation.

System 4 (external only) - Apply one coat of zinc chromate primer followed by one coat of undercoat tinted where necessary, and a final coat of best quality gloss

enamel. The total dry film thickness of the system must be not less than 200µm.

After erection on site all valves must be cleaned and the paintwork refurbished where necessary to restore the condition to that pertaining at the time of leaving the factory.


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PARTICULAR SPECIFICATION PG: GRASSING

CONTENTS PAGE PG 1 SCOPE C3-124 PG 2 MATERIALS C3-124

2.1 Fertiliser/Soil - Improvement Material 2.2 Topsoil 2.3 Grass Sods 2.4 Hydroseeding

PG 3 CONSTRUCTION C3-125

3.1 Shaping 3.2 Planting Grass 3.3 Time for Planting

PG 4 ACCEPTABLE GRASS COVER C3-126 PG 5 MAINTENANCE C3-126

5.1 Watering, Weeding, Mowing and Replanting PG 6 MEASUREMENT AND PAYMENT C3-126

6.1 Principles 6.2 Grassing

PG 1 SCOPE

This specification covers the establishment of vegetation for functional purposes.

PG 2 MATERIALS PG 2.1 Fertiliser/Soil - Improvement Material

An approved compost material may be used as a soil improvement material, where required.

PG 2.2 Topsoil

Topsoil shall consist of fertile, friable soil of loamy character obtained from areas having a good coverage of vegetation, preferably grasses. It shall be free from deleterious matter such as large roots, stones, refuse, stiff or heavy clays and the seeds of noxious weeds.

Topsoil shall be stockpiled in separate loose heaps as tipped from trucks and shall not be stockpiled in heaps exceeding 2,0 m in height. Care shall be taken to prevent the compaction of topsoil in any way, especially by trucks driven over such material.

In the event of an insufficient quantity of topsoil being obtainable from the site or designated borrow areas the Contractor shall procure and furnish topsoil from other sources which have been approved by the Engineer.


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PG 2.3 Grass Sods

Grass sods shall be either nursery-grown or veld sods. Either type shall be harvested, delivered, planted and watered within 36 hours, unless otherwise agreed by the Engineer. The grass sods shall be free from noxious weeds and diseases. Sods obtained from a nursery shall be in moist soil not less than 30 mm deep, and sods from the veld in moist soil not less than 50mm deep.

Nursery-grown sods shall be of the variety of grass scheduled, unless the use of an alternative has been approved by the Engineer. The grass shall have been grown specifically for sod purposes, mown regularly and cared for to provide uniformity. It shall be harvested by purpose-made machines manufactured for this purpose to ensure an even depth of cut whilst maintaining sufficient root material and soil in the sods.

Veld sods may be obtained from approved areas within the site where a suitable type and density of grass are found in a suitable soil.

PG 2.4 Hydroseeding

The Contractor shall be solely responsible for establishing an acceptable grass cover and any approval by the Engineer of seed or seed mixtures proposed for use shall not relieve the Contractor from this responsibility.

Cellulose pulp shall be added to the hydroseeding mix at a rate of 25 kg of pulp per kilolitre of water for use on steep slopes and where ordered by the Engineer.

When the use of anti-erosion compound such as 'Surfasol' is required and such compound is to be applied simultaneously with the hydroseeding, it shall be mixed with the hydroseeding mixture before application. In such cases the amount of cellulose pulp shall be decreased by one-third to one-half, depending upon the amount of Surfasol added.

PG 3 CONSTRUCTION PG 3.1 Shaping

Areas within the site which require shaping shall be excavated, filled, compacted when required and shaped to the correct contours as shown on the drawings or as directed by the Engineer. Such work shall be regarded as being earthworks and measurement and payment shall be made in accordance with the requirements of SABS 1200D or SABS 1200DA (as applicable).

PG 3.2 Planting Grass

Areas to be grassed by sodding shall be thoroughly watered beforehand so that they are wet to a depth of at least 150 mm. The surface shall be slightly roughened to ensure good penetration of roots into the soil. Sods before laying, shall be protected against drying out and shall be kept moist from the time of harvesting until finally placed.

The first row of sods shall, where possible, be laid in a straight line and if on a slope starting at the bottom of the slope. The sods shall be butted tightly against each other, care being taken not to stretch or overlap sods. Where a good fit cannot be obtained, the intervening space shall be filled with topsoil. The next row shall be placed in the same manner tightly against the previous row with the joints staggered and so on until the full area is covered. On steep slopes, when instructed by the Engineer, the sods shall be held in position by sufficient wooden stakes to prevent movement.


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Plugs or roots shall be planted at 250 mm centres. Roots shall either be taken from grass stockpiles on site or buffalo grass roots or Cynoden (Kweek) from commercial sources.

The grass shall be watered after placing to prevent unduly rapid drying out.

PG 3.3 Time for Planting

Grass shall be planted as far as is practicable during periods most likely to produce best growing results. The Contractor shall make every effort to programme his operations such that grass shall be planted during these periods (September to November).

PG 4 ACCEPTABLE GRASS COVER

An acceptable grass cover shall mean that not less than 75% of the area planted or hydroseeded shall be covered with grass within a period of 3 months after planting and that no bare patches of more than 500 mm maximum dimension shall occur. In the case of sodding, acceptable cover shall mean that the entire area shall be covered with live grass within 3 months after sodding.

PG 5 MAINTENANCE PG 5.1 Watering, Weeding, Mowing and Replanting

All sodded and planted areas shall be adequately watered at regular and frequent intervals to ensure the proper germination of seeds and growth of grass until the grass has established an acceptable cover and continued thereafter until handed over to the Employer. The quantity of water and the frequency of watering shall be subject to the Engineer's approval. With hydroseeding the commencement of watering may be postponed until a favourable time of the year, but watering shall commence as soon as the seeds have germinated and growth has started.

Weeds shall be controlled by an approved means.

Any bare patches where the grass has not taken or where it has been damaged or has dried out shall be re-cultivated, planted, sodded or hydroseeded at the Contractor's expense.

PG 6 MEASUREMENT AND PAYMENT PG 6.1 Principles

1) Shaping of areas prior to topsoiling, and trimming shall be regarded as

earthworks and measured and paid in accordance with the requirements of SABS 1200D or SABS 1200DA (as applicable).

2) The rates covered and paid for in accordance with this Specification shall include

for the provision of all labour, plant, materials and transport necessary to complete the specified work including maintenance.

PG 6.2 Grassing

Sodding using: i) Nursery-grown sods (type of grass specified) Unit : m2 ii) Veld sods Unit : m² iii) Roots of buffalo grass or Cynoden (kweek) Unit : m² iv) Plugs of buffalo grass or Cynoden (kweek) Unit : m² v) Roots of grass from stockpiles on site Unit : m²


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vi) Hydroseeding Unit : ha

The rates shall cover the cost of supplying the materials, planting, sodding or hydroseeding, watering until hand-over to the Employer, establishing, weeding, maintaining and all incidentals necessary for establishing the specified cover.


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PARTICULAR SPECIFICATION : PH

PH : STEEL SECURITY FENCE AND SITE PERIMETER HOARDING

PH 1 SCOPE PH 1.1 This specification covers the general requirements for a steel security fence for use

under severe corrosive conditions and site perimeter hoarding in P3. PH 2 INTERPRETATION PH 2.1 Supporting Specification

Where this specification is required for a project either SABS 1200 AA or 1200 A shall form part of the contract document.

PH 2.2 Applicable Edition of Standards

Each standard specification referred to in this specification shall be deemed to be the latest edition, including all amendment issued by the relevant body, published three calendar months or more before the closing date for receipt of tenders.

PH 2.3 Definitions

For the purposes of this specification, the following definitions shall apply: Acceptable. Acceptable to the Employer Aperture. An opening between two adjacent wires of the mesh Intermediate Post. A fencing member that supports the straining wires Member. A term that embraces one or more posts, and stays Stay. A member of the fence connected to a straining post and so

embedded in the ground at an angle as to assist the straining post and its extension arm in withstanding the pull of the straining wires and the barbed wires

Straining post. A member of the fence that withstands the pull of the straining wires and, in addition and when relevant, supports a gate

PH 3 MATERIALS PH 3.1 Posts

Straining posts, which include corner and gate posts, shall be manufactured from 70 x 70 x 6mm x 3m high HDG angle iron with 500mm overhang including cover strip M8 cup square and sheer nuts (all stainless steel).

Top rails shall be 40 x 40 x 3mm x 3m high HDG angle iron with serrated cox comb on top. Bottom rails shall be 40 x 40 3mm x 3m high HDG angle iron

PH 3.4 Mesh

Mesh shall be 358 double panel mesh panel fence with BTC coil on top and 3 coil laid in front of fence.


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double wire mesh PH 3.6 Gates

Double swing gate- 5000mm wide x 3000mm high + extension. Pedestrian Gate- 1200mm wide x 3000mm high + extension Gate Posts - 150 x 150 x 3000 high + extension square tubular steel hot dip

Galvanized with lock box. Flatwrap: 500 Diameter flatwrap securely tied to 3 strands of barbed wire.

Double swing gate Gates shall be erected such that: a) There is a gap of not less than 35 mm and not more than 75 mm between the

hinge stile(s) and the straining posts: b) There is a clearance of not less than 50 mm and not more than 75 mm between

the bottom horizontal frame member(s) and the ground; and c) When closed, there is a space of not more than 15 mm between the closing stile

and the straining post on the case of single-leaf gates, and between the two closing stiles in the case of double-leaf gates.

PH 3.14 Concrete

Concrete shall be at least Grade 25 concrete, unless otherwise called for in either Specification of the Schedule of Quantities.

PH 4 TOLERANCES PH 5.1 Out-of-straightness of any member shall not exceed 3 mm/m length of the member.


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PH 5 SITE PERIMETER HOARDING

PH 5.1 General

A portion of P3 will be fenced off to protect the public with hoarding to isolate the Works from the general public. The Contractor shall provide and maintain in a proper condition the hoarding as well as all necessary barricades, lights, warning signals and all direction signs necessary to enable pedestrians and traffic to follow the routes of diversion. Where required, the Contractor shall provide flagmen at all deviations and/or obstructions. Two types of hoarding is used at Cape Town International airport. These are Type E, which is utilised for airside projects and Type F which is used on landside projects. The following describes the hoarding requirements.

Type E

The sheet metal hoarding must be a minimum of 2000mm high around the perimeter of the construction site establishment. (see detail B) Construction and Material The IBR/Corrugated sheeting must be fixed onto steel or timber posts, with horizontal steel members positioned at the top, centre and bottom to secure the sheeting firmly. The sheet metal is to extend to ground level or floor finish level i.e.: no gaps are permitted.


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Painting Internal hoarding will be mainly grey cambrink melamine on the public side and where painting is used, it must match the grey cambrink melamine. In the other side where plane chipboard or plasterboard is used and the area utilised as a temporal office, then the walls will be painted with white contractors PVA. All external types hoarding will be painted and all paint types must be as per specification unless changed by the ACSA-CTIA Project Manager. Painting specifications For IBR/Corrugated sheeting paint spec: PLASCON WALL & WALL. TEAL RAL 5021. The supporting posts are to be painted in PLASCON WALL & WALL. TEAL RAL 5021.

Corner Protectors

Internal hoarding to have aluminium corner protectors to match the height of the melamine chipboard panels used and the size to be 50 mm X 50 mm. External hoarding to have no corner protectors but the contractor to finish of the corners neatly i.e. with corner flashing to protect public from being injured.

Signage

All hoarding should have enough signage to inform the general public of the construction process. The signage should NOT apologise, and instead read: “WE THANK YOU FOR YOUR PATIENCE DURING CONSTRUCTION”


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Type F

This hoarding must remain in place for the duration of the construction period and is only removed at the end of construction when all the work has been completed.


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PH 6 BASE OF MEASUREMENT AND PAYMENT PH 6.1 Clearing and Grubbing Line of Fence.................................................................. Unit : m

The price for clearing and grubbing shall cover the cost of clearing a 2 m wide strip (1 m on either side of the fence centre line) along the entire length of the fence, removing boulders of size up to 0,15 m³, grubbing of trees of girth up to 1 m, grubbing of tree stumps, cutting of trunks and branches exceeding 0,5 m girth into transportable lengths, backfilling of cavities and removing, transporting and disposing of material thus cleared, grubbed and cut.

Boulders exceeding 0,15 m³ and removal and grubbing of trees exceeding 1 m girth shall be paid for separately.

PH 6.2 New Pump Station Perimeter Fencing ................................................................. Unit : m

The price for fencing includes for all setting out, supplying, transporting and erection of the fence, all as specified. The measured length shall include the length of all gateways. Rate shall include setting out, transporting and erection, mesh panels, all posts, stays, concrete foundations etc.

PH 6.3 Entrance Gate ..................................................................................................... Unit : sum

The price includes for the extra cost over PH 6.2 for supplying, transporting and erection of single gates and double gates (each comprising a pair of gates).

PH 6.5 Site Perimeter Hoarding ........................................................................................ Unit : m

The price for hoarding includes for all setting out, supplying, transporting and erection of the hoarding, all as specified. The measured length shall include the length of all gateways. The rate includes for setting out, materials (IBR Sheeting, paint, corner protectors, signage, etc), supply, transporting and erection as specified.

PH 7 STANDARD SPECIFICATIONS REFERRED TO

Reference is made to the following standards: SABS 135 ISO Metric Black Bolts, Screws and Nuts SABS 675 Zinc-Coated Fencing Wire ISO 1461-1999 Hot-Dip Zinc Coatings SABS 1149 Flat and Tape Steel Washers

CKS 229 Chain Link Wire Fencing (Diamond Mesh) CKS 280 Padlocks CKS 451 Anti-Intruder Fences