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09-935 Issue 4 13 January 2012

PriDE

DMRC HEADLEY COURT PATIENTS CAR PARK AND ACCESS IMPROVEMENTS

(HAA10859)

TECHNICAL SPECIFICATION

PROJECT NUMBER 09-935

Brunel Design Group Chartered Engineers and Architects

High Walls

21-23 East Street

Fareham

Hampshire PO16 0BZ

Telephone 01329 238238

Fax 01329 238237

[email protected]

DMRC Headley Court Patients Car Park

09-935 Issue 4 13 January 2012 Page 2 of 40

DOCUMENT AUTHORISATION Prepared by: Salim M Rahman

Signed: Date: 13 January 2012 Reviewed by: Noor Awan

Signed: Date: 13 January 2012



CONTENTS

DRAWING LIST 4

SCOPE OF WORKS 4

C10 SITE WASTE MANAGEMENT PLAN 6

C20 DEMOLITION 7

D20 EXCAVATING AND FILLING 9

E10 MIXING/ CASTING/ CURING IN SITU CONCRETE 11

E20 FORMWORK FOR IN SITU CONCRETE 12

E41 WORKED FINISHES TO IN SITU CONCRETE 12

F10 BRICK/ BLOCK WALLING 12

L30 STAIRS/ LADDERS/ WALKWAYS/ HANDRAILS/ BALUSTRADES 14

P35 TRENCHES/ PIPEWAYS/ PITS FOR BURIED ENGINEERING SERVICES 14

Q10 KERBS/ EDGINGS/ CHANNELS/ PAVING ACCESSORIES 15

Q20 GRANULAR SUB-BASES TO ROADS/ PAVINGS 16

Q22 ASPHALT ROADS/ PAVINGS Error! Bookmark not defined.

Q23 GRAVEL/ HOGGIN/ WOODCHIP ROADS/ PAVINGS 17

Q24 INTERLOCKING BRICK/ BLOCK ROADS/ PAVINGS 18

Q25 SLAB/ BRICK/ SETT/ COBBLE PAVINGS 20

Q28 TOPSOIL AND GROWING MEDIA 21

Q40 FENCING 22

Q50 SITE/ STREET FURNITURE/ EQUIPMENT 23

V95 ELECTRICAL SYSTEMS 30

Z10 PURPOSE MADE JOINERY 36

Z11 PURPOSE MADE METALWORK 36

Z12 PRESERVATIVE/ FIRE RETARDANT TREATMENT 37

Z20 FIXINGS AND ADHESIVES 38

Z21 MORTARS 39

Z22 SEALANTS 40



DRAWING LIST

AS 001 Location Plan & Existing Site Plan AL 001 Proposed Site Plan AL 002 Proposed Car Park Layout AD 001 Proposed Path & Step Details AD 002 Proposed Car Park Details EB 001 External Lighting & Electrical Distribution EB 002 External Lighting Car Park

SCOPE OF WORKS

Standard Documents

The Defence Estates (DE) printed standard specifications referred to in this specification may be purchased from The Stationery Office. Additionally they may be accessed from the Defence Estates web site: http://www.defence-estates.mod.uk/publications/publications.php All other Defence Estates publications including Safety Rules and Procedures and JSPs referred to in this specification may also be accessed through this Defence Estates web page. Site Waste Management Plan These works are subject to the requirements of the Site Waste Management Plans Regulations 2008. Extent of the Works The works shall comprise the whole of the labour and all the materials necessary, including tests, adjustments and commissioning, to give an effective working completed construction to the satisfaction of the Project Manager. The words completed construction shall mean the items conveyed by this Specification, and all incidental sundry components and works necessary for the complete execution and for the proper operation of the works, whether or not these sundry components or works are mentioned in detail in the tender documents issued in connection with the contract.



Schedule The contract includes the following works:

A) Excavation & removal of existing surface to car park area and provision of new permeable block paved surface to car parking bays and standard concrete block paving to roads and entry and exit areas with kerbed edging and road marking for 179 no. parking spaces & way-finding as per drawing AL-002.

B) Provide pedestrian access area from car park with tactile surfaces to denote crossing and buff coloured, drop kerbs and demarcations.

C) Protect and preserve during construction: trees and roots of trees, surface and buried drainage pipelines, electrical installations including the medium voltage overhead line and buried cables.

D) Car park construction is to be phased in two parts to enable half of the area to remain in use during the course of the works. Details shall be agreed with the PM.

E) Provision of new blocked paved footpath with concrete edging from car park towards entrance of site at max. gradient of 1 in 20 with level landings at every 500mm rise and short flights of steps and retaining walls with brick copping.

F) Provision of paved seating areas with benches adjacent to new path. G) Provide protection rail to lighting columns. H) Regrading of grassed topsoil adjacent paths and steps to suit new levels. I) Provision of way-finding signage on vertical posts set into concrete bases. J) Provide retaining wall on the side of steps with mowing strip paving and re-grade

grassed topsoil to suit. Provide lighting bollards and DDA compliant handrail system, not cold to touch finish.

K) Provide wiring access ducts under all paved surfaces and connect into the base of each lighting bollard or street lamp in hard surfaces provide for the tube to enter the column base for loop in wiring.

L) Lighting to car park: road lighting columns and PIR controlled LED luminaires to comply with BS5489-1, lighting to access path: low height bollard PIR controlled LED luminaires located as indicated. Electrical single phase power supply from building 53: Supply Flight, in RCD protected circuits as indicated and with photocell control of the whole installation. Lighting of signs by post mounted self contained photovoltaic LED luminaires.

M) Before handover provide test results, as built drawings and building maintenance documents for all the works. A specialist shall be employed for this task.

N) The Geotechnical Site Investigation report must be referred to and due allowance made for any recommendations contained in the report. See Geotechnical report LW22050 dated 30 March 2011 (obtainable from the project manager).

O) Particular attention should be paid to the excavation of contaminated ground and potential presence of faecal coliforms.



C10 SITE WASTE MANAGEMENT PLAN 01 SITE WASTE MANAGEMENT PLAN The contractor is required to develop and implement the Site Waste Management

Plan to achieve good practice waste management on the project. Therefore, the contractor is required to include in their tender details of how the SWMP will be developed and implemented with specific reference to the constraints of the project, the management of these constraints, their supply chain, programme of key steps and reviewing performance. This should include a list of measures to minimise waste generated from on-site operations (for example damage, theft etc).

Where relevant, the contractor shall employ a systematic approach to good practice

in the recycling and re-use of locally available construction, demolition and excavation waste materials (on-site and from nearby sites)-for example, applying the methodology outlined in the Demolition Protocol (published by ICE, London Remade and Envirocentre), where a demolition element forms part of the contract.

With regards to the Client's project objective for good practice waste minimisation and

management, the Contractor's responsibilities under this Contract are to: meet the agreed minimum recovery rates for the specific waste streams included on

the `List of agreed Quick Win waste streams' unless otherwise agreed in writing by the Client;

develop and implement the SWMP in accordance with the methodology included in the contract documents and undertake the measures to minimise waste contained therein;

measure waste arising during the works and compare with the minimum recovery rates set under this Contract and then report these findings to the Project Manager in a form to be agreed every 4 weeks at project meetings, including measures to be implemented to meet the minimum recovery rates if actual recovery is below target;

appoint trade sub-contractors and waste management contractors with the same liability as under this Contract to meet minimum recovery rates (where applicable) and to support the Contractor to measure, monitor and report actual waste arising during the works; and

ensure compliance of all appointed trade sub-contractors and waste management contractors with the legal requirements under the Duty of Care regulations and taking all reasonable actions as appropriate for non-compliance.

Recycled Content At least 10% of the total value of materials used should derive from recycled and

reused content in the products and materials selected. In addition, show that the most significant opportunities to increase the value of materials derived from recycled and reused content have been considered, such as the top ten Quick Wins or equivalent, and implement good practice where technically and commercially viable."

Standards No part of this clause shall be taken to imply a reduction or derogation of the

standards expressed in this specification, the drawings or other documents referred to directly or indirectly in this specification or the drawings.



C20 DEMOLITION To be read with Preliminaries/ General conditions. 05 SURVEY - Scope: Before starting deconstruction/ demolition work, examine available

information, and carry out a survey of: - the structure or structures to be deconstructed/ demolished, - the site on which the structure or structures stand, and - the surrounding area. - Report and method statements: Submit, describing: - Form, condition and details of the structure or structures, the site and the

surrounding area. - Type, location and condition of features of historical, archaeological, geological or

ecological importance. - Type, location and condition of adjoining or surrounding premises that might be

adversely affected by removal of the structure or structures or by noise, vibration and/ or dust generated during deconstruction/ demolition.

- Identity and location of services above and below ground, including those required for the Contractor's use, and arrangements for their disconnection and removal.

- Form and location of flammable, toxic or hazardous materials, including lead-based paint, and proposed methods for their removal and disposal.

- Form and location of materials identified for reuse or recycling, and proposed methods for removal and temporary storage.

- Proposed programme of work, including sequence and methods of deconstruction/ demolition.

- Details of specific pre-weakening required. - Arrangements for protection of personnel and the general public, including

exclusion of unauthorized persons. - Arrangements for control of site transport and traffic. 10 EXTENT OF DECONSTRUCTION/ DEMOLITION - General: Subject to retention requirements specified elsewhere, deconstruct/

demolish structures down to foundation level to clear proposed car park area. 25 LOCATION OF SERVICES - Services affected by the Works: Locate and mark positions. - Mains services marking: Arrange with the appropriate authorities for services to be

located and marked. 30 SERVICES DISCONNECTION ARRANGED BY CONTRACTOR - Responsibility: Before starting deconstruction/ demolition arrange with the appropriate

authorities for disconnection of services owned by those authorities and removal of associated fittings and equipment.

31 SERVICES DISCONNECTION ARRANGED BY EMPLOYER - Responsibility: The Employer will arrange disconnection of services and removal of

fittings and equipment owned by those authorities prior to deconstruction/ demolition. - Timing: Do not start deconstruction/ demolition until disconnections are completed. 32 DISCONNECTION OF DRAINS - General: Locate, disconnect and seal disused foul and surface water drains. - Sealing: Permanent, and within the site.



35 LIVE FOUL AND SURFACE WATER DRAINS - General: Protect drains and fittings still in use. Keep free of debris and ensure normal

flow during deconstruction/ demolition work. - Damage: Make good damage arising from deconstruction/ demolition work. Leave

clean and in working order at completion of deconstruction/ demolition work. 40 SERVICE BYPASS CONNECTIONS - General: Provide as necessary to maintain continuity of services to occupied areas of

the site on which the deconstruction/ demolition is taking place and to adjoining sites/ properties.

- Notice: Give adequate notice to adjoining owners and all affected occupier if shutdown is necessary.

45 SERVICES TO BE RETAINED - Damage to services: Give notice, and notify relevant service authorities and/ or

owner/ occupier regarding damage arising from deconstruction/ demolition. - Repairs to services: Complete as directed, and to the satisfaction of the service

authority or owner. 50 WORKMANSHIP - Standard: Demolish structures in accordance with BS 6187. - Operatives: Appropriately skilled and experienced for the type of work. Holding, or in

training to obtain, relevant CITB Certificates of Competence. - Site staff responsible for supervision and control of work: Experienced in the

assessment of risks involved and methods of deconstruction/ demolition to be used. 55 SITE HAZARDS - Precautions: Prevent fire and/ or explosion caused by gas and/ or vapour from tanks,

pipes, etc. - Dust: Reduce by periodically spraying with an appropriate wetting agent, or contain. - Lead dust: Submit method statement for control, containment and clean-up

regimes. - Site operatives and general public: Protect from vibration, dangerous fumes and dust

arising during the course of the Works. 60 ADJOINING PROPERTY - Temporary support and protection: Provide. Maintain and alter, as necessary, as

work proceeds. Do not leave unnecessary or unstable projections. - Defects: Report immediately on discovery. - Damage: Minimize. Repair promptly to ensure safety, stability, weather protection and

security. - Support to foundations: Do not disturb. 65 STRUCTURES TO BE RETAINED - Extent: Blockwork storage compounds to south-west corner of site. - Parts which are to be kept in place: Protect. - Interface between retained structures and deconstruction/ demolition: Cut away and

strip out with care to minimize making good. 70 PARTLY DECONSTRUCTED/ DEMOLISHED STRUCTURES - General: Leave partly in a stable condition, with adequate temporary support at each

stage to prevent risk of uncontrolled collapse. Make secure outside working hours.



- Temporary works: Prevent overloading due to debris. - Access: Prevent access by unauthorized persons. 71 DANGEROUS OPENINGS - General: Provide guarding at all times, including outside of working hours. Illuminate

during hours of darkness. - Access: Prevent access by unauthorized persons. 76 ASBESTOS-CONTAINING MATERIALS - UNKNOWN OCCURRENCES - Discovery: Give notice immediately of suspected asbestos-containing materials when

discovered during deconstruction/ demolition work. Avoid disturbing such materials. - Removal: Submit statutory risk assessments and details of proposed methods for

safe removal. 78 UNFORESEEN HAZARDS - Discovery: Give notice immediately when hazards, such as unrecorded voids, tanks,

chemicals, are discovered during deconstruction/ demolition. - Removal: Submit details of proposed methods for filling, removal, etc. 80 OPEN BASEMENTS, ETC. - Temporary support: Leave adequate buttress walls or provide temporary support to

basement retaining walls up to ground level. - Safety: Make the remaining sections of retaining and buttress walls safe and secure. - Water movement: Make holes in basement floors to allow water drainage. Provide a

600 mm diameter hole for every 10 m. 85 SITE CONDITION AT COMPLETION - Debris: Clear away and leave the site tidy on completion. 86 SITE LEVELS AT COMPLETION - Levels: Grade the site to follow the levels of adjacent areas. 90 CONTRACTOR'S PROPERTY - Components and materials arising from the deconstruction/ demolition work: Property

of the Contractor except where otherwise provided. - Action: Remove from site as work proceeds where not to be reused or recycled for

site use. 95 RECYCLED MATERIALS - Materials arising from deconstruction/ demolition work: Can be recycled or reused

elsewhere in the project, subject to compliance with the appropriate specification and in accordance with any site waste management plan.

D20 EXCAVATING AND FILLING 04 SITE INVESTIGATION - Report: The report will be commissioned and issued by the Project Manager prior to

tendering the works. 10 PREPARATORY WORK - Trees, shrubs and hedges to be removed: Cut down, grub up main roots and fill

voids.



- Trees to be retained: Protect area around the trunk and do not use for building purposes or material storage.

- Clear site of rubbish and vegetation. Grub up large roots. - Arisings: Remove from site. 20 STRIPPING TOPSOIL - General: Excavate from areas where there will be regrading or construction work. - Depth of removal: 300mm. 30 OBSTRUCTIONS - Recorded foundations, beds, drains, etc: Break out and seal off drain ends. Remove

contaminated earth. - Unrecorded foundations, beds, basements, filling, tanks, service pipes, drains, etc:

Give notice. 40 SURPLUS EXCAVATED MATERIAL - Topsoil: Spread and level on site. - Remaining material: Remove from site. 50 HAZARDOUS, AGGRESSIVE OR UNSTABLE MATERIALS - Generally: Do not import or use fill materials which would, either in themselves or in

combination with other material or ground water, give rise to a health hazard, damage to building structures or instability in the filling.

53 WATER - General: Keep excavations free from water until foundations and below ground

constructions are completed. 55 PLACING FILL GENERALLY - Excavations and areas to be filled: Free from loose soil, rubbish and standing water. - Freezing conditions: Do not use frozen materials or materials containing ice. Do not

place fill on frozen surfaces. - Fill against structures, membranes or buried services: Place and compact in a

sequence and manner which will ensure stability and avoid damage. 62 FROST SUSCEPTIBILITY - General: Except as allowed below, fill must be non frost-susceptible as defined in

Highways Agency Specification for highway works, clause 801.17. - Frost-susceptible fill: Use only within the external walls of buildings below spaces that

will be heated. Protect from frost during construction. 65 HARDCORE - Fill: Granular material, free from harmful matter and excessive dust or clay, well

graded, all pieces less than 75 mm in any direction, and in any one layer only one of the following:

- Crushed hard rock or quarry waste. - Crushed concrete, brick or tile, free from plaster. - Gravel or hoggin. - Filling: Spread and level both backfilling and general filling in layers not exceeding

150 mm. Thoroughly compact each layer. 67 VENTING HARDCORE LAYER



- Fill: Clean granular material, well graded, passing a 75 mm BS sieve but retained on a 20 mm BS sieve, and in any one layer only one of the following:

- Crushed hard rock. - Crushed concrete, crushed brick or tile, free from plaster. - Gravel. - Filling: Spread and level in 150 mm maximum layers. Thoroughly compact each

layer, whilst maintaining enough voids to allow sufficient venting. 75 BLINDING TO HARDCORE - Surfaces to receive sheet overlays or concrete: Blind with: - Concrete where shown on drawings; or - Sand, fine gravel, or other approved fine material applied to provide a closed

smooth surface. - Permissible deviation on surface level: +0 -25mm.

E10 MIXING/ CASTING/ CURING IN SITU CONCRETE 15 SPECIFICATION - Concrete generally: To BS 8500-2 - Exchange of information: Provide concrete producer with information required by BS

8500-1, clauses 4 and 5. 25 BASIC DESIGNATED CONCRETE TO EXTERNAL STAIRS - Designation: RC25/30. - Coarse recycled aggregates: Permitted. - Consistence class: S2. - Additional requirements: Submit proposals. - Stair nosing: Safety edging GRP strip to stair nosing in white colour as per

manufacturers recommendations. 26 PRESCRIBED CONCRETE TO OTHER WORKS - Designation: As stated on drawings. - Coarse recycled aggregates: Permitted. - Consistence class: S3. 45 PROPERTIES OF FRESH CONCRETE - Adjustments to suit construction process: Determine with concrete producer. Maintain

conformity to the specification. 50 PREMATURE WATER LOSS - Requirement: Prevent water loss from concrete laid on absorbent substrates. - Underlay: Polyethylene sheet 250 micrometres thick. - Installation: Lap edges 150 mm. 60 PLACING AND COMPACTING - Surfaces to receive concrete: Clean, with no debris, tying wire clippings, fastenings or

free water. - Timing: Place as soon as practicable after mixing and while sufficiently plastic for full

compaction. - Temperature limitations for concrete: 30C (maximum) and 5C (minimum). Do not

place against frozen or frost covered surfaces.



- Compaction: Fully compact to full depth to remove entrapped air especially around reinforcement, cast-in accessories, into corners of formwork and at joints. Continue until air bubbles cease to appear on the top surface.

- Methods of compaction: To suit consistence class and use of concrete. 70 CURING AND PROTECTING - Evaporation from surfaces of concrete: Prevent throughout curing period. - Surfaces covered by formwork: Retain formwork in position and, where necessary

to satisfy curing period, cover surfaces immediately after striking. - Top surfaces: Cover immediately after placing and compacting. Replace cover

immediately after any finishing operations. - Curing periods: - Surfaces which in the finished building will be exposed to the elements, and

wearing surfaces of floors and pavements: 10 days (minimum). - Other structural concrete surfaces: 5 days (minimum). - Protection: Protect concrete from shock, indentation and physical damage.

E20 FORMWORK FOR IN SITU CONCRETE 70 FORMWORK - General: Accurately and robustly constructed to produce finished concrete to the

required dimensions. - Formed surfaces: Free from twist and bow with intersections, lines and angles

square, plumb and true. - Joints between forms and completed work: Prevent loss of grout and formation of

steps. - Holes and chases: Form with inserts or box out as required.

E41 WORKED FINISHES TO IN SITU CONCRETE 10 FINISHING - Timing: Carry out at optimum times in relation to setting and hardening of concrete. - Prohibited treatments to surfaces: - Wetting to assist surface working. - Sprinkling cement. 20 SMOOTH FLOATED FINISH - Surface on completion: Even, with no ridges or steps. 30 TROWELLED FINISH - Surface on completion: Uniform, smooth but not polished, free from trowel marks and

blemishes, and suitable to receive specified flooring material. 40 TROWELLED FINISH FOR WEARING SURFACES - Surface on completion: Uniform and smooth, free from trowel marks and blemishes.

F10 BRICK/ BLOCK WALLING To be read with Preliminaries/ General conditions.



05 FACING BRICKWORK ABOVE DPC - Bricks: To BS EN 771-1. - Manufacturer: Hanson Building Products. - Special shapes: To BS 4729. - Mortar: As section Z21. - Standard: To BS EN 998-2. - Additional requirements: Brick copping and other requirements as per manufacturers

written recommendations. - Mix: 1:1:6 cement:lime:sand. - Bond: Stretcher. - Joints: Flush. 45 ENGINEERING BRICKWORK - Bricks: To BS EN 771-1. - Manufacturer: Hanson Building Products. Product reference: Earth retaining wall, brick below dpc level. - Type: HD. - Mean compressive strength: Category: Class B. - Water absorption: To BS EN 772-7. - Freeze/ thaw category: F2. - Active soluble salts content category: S2. - Additional requirements: None. - Mortar: As section Z21. - Standard: To BS EN 998-2. - Mix: 1:0.25:3 cement: lime: sand. - Additional requirements: None. - Bond: Stretcher. - Joints: Flush. 51 BASIC WORKMANSHIP - Bond where not specified: Half lap stretcher. - Mortar joints: Fill all vertical joints. Lay bricks, solid and cellular blocks on a full bed. - AAC block thin mortar adhesive and gypsum block adhesive joints: Fill vertical joints.

Lay blocks on a full bed. - Clay block joints: - Thin layer mortar: Lay blocks on a full bed. - Interlocking perpends: Butted. - Quoins and advance work: Rack back. - Locations for equal levelling of cavity wall leaves: - Every course containing vertical twist type ties or other rigid ties. - Every third tie course for double triangle/ butterfly ties. - Courses in which lintels are to be bedded. - Lift height (maximum) for walling using cement gauged or hydraulic lime mortar: 1.2

m above any other part of work at any time. - Daily lift height (maximum) for walling using cement gauged or hydraulic lime mortar:

1.5 m for any one leaf. - Lift height (maximum) for walling using thin joint mortar glue: 1.3 m above any other

part of work at any time.



55 FACEWORK - Commencement of facework: Not less than 150 mm below finished level of adjoining

ground or external works level. - Brick/ block selection: Do not use units with damaged faces or arrises. - Cut masonry units: Where cut faces or edges are exposed cut with table masonry

saw. - Coursing brickwork and concrete blockwork: Evenly spaced using gauge rods. To

produce satisfactory junctions and joints with built-in elements and components.

L30 STAIRS/ LADDERS/ WALKWAYS/ HANDRAILS/ BALUSTRADES 60 HANDRAILS AND BALUSTRADES TO CONCRETE PATH - Manufacturer: Kee Safety Ltd, 1 Boulton Road, Reading, Berkshire, RG2 0NH. Tel:

01189 311022 Fax: 01189 311146. Email: [email protected] Web: http://www.keesafety.com/uk

- Product reference: Kee Access. - Component material and finish as delivered: Kee Access DDA Compliant Handrail

System. - Materials: Malleable Cast iron Kee Access components and hot dip galvanised steel

tubing.

- Finish: Polyester Powder Coat finish to RAL colour Blue (TBC), to ensures a not cold to touch finish.

- Handrails Diameter: 42.4mm for handrails & 48.3mm for uprights. - Other requirements: As per manufacturers written recommendations. - Fixing: Top fixed as per manufacturers written recommendations. 80 INSTALLATION GENERALLY - Fasteners and methods of fixing: To Section Z20. - Dissimilar materials: Isolate to avoid corrosion and/ or staining. - Structural members: Do not modify, cut, notch or make holes in structural members,

except as indicated on drawings. - Temporary support: Do not use stairs, walkways or balustrades as temporary support

or strutting for other work.

P35 TRENCHES/ PIPEWAYS/ PITS FOR BURIED ENGINEERING SERVICES 0010 ROUTES OF SERVICES BELOW GROUND - Locations of new service runs: Submit proposals. - Routes within 1m of rail tracks shall be made without excavation: Submit proposals. - Temporary marking: Indicate service runs with marker posts. 0020 TRENCHES - Width: As small as practicable. - Trench sides: Vertical. - Trench bottoms: Remove mud, rock projections, boulders and hard spots. Trim level. - Existing surfaces: preserve and set aside turfs for reinstatement. - Give notice: To inspect trench for each section of the work.



0030 PIPEDUCTS - Types and sizes: HD polyethylene twin wall to ESI12/24 and BS EN 50086 2-4.

- Manufacturer and reference: Polypipe Civils Ltd: - Reference:

- Road crossings: Rigicoil: 110mm. - Street lighting interconnects: Polyduct power 50mm.

- Colour: Orange. - General: - Provide ducts for all cables laid under hard surfaces. - Lay pipes straight to line, true to gradient or level on an even, continuous bed. - Burial depth: to give minimum 600mm cover.

- Bedding thickness: 100mm min. - Clearance between pipe ducts where they cross (minimum): 50 mm. - Drawlines: During laying, thread through pipe ducts.

- Material, strength and length: As specified by service undertaker. - Protection: Protect from ingress of debris. During construction, temporarily seal all

exposed ends. - Inspection: Before backfilling, allow service undertakers to inspect installation.

Surround material: Lay and compact to 150 mm (minimum) above pipe duct crown.

Q10 KERBS/ EDGINGS/ CHANNELS/ PAVING ACCESSORIES 10 PRECAST CONCRETE KERB TO CAR PARK - To BS EN 1340. - Manufacturer: Marshalls, Landscape House, Premier Way, Lowfields Business Park,

Elland, West Yorkshire HX5 9HT. Tel: 01422 312000. - Product reference: Charnwood Road kerb. - Designations: Half Battered - Size (width x height x length): 125mm x 255mm x 915mm. - Special shapes: Radius kerbs and dropper kerbs. - Finish: Textured. - Colour: French Grey. - Joints: As clause 50. 11 PRECAST CONCRETE EDGING TO CAR PARKING AREAS - To BS EN 1340. - Manufacturer: Hanson Formpave, Tufthorn Avenue, Coleford, Gloucestershire, GL16

8PR. Tel. 01594 836999. - Product reference: Forest edge. - Size (width x height x length): 100mm x 200mm x 500mm. - Special shapes: None. - Finish: Textured. - Colour: Natural. - Joints: As clause 50. 12 PRECAST CONCRETE EDGING TO FOOTPATHS - To BS EN 1340. - Manufacturer: Marshalls, Landscape House, Premier Way, Lowfields Business Park,

Elland, West Yorkshire HX5 9HT. Tel: 01422 312000. - Product reference: Flat top edging. - Size (width x height x length): 50mm x 150mm x 915mm. - Special shapes: None.



- Finish: Standard. - Colour: Grey. - Joints: As clause 50. 40 LAYING KERBS, EDGINGS AND CHANNELS - Cutting: Neat and accurate and without spalling. Form neat junctions. - Bedding and backing of units: Either of the following: Bedded on mortar laid on

hardened concrete base. Bedding mortar allowed to set and units secured with a continuous haunching of concrete.

- Bedded on fresh concrete races to BS 7533-6, secured with backing concrete cast monolithically with concrete race.

- Concrete for foundations and haunching: - Standard: To BS 8500-2. - Designated mix: Not less than GEN0 or Standard mix ST1 or better, low

workability. - Mortar bedding: 1:3 cement:sand as section Z21. - Bed thickness: 12-40 mm. 45 ACCURACY - Deviations (maximum): - Level: 6 mm. - Horizontal and vertical alignment: 3 mm in 3 m. 50 TOOLED MORTAR JOINTS - Jointing: Ends of units buttered with bedding mortar as laying proceeds. Joints

completely filled and tooled to a neat flush profile. - Joint width: 6 mm. 60 SEALANT MOVEMENT JOINTS - Joint filler: Compressible cellular rubber or plastics, built in as work proceeds,

extending through haunching and foundation and positioned to support correct depth of sealant.

- Joint width: 10 mm. - Sealant: Silicone. - Sealant application: As section Z22. 65 ROAD MARKING - Manufacturer: Kestrel Thermoplastics Ltd, 89 Drumagarner Road, Kilrea, Co. Derry,

Northern Ireland BT51 5TE Tel: 028 2954 0906 - Product reference: Duraskid thermoplastic line marking. - Colour: Reflective white. - Surface to receive markings: Clean and dry, loose material removed. - Application: Uniform, with no streaks or ragged edges.

Q20 GRANULAR SUB-BASES TO ROADS/ PAVINGS 10 THICKNESSES OF SUB-BASES - Thicknesses: As specified in the relevant paving section. 20 HERBICIDES - Application: To subgrade of footpaths.



30 EXCAVATION AND COMPACTION OF SUBGRADES - Final excavation to formation level: Carry out immediately before compaction of

subgrade. - Soft spots and voids: Give notice. - Old drainage and service trenches: Give notice. - Wet conditions: Do not excavate or compact when the subgrade may be damaged or

destabilized. - Compaction: Thoroughly, by roller or other suitable means, adequate to resist

subsidence or deformation of the subgrade during construction and of the completed roads/ pavings when in use. Take particular care to compact fully at intrusions, perimeters and where local excavation and backfilling has taken place.

40 SUB-BASES - Granular material: Of a known suitability for use in sub-bases, free from ice, harmful

matter and excessive dust or clay, well graded, all pieces less than 75 mm in any direction, and selected from one of the following:

- Crushed rock (other than argillaceous rock) or quarry waste. - Crushed concrete, crushed brick or tile, free from plaster, timber and metal. - Gravel or hoggin with not more clay content than is required to bind the material

together, and with no large lumps of clay. - Natural sand or gravel. 45 LAYING AND COMPACTING SUB-BASES - Subgrade: Not frozen and free from loose soil, rubbish and standing water. - Structures, membranes and buried services: Ensure stability and avoid damage. - General: Spread and level in layers. - Compaction: - Timing: As soon as possible after laying. - Method: By roller or other suitable means, adequate to resist subsidence or

deformation of the sub-base during construction and of the completed paving when in use. Take particular care to compact fully at intrusions, perimeters and where local excavation and backfilling has taken place.

50 ACCURACY - Permissible deviation from required levels, falls and cambers (maximum): - Subgrade: 20 mm. - Sub-base: 12 mm. 60 SURFACES TO RECEIVE SAND BEDDING FOR PAVING - Blind surface: As necessary before compaction to ensure that surface is tight and

dense enough to prevent laying course sand being lost into it during construction or use.

- Material: Sand or PFA. 70 PROTECTION - Sub-bases: As soon as practicable, cover with subsequent layers, specified

elsewhere. - Subgrades and sub-bases: Prevent degradation by construction traffic, construction

operations and inclement weather.

Q23 GRAVEL/ HOGGIN/ WOODCHIP ROADS/ PAVINGS 10 HARD BINDING GRAVEL BETWEEN KNEE RAIL AND NEW FOOTPATH



- Granular sub-base: As section Q20. - Compacted thickness: 150 mm. - Blinding to sub-base: - Type: Coarse sand. - Laying: Compact. Seal interstices. Provide free drainage. - Compacted thickness: 25 mm. - Surface course: Angular gravel free from clay, with sufficient grit to enable

compaction by roller. - Type: Pit gravel. - Size: Graded 8-14 mm. - Drainage falls (minimum): 1:30. - Compacted thickness: 100 mm. - Laying: Spread and level in 100 mm maximum layers. Thoroughly compact each

layer. - Dry weather: Lightly water layers during compaction. - Finished surfaces: - Lines and levels: To prevent ponding. - Overall texture: Even. - State at completion: Clean.

Q24 INTERLOCKING BRICK/ BLOCK ROADS/ PAVINGS 12 PERMEABLE CONCRETE BLOCK PAVING TO CAR PARKING SPACES - Geotextile below granular sub-base: Inbitex filter/separation layer geotextile

membrane over chalk. - Granular sub-base: 10-63mm stone lower sub-base. - Compacted thickness: To Zone 1, 2 & 3 is 350mm and to Zone 4 is 450mm. - Granular sub-base: 5-20mm clean stone upper sub-base on SC intergrid. - Compacted thickness: 100mm. - Geotextile below laying course: Inbitex filter/separation layer geotextile membrane. - Laying course: - Material: 2-6mm single size clean crushed stone. - Compaction: In accordance with BS 7533-3. - Nominal thickness after compaction: 50mm. - Blocks: To BS EN 1338. - Manufacturer: Hanson Formpave, Tufthorn Avenue, Coleford, Gloucestershire,

GL16 8PR. Tel. 01594 836999. Product reference: Aquaflow Permeable Block. - Sizes: 100mm x 200mm x 80mm. - Special blocks: As per manufacturers written recommendations. - Colour/ Finish: Charcoal colour, standard finish. - Jointing: - Material: 3mm single size clean stone. - Joint width: Determined by spacer nibs on blocks. - Setting out: - Bond: Herringbone. - Features: Burnt red coloured blocks to demarcate parking spaces & pedestrian

areas.



13 STANDARD CONCRETE BLOCK PAVING TO ROAD SURFACES - Geotextile below granular sub-base: Inbitex filter/separation layer geotextile

membrane over chalk. - Granular sub-base: 10-63mm stone lower sub-base. - Compacted thickness: To Zone 1, 2 & 3 is 350mm and to Zone 4 is 450mm. - Granular sub-base: 5-20mm clean stone upper sub-base on SC intergrid. - Compacted thickness: 100mm for all Zones. - Geotextile below laying course: Inbitex filter/separation layer geotextile membrane. - Laying course: - Material: 2-6mm single size clean crushed stone. - Compaction: In accordance with BS 7533-3. - Nominal thickness after compaction: 50mm. - Blocks: To BS EN 1338. - Manufacturer: Hanson Formpave, Tufthorn Avenue, Coleford, Gloucestershire,

GL16 8PR. Tel. 01594 836999. Product reference: Royal Foreset Standard Concrete Block. - Sizes: 100mm x 200mm x 80mm. - Special blocks: As per manufacturers written recommendations. - Colour/ Finish: Golden brindle, standard finish. - Jointing: - Material: 3mm single size clean stone. - Joint width: Determined by spacer nibs on blocks. - Setting out: - Bond: Herringbone. - Features: Burnt red coloured blocks to demarcate parking spaces & pedestrian

areas. 14 STANDARD CONCRETE BLOCK PAVING TO FOOTPATH - Manufacturer: Hanson Formpave, Tufthorn Avenue, Coleford, Gloucestershire,

GL16 8PR. Tel. 01594 836999. Product reference: Royal Foreset Standard Concrete Block. - Sizes: 100mm x 200mm x 60mm. - Special blocks: None. - Colour/ Finish: Golden brindle, standard finish. - Jointing: - Material: 3mm single size clean stone. - Joint width: Determined by spacer nibs on blocks. - Setting out: - Bond: Herringbone. - Features: 50x100mm p.c. concrete edging. 35 LAYING GENERALLY - Standard: In accordance with BS 7533-3. - Laying blocks/ pavers/ setts: Commence from an edge restraint. Vibrate to produce a

thoroughly interlocked paving of even overall appearance with regular stone filled joints and accurate to line, level and profile.

- Cutting blocks/ pavers: Neatly and accurately without spalling to give neat junctions at edge restraints and changes in bond.

- Colour banding: Select blocks/ pavers vertically from at least 3 separate packs in rotation to avoid colour banding.

38 LAYING PERMEABLE PAVING - General: In accordance with manufacturers instructions.



Q25 SLAB/ BRICK/ SETT/ COBBLE PAVINGS 11 LAYING PAVINGS - Cutting: Cleanly and accurately, without spalling, to give neat junctions with edgings

and adjoining finishes. - Lines and levels of finished surface: Smooth and even with falls to prevent ponding. - Bedding of units: Firm so that rocking or subsidence does not occur or develop. - Appearance: Even and regular with even joint widths and free of mortar and sand

stains. 16 LEVELS OF PAVING - Permissible deviation from specified levels (generally): 6 mm. - Height of finished paving above features: - At gullies: +6 to +10 mm. - At drainage channels and kerbs: +3 to +6 mm. 21 PROTECTION FROM TRAFFIC - Mortar bedded pavings: Keep free from pedestrian traffic for 4 days and vehicular

traffic for 10 days after laying. - Access: Restrict access to paved areas to prevent damage from site traffic and plant. 31 CONCRETE FLAG PAVING TO PATH & STAIR EDGING - Granular sub-base: As section Q20. - Thickness: 150mm. - Laying and jointing: Bound construction on mortar, site category IV, to BS 7533-4. - Laying course: Full mortar bed, nominal thickness after compaction: 15-25 mm. - Mortar: As section Z21, mix: 1:3 cement:sand. - Slabs: To BS EN 1339. - Manufacturer: Marshalls, Landscape House, Premier Way, Lowfields Business

Park, Elland, West Yorkshire HX5 9HT. Tel: 01422 312000. Product reference: Saxon. - Colour/ Finish: Buff. - Sizes: 300 x 300 x 60mm. - Jointing: Mortar filled. - Width: 5-10 mm. - Mortar: As section Z21, mix: 1:4 cement:sand. 32 CONCRETE FLAG PAVING TO STAIR LANDINGS - Granular sub-base: As section Q20. - Thickness: 150mm. - Laying and jointing: Bound construction on mortar, site category IV, to BS 7533-4. - Laying course: Full mortar bed, nominal thickness after compaction: 15-25 mm. - Mortar: As section Z21, mix: 1:3 cement:sand. - Slabs: To BS EN 1339. - Manufacturer: Marshalls, Landscape House, Premier Way, Lowfields Business

Park, Elland, West Yorkshire HX5 9HT. Tel: 01422 312000. Product reference: Corduroy hazard warning paving slab. - Colour/ Finish: Buff, standard finish. - Sizes: 400mm x 400mm x 50mm thick. - Jointing: Mortar filled. - Width: 5-10 mm. - Mortar: As section Z21, mix: 1:4 cement:sand.



32 CONCRETE FLAG PAVING TO ROAD CROSSINGS - Granular sub-base: As section Q20. - Thickness: 150mm. - Laying and jointing: Bound construction on mortar, site category IV, to BS 7533-4. - Laying course: Full mortar bed, nominal thickness after compaction: 15-25 mm. - Mortar: As section Z21, mix: 1:3 cement:sand. - Slabs: To BS EN 1339. - Manufacturer: Marshalls, Landscape House, Premier Way, Lowfields Business

Park, Elland, West Yorkshire HX5 9HT. Tel: 01422 312000. Product reference: Blister hazard warning paving slab. - Colour/ Finish: Buff, standard finish. - Sizes: 400mm x 400mm x 50mm thick. - Jointing: Mortar filled. - Width: 5-10 mm. - Mortar: As section Z21, mix: 1:4 cement:sand.

Q28 TOPSOIL AND GROWING MEDIA 10 PREPARATION OF UNDISTURBED TOPSOIL - General: Prepare as necessary for subsequent cultivation operations. - Hard ground: Break up thoroughly. - Ground covered with turf or a thick sward: Plough or dig over to full depth of topsoil. 20 IMPORTED TOPSOIL - Quantity: Provide as necessary to make up any deficiency existing on site and to

complete the work. - Classification: Multipurpose to BS 3882. 25 COMPOST - Standard: In accordance with PAS 100. - Type: Sanitized and stabilized compost. - Horticultural parameters: - pH (1:5 water extract): 7.0-8.7. - Electrical conductivity (maximum, 1:5 water extract): 200 mS/m. - Moisture content (m/m of fresh weight): 35-55%. - Organic matter (minimum): 25%. - Grading (air dried samples): 99% passing 25 mm screen, and 90% a 10 mm

screen mesh aperture. - Carbon:Nitrogen ratio (maximum): 20:1. - Texture: Friable. - Objectionable odour: None. - Timing: Apply prior to cultivation. 30 SPREADING TOPSOIL - Temporary roads or surfacing: Remove before spreading topsoil. - Spreading: Spread when reasonably dry, maintaining crumb structure. Do not

compact. - Layers: - Depth (maximum): 150 mm. - Gently firm each layer before spreading the next. - Depths after firming and settlement (minimum): 100 mm.



40 FINISHED LEVELS OF TOPSOIL AFTER SETTLEMENT - Above adjoining paving or kerbs: 30 mm. - Within the root spread of existing trees: Unchanged. - Below dpc of adjoining buildings: Not less than 150 mm. - Shrub areas: Higher than adjoining grass areas by 30 mm. - Within root spread of existing trees: Unchanged. - Adjoining soil areas. Marry in. 45 DOCUMENTATION - Timing: Submit at handover. - Contents: - Record of source for all soil components. - Record drawings showing the location and depth of all soils. - Supplier's declaration of compliance with BS 3882.

Q40 FENCING 10 WOODEN POST AND RAIL FENCING - Standard: To BS 1722-7. - Manufacturer: Jackson Fensing. Tel: 0800 4082234. Reference: Timber Knee Rail. - Joints: Nailed. - Height: 600 mm. - Wood: Homegrown hardwoods. - Treatment: All timber is pressure treated. - Maximum centres of posts: 1800 mm. - Post setting: Concrete. - Accessories: None. - Conformity: Submit manufacturers and installers certificates, to BS 1722-7. 60 INSTALLATION GENERALLY - Expertise: By an experienced fencing contractor. - Alignment: Straight lines or smoothly flowing curves. - Tops of posts: Following profile of the ground. - Setting posts: Rigid, plumb and to specified depth, or greater where necessary to

ensure adequate support. - Fixings: All components securely fixed. 70 SETTING POSTS IN CONCRETE - Standard: To BS 8500-2. - Mix: Designated concrete not less than GEN1 or Standard prescribed concrete not

less than ST2. - Alternative mix for small quantities: 50 kg Portland cement to 150 kg fine aggregate to

250 kg 20 mm nominal maximum size coarse aggregate, medium workability. - Admixtures: Do not use. - Holes: Excavate neatly and with vertical sides. - Filling: Unless specified otherwise position post/ strut and fill hole with concrete to not

less than half the depth, well rammed as filling proceeds and consolidated. - Backfilling of holes not completely filled with concrete: Excavated material, well

rammed and consolidated.



72 SETTING POSTS IN EARTH - Holes: Excavated neatly, with vertical sides and as small as practicable to allow

refilling. - Filling: Position posts/ struts and replace excavated material, well rammed as filling

proceeds. 75 DRIVEN POSTS - Damage to heads: Minimize. - Repair: Neatly finish post tops after installation. 80 WOOD RAILS - Length (minimum): Two bays, with joints in adjacent rails staggered. - Fixing: Nail each length of rail to each post with two 100 mm galvanized nails. - Rails with split ends: Replace. 85 SITE CUTTING OF WOOD - General: Kept to a minimum. - Below or near ground level: Cutting prohibited. - Treatment of surfaces exposed by minor cutting and drilling: Two flood coats of

solution recommended for the purpose by main treatment solution manufacturer. 90 MAKING GOOD GALVANIZED SURFACES - Treatment of minor damage (including on fasteners and fittings): Low melting point

zinc alloy repair rods or powders made for this purpose, or at least two coats of zinc-rich paint to BS 4652.

- Thickness: Apply sufficient material to provide a zinc coating at least equal in thickness to the original layer.

Q50 SITE/ STREET FURNITURE/ EQUIPMENT 30 STREET FURNITURE, SEAT - Manufacturer: Broxap Street Furniture, Rowhurst Industrial Estate, Chesterton,

Newcastle-under-Lyme, Staffordshire ST5 6BD. Tel: 01782 564411. - Product reference: BX45 2095-BP Johnson Lift Assist Seat. - Size: 2000mm long. - Accessories/ Special requirements: None. 34 TRAFFIC SIGNS - Manufacturer: Health & Safety Signs (Tel: 0208 133 6709), www.health-safety-

signs.uk.com. Signs: Aluminium with reflective material, red/white/blue with black lettering as

standard. Signs to be positioned as shown on the drawing and in accordance with: The Traffic Signs Regulations and General Directions 2002, amended 2005:

Sign Diagram Size Directions Lighting

Give Way 602 750 Solar LED No Entry 616 600 Solar LED No Left Turn 613 450 None Parking 2501 + arrow 500 x 375 Handing to suit None

- Plain post: - Posts: 76mm diameter anodised aluminium, colour: grey, with plastic cap.



- Height: Select height to give bottom of sign at 2100mm above ground level; provide additional height for mounting sign illumination and photovoltaic panels.

- Accessories/ Special requirements: Back channels and stainless steel straps for securing sign to post. Steel base plate for securing post once set in concrete.

- Method of fixing: Set into concrete foundation as recommended by the manufacturer. 36 TRAFFIC BOLLARD - Manufacturer: Traffic Management Products Ltd www.traffic-products.co.uk Reference: Heritage Solalite - Provide concrete base. - Bollards require DfT authorisation for use in accordance with: The Traffic Signs

Regulations and General Directions 2002, amended 2005: provide information to the PM so that approval may be sought.

37 LAMP POST PROTECTION - Manufacturer: Broxap Street Furniture, Rowhurst Industrial Estate, Chesterton,

Newcastle-under-Lyme, Staffordshire ST5 6BD. Tel: 01782 564411. Reference: BX14 6539R Lamp Post Protector, height 1000mm. - Provide concrete base. - Fixing: As per manufacturers written recommendations. 80 CONCRETE FOUNDATIONS - Standard: To BS 8500-2. - Mix: Designated concrete not less than GEN 1 or standard prescribed concrete not

less than ST2. - Foundation holes: Neat vertical sides. - Depth of foundations, bedding, haunching: Appropriate to provide adequate support

and to receive overlying soft landscape or paving finishes. - Components: Accurately positioned and securely supported. - Concrete fill: Fully compacted as filling proceeds. - Concrete foundations exposed to view: Compacted until air bubbles cease to appear

on the upper surface, then weathered to shed water and trowelled smooth. - Temporary component support: Maintain undisturbed for minimum 48 hours.

R12 BELOW GROUND DRAINAGE SYSTEMS To be read with Preliminaries/ General conditions.

GENERAL 110 BELOW GROUND DRAINAGE SYSTEM - Surface water drainage sources. - Pipes, bends and junctions: Plastic. - Silt pits: Precast concrete. - Accessories: Gully, grating and frames. - Disposal: Ground percolation through new base and sub base construction of car

park.



SYSTEM PERFORMANCE 221 DESIGN Formpave Aquaflow System - Design: Complete the design of the system. - Ground conditions: Details can be obtained from site investigation reports. - Required percolation rate: See above. - Design life of system: 50 years. - Proposals: Submit drawings, technical information, calculations and manufacturers

literature. - Maintenance requirements: Submit details.

PRODUCTS 313 ROAD GULLY - Standards: To BS EN 1253-1, -2, -3, -4 and -5; or - Cast iron: To BS 437 and Kitemark certified, or Agrment certified. - Clay: To BS EN 295-1 and Kitemark certified, or Agrment certified. - Concrete: To BS 5911-6 and Kitemark certified, or Agrment certified. - Plastics: To BS 4660 and Kitemark certified, or Agrment certified. - Polypropylene: To BS EN 1852-1. - Material: Clay. - Manufacturer: Hepworth. - Product reference: RGR1. - Sizes: 300mm. - Outlet sizes: 100mm. 346 PIPES, BENDS AND JUNCTIONS - PVC-U - SOLID WALL - Standard: To BS EN 1401-1, with flexible joints. - Class: SN4. - Manufacturer: Marley. - Product reference: Solid wall. - Sizes: 110mm. - Application area code: UD. 407 CONCRETE SILT PIT - Standards: - To BS 5911-3 and BS EN 1917 and Kitemark certified; or - To BS 5911-4 and BS EN 1917. - Manufacturer: Milton. - Shape: Circular ring. - Sizes: 900mm. - Product reference: Plain. - Jointing type: As recommended by the manufacturer. - Cover slabs: - Product reference: 600 x 600mm central. - Thickness: 125mm. - Loading grades to BS EN 124: C250. - Openings: To suit access covers. - Steps: None. 446 SEALING FOR CONCRETE MANHOLES - MORTAR - Manufacturer: As recommended by the manufacturer. - Product reference: As recommended by the manufacturer.



471 ROAD GULLY GRATING - Standard: To BS EN 124. - Types: Waterway 2000. - Manufacturer: Saint-Gobain. - Product reference: H9725. - Materials: Ductile iron. - Sizes: 600 x 600mm clear opening. - Loading grades to BS EN 124: D400. 471 SILT PIT ACCESS COVERS AND FRAMES - Standard: To BS EN 124. - Types: Manhole cover. - Manufacturer: Saint-Gobain. - Product reference: Valiant C5145. - Materials: Ductile iron. - Sizes: 600 x 600mm clear opening. - Loading grades to BS EN 124: C250. 483 CONCRETE (GENERAL) - Standard: To BS 8500-2. - Concrete: ST4. 492 GEOTEXTILE MEMBRANES - FILTER - Manufacturer: As recommended by the Formpave Aquaflow System design. - Product reference: As recommended by the Formpave Aquaflow System design. 496 GRANULAR MATERIAL - All as recommended by the Formpave Aquaflow System design.

EXECUTION 610 STRIPPING OUT - Extent of stripping out: To suit depth of Formpave Aquaflow System design. - Exposed ends of existing drainage to be abandoned: Seal with concrete (general). 611 EXISTING DRAINS - Setting out: Before starting work, check invert levels and positions of existing drains,

sewers, inspection chambers and manholes against drawings. Report discrepancies. - Protection: Protect existing drains to be retained and maintain normal operation if in

use. 613 EXCAVATED MATERIAL - Turf, topsoil, hardcore, etc: Set aside for use in reinstatement. 616 SELECTED FILL FOR BACKFILLING - Selected fill: As-dug material, free from vegetable matter, rubbish, frozen soil and

material retained on a 40 mm sieve. - Compaction: By hand in 100 mm layers.



623 LOWER PART OF TRENCH - GENERAL - Trench up to 300 mm above crown of pipe: Vertical sides, width as small as

practicable. - Width (minimum): External diameter of pipe plus 300 mm. 631 TYPE OF SUBSOIL - General: Where type of subsoil at level of crown of pipe differs from that stated for the

type of bedding, surround or support, give notice. 635 FORMATION FOR BEDDINGS - Timing: Excavate to formation immediately before laying beddings or pipes. - Mud, rock projections, boulders and hard spots: Remove. Replace with consolidated

bedding material. - Local soft spots: Harden by tamping in bedding material. - Inspection of excavated formations: Give notice. 661 CLASS O SUPPORT TO PIPES - Granular material: Submit proposals. - Pipe sizes DN 100 and DN 150: Size 4/10. - Bedding: - Material: Granular, compacted over full width of trench. - Thickness (minimum): 100 mm. - Pipes: Dig slightly into bedding, rest uniformly on barrels and adjust to line and

gradient. - Initial testing before placing support: Required. - Support: - Material: Granular. - Depth: To slightly above crown of pipe. - Compaction: By hand. - Backfilling: Material and depth: Protective cushion of selected fill to 300 mm above crown of

pipe; or Additional granular material, to 100 mm above crown of pipe. - Compaction: By hand in 100 mm layers. 663 CLASS P SUPPORT TO PIPES - Granular material: Submit proposals. - Pipe sizes DN 100 and DN 150: Size 4/10. - Bedding: - Material: Granular, compacted over full width of trench. - Thickness (minimum): 100 mm. - Pipes: Dig slightly into bedding, rest uniformly on barrels and adjust to line and

gradient. - Initial testing before placing support: Required. - Support: - Material: Granular. - Depth: To slightly above crown of pipe. - Compaction: By hand. - Backfilling: - Material and depth: Protective cushion of selected fill to 300 mm above crown of pipe; or Additional granular material, to 100 mm above crown of pipe. - Compaction: By hand in 100 mm layers.



678 CLASS Z SURROUND - Blinding: - Material: Concrete (general). - Thickness (minimum): 25 mm. - Width: Full width of trench. - Allow to set before proceeding. - Pipes: - Temporary support: Folding wedges of compressible board. Prevent flotation. - Clearance under pipes (minimum): 100 mm. - Adjust pipes to line and gradient. - Initial testing before placing surround: Required. - Surround: - Material: Concrete. - Depth: To 150 mm above crown of pipe. - Width: Full width of trench. - Vertical construction joints: - Location: At face of flexible pipe joints. - Material: 18 mm thick compressible board precut to profile of pipe. - Socketed pipes: Fill gaps between spigots and sockets with resilient material to

prevent entry of concrete. 683 LAYING PIPELINES - Laying pipes: To true line and regular gradient on even bed for full length of barrel

with sockets (if any) facing up the gradient. - Ingress of debris: Seal exposed ends during construction. - Timing: Minimize time between laying and testing. 685 JOINTING PIPELINES - Connections: Durable, effective and free from leakage. - Junctions, including to differing pipework systems: With adaptors intended for the

purpose. - Cut ends of pipes: Clean and square. Remove burrs and swarf. Chamfer pipe ends

before inserting into ring seal sockets. - Jointing or mating surfaces: Clean and, where necessary, lubricate immediately

before assembly. - Allowance for movement: Provide and maintain appropriate clearance at ends of

spigots as fixing and jointing proceeds. - Jointing material: Do not allow to project into bore of pipes and fittings. 689 PIPELINES PASSING THROUGH STRUCTURES - Pipelines that must be cast in or fixed to structures (including manholes, catchpits

and inspection chambers): Provide 600 mm long rocker pipes adjacent to the external face of the structure (or both faces where appropriate, e.g. walls to footings), with flexible joints at both ends.

- Distance to rocker pipe from structure (maximum): 150 mm. - Provision for movement for pipelines that need not be cast in or fixed to structures

(e.g. walls to footings): - Rocker pipes as specified above; or - Openings in the structures to give 50 mm minimum clearance around the pipeline.

Closely fit a rigid sheet to each side of opening to prevent ingress of fill or vermin.



705 INITIAL TESTING OF PIPELINES - Before testing: - Cement mortar jointing: Leave 24 h. - Solvent welded pipelines: Leave 1 h. - Method: Block open ends of pipelines to be tested and pressurise. Air test short

lengths to BS EN 1610. 715 BACKFILLING TO PIPELINES - Backfilling above top of surround or protective cushion: Material excavated from

trench, compacted in layers 300 mm (maximum) thick. - Heavy compactors: Do not use before there is 600 mm (total) of material over pipes. 720 BACKFILLING UNDER ROADS AND PAVINGS - Backfilling from top of surround or protective cushion up to formation level: Granular

sub-base material, laid and compacted in 150 mm layers. 728 LAYING WARNING MARKER TAPES - Installation: During backfilling, lay continuously over pipelines. - Depth: 300-400 mm. - Pipelines deeper than 2 m: Lay an additional tape 600 mm above the top of the

pipeline. 743 INSTALLING CONCRETE SILT PITS - Bases: - Material: ST4 Concrete. - Thickness (minimum): 225mm. - Surround: - Material: ST2 Concrete. - Thickness (minimum): 150mm. - Height: Full height. - Backfilling: - Material: Granular material , size 4/10. - Compaction: By hand in 100 mm layers. 755 JOINTING CONCRETE MANHOLE CHAMBER SECTIONS - Jointing and sealing: Mortar. - Inner joint surface: Trim surplus jointing material extruded into chamber and point

neatly. 776 EXPOSED OPENINGS IN INSPECTION CHAMBERS, ACCESS POINTS, FITTINGS

AND EQUIPMENT - General: Fit purpose made temporary caps. Protect from site traffic.

COMPLETION 901 REMOVAL OF DEBRIS AND CLEANING - Preparation: Lift covers to manholes, inspection chambers and access points.

Remove mortar droppings, debris and loose wrappings. - Timing: Before cleaning, final testing, CCTV inspection if specified, and

immediately before handover. - Cleaning: Thoroughly flush pipelines with water to remove silt and check for

blockages. Rod pipelines between access points if there is any indication that they may be obstructed.



- Washings and detritus: Do not discharge into sewers or watercourses. - Covers: Securely replace after cleaning and testing. 903 TEMPORARY MEASURES - Water used to stabilize tanks and the like during installation: Drain. 911 TESTING AND INSPECTION - Dates for testing and inspection: Give notice. 921 FINAL TESTING OF PRIVATE GRAVITY DRAINS AND SEWERS UP TO DN 300 - Before testing: - Cement mortar jointing: Leave 24 h. - Solvent welded pipelines: Leave 1 h. - Standard: To Building Regulations. - Method: Contractors choice. 941 WATER TESTING OF MANHOLES AND INSPECTION CHAMBERS - Timing: Before backfilling. - Standard: - Exfiltration: To BS EN 1610. Method: Testing with water (method W). - Infiltration: No identifiable flow of water penetrating the chamber.

V95 ELECTRICAL SYSTEMS GENERAL 0010 OTHER SPECIFICATIONS

- The contractor shall comply with the requirements of current Defence Estates Organisation (DEO) standard documents and specifications as amplified on the drawings and within this specification. The DEO specification applicable to these works are:

- Specification 034 Electrical installations (formerly M&E No.1). - Except as described below Specification 034 shall be read as required and exclude

any alternative options offered. 0020 OTHER CONSTRUCTION AND INSTALLATION RULES

- All work undertaken in this site is subject to Defence Estates Organisation (DEO) Safety Rules and Procedures JSP 375. The procedures applicable to these works are:

- Volume 3 Chapter 3 Electricity - Comply with the manufacturers written recommendations for the installation of

equipment and use of materials. - Services shown are indicative only. The contractor should ascertain the identity and

extent of all services and obstructions and allow for all diversions and temporary arrangements prior to installation.

- Functional Switching: Fit all functional devices within reach when standing on the normal floor and at no more than 2m above the floor level.

- The identification of circuits and distribution boards indicated on the drawings is for tender purposes only. Reconcile drawing identification marking with existing distribution board marking and re-sequence the identification to fit with the existing



system. Submit the proposed sequential marking system for approval of the PM before application.

0030 DISMANTLING & DISPOSAL

- As required to effect the changes described in the drawings: dismantle and remove existing wiring systems and components. Provide all temporary disconnections and wiring to facilitate building operations and restore services on completion.

- The contractor shall take on all the responsibilities and take all the measures required as a Producer under the EC Directives; Waste Electrical and Electronic Equipment (WEEE) and Restriction of Use of Certain Hazardous Substances (ROHS), and any like enactment under UK legislation, for all waste materials arising during the construction or demolition included in these works.

- Dispose dismantled and unused materials to approved recycling facilities and obtain disposal certificate for submission to the PM.

SYSTEM PERFORMANCE 1000 DESIGN DETAILING

- Standards: To BS 7671 and the requirements of the electricity distributor. - Complete the detailing of the electrical system, supports and brackets based on the

information provided on the drawings. Submit proposals. - Design information: Submit calculations, manufacturer's literature and drawings

showing equipment positions and routes. - Installation: Provide a safe, well insulated, earth protected system capable of serving

the building. 1010 DESIGN ASSUMPTIONS

- Source of supply: located at building intake. - Electrical supply conditions: 400/230V 50Hz 4 wire TN-S - Supply conditions: PSCC 1.05kA, EFR: 0.23 reported from periodic test. - Obtain instructions from the PM.

1200 THE INSTALLATION:

- Power distribution: Separately controlled circuits with further subdivision where necessary to ensure compliance with BS 7671:2008 (Requirements for Electrical Installations).

- Where due to alteration two different colour code standards exist within the building provide a permanent colour printed notice affixed to the origin of the circuit to denote this fact (see DE Policy Instruction 32/2004).

- Car park lighting to BS 5489-1, average illuminance 10 lux - Illuminated signage including solar powered lighting. - Amenity lighting to access path, average illuminance: 5 lux.

1230 CONTROLS

- Access path: provide for overall control of the lighting power circuit by a photocell and PIR operated contactor.

- Car park: collective control system with motion detectors in each luminaire to operate all luminaires simultaneously: the control system is to be active only during hours of darkness and is to bring the lighting up to full brightness instantaneously upon presence detection and to dim to zero over an adjustable predetermined period with no presence detected.



1260 WORK TO EXISTING SYSTEMS: - Remove parts of the installation and revise circuit supply connections as indicated.

Provide circuit identification labels to all new devices and of circuits reconnected. Examine and validate the identity of circuits to be revised. Report any discrepancies to the PM for action as instructed.

- Remove existing post mounted luminaires. PRODUCTS 2000 PRODUCTS GENERALLY

- Standard: To BS 7671. - CE Marking: Required. - Proposals: Submit drawings, technical information and manufacturer's literature.

2005 CABLES AND WIRING SYSTEMS

- Standard: Cable BASEC certified. - Systems: Select wiring and support systems to have zero potential for halogen

release in fire: - Multicore power cables: - Indoor: BS 7211. - External and underground: BS 6724.

- WIRING SUPPORTS: continuous support by fixing to building surfaces using conduit

or trunking and in concealed voids, steel cable tray or steel trunking. Loose laying or direct fixing of wiring is not permitted.

2060 STEEL CABLE TRAY SYSTEM

- Application: exposed. - Steel: heavy duty return edge, complete with all necessary fully welded junctions,

fixings, etc and return edge lid. - Finish: Grade galvanized. - Accessories: fittings in compatible material with equivalent chemical performance. - Minimise number of joints. Use manufacturers bends tees and/or junction boxes at

changes of direction. Fix using spacer bars. Fix boxes independently of trunking. - Provide lids to provide a rodent proof enclosure. - Do not use tray as a protective conductor.

2100 CONSUMER CONTROL UNITS/ DISTRIBUTION BOARDS

- Standards: To BS EN 60439-3 and ASTA certified. - Manufacturer: Eaton MEM - Reference: Memshield 3 - Main control: MCB. - Rating: As indicated. - Number of ways: As indicated allow space for contactor and RCBO. - Labelling: Each way to be permanently labelled to identify circuit and rating. - Circuit protection: Miniature circuit breakers to BS EN 60898.

2400 EXTERNAL LIGHTING LUMINAIRES:

- Lighting bollards: - Type: 900mm height LED bollard with spike mount for burial and access door. - Manufacturer: Abacus - Product reference: - Type A: Quartz Bollard LED: AL9003.



- Type B: Quartz Bollard LED: AL9001. - Street lamp lanterns: - Manufacturer and reference: Thorlux Folio 38W LED - Smart external control - Centre hinged 6m column as V95.2400. - Lighting control: - Folio: unitary smart external control preset timed dim and off operation to individual

program depending upon luminaire location. Submit proposals. - Manufacturer and reference: Thorlux Smart External Micro-pod sensor, provide one

Smart External Programmer. - Pathway lighting: switched by photocell detector circuit controlling the power supply. - Manufacturer and reference: Thorlux Smart External Controller, Smart Booster

operating from a Master Motion Line. - Type: Solar powered road sign illuminator. - Manufacturer Solagen Ltd - Solarsign - Type B double sided signs. - Lighting control: self powered.

- Lamp(s): to be supplied

2400 LIGHTING COLUMNS:

- Manufacturer: Stainton Metal Company Ltd - Type: Flanged base centre hinged aluminium street lighting column, 6m height with. - Single arm: Reference: ALCMH675-0.5_HS - Twin arm: Reference: ALCMH675-0.5_CHS - Provide concrete base to manufacturers dimensions and specification complete with

access for cable duct fixed post casting and flange fixings. - Fixings: stainless steel. - Location: as indicated, adjust indicated column locations to complete coverage.

2400 STREET LIGHTING SUPPLY CUT OUT:

- Type: Fused cut out for loop in wiring to fit in column base. - Manufacturer: Lucy Lighting - Reference: Titan2 single phase double pole for loop wiring: Type T06

2500 EARTHING - To BS 7430 and BS 7671: - Main and supplementary earth bar: copper, colour coded with bolted terminals to

crimped lug cable connections. - Main equipotential bonding: copper, minimum size 16mm. - Supplementary bonding conductors: copper, minimum size 4mm.

2510 ELECTRICITY METERS

- To BS EN 60687, IEC 61036 and CE marking standards. - Three phase and single phase CT operated integrating with digital kWh output LCD

dial and volt free pulsed output for connection to an energy monitoring system.



EXECUTION 3000 GENERAL EXECUTION

- Standards: To BS 7671. - Liaise with the Electricity Supply Authority as necessary to ensure suitability of supply

and earthing arrangement, and to ensure connection when required. - Installation work to be carried out by qualified electricians fully conversant with the

IEE Wiring Regulations. - Accessories necessary to complete the installation to be types recommended for the

purpose by relevant equipment manufacturer. - Fasteners: Avoid contact between dissimilar metals. Use corrosion resisting

fastenings in locations where moisture may occur. - In locations where excessive heat is present or may occur, use appropriate derating

factors for equipment. - Comply with restrictions on the cutting of holes, chases, notches, etc. specified in

section P31. - Fire Stopping: - Fill all penetrations through walls to maintain the fire integrity of the wall and the

appearance of the finished wall, provide sleeves as required. The filling medium is to be robust, capable of removal and re-application for future wiring works.

3030 INSTALLING CABLES GENERALLY - Standard: BASEC certified. - Orientation: Straight, vertical and/ or horizontal and parallel to walls. - Cable routes: Conceal cables wherever possible: - Concealed cable runs to wall switches and outlets: Vertically in line with the

accessory. - Exposed cable runs: Submit proposals. - Distance from other services running parallel: 150 mm minimum. - Position cables below heating pipes. - Cables passing through masonry walls: Sleeve with conduit bushed at both ends. - Cables surrounded or covered by insulation: Derate.

3050 CABLE ROUTES

- Cables generally: Conceal wherever possible. - Concealed cable runs to wall switches and outlets: Align vertically with the

accessory. - Exposed cable runs: Submit proposals.

- Orientation: Straight, vertical and/ or horizontal and parallel to walls. - Distance from other services running parallel: 150 mm minimum.

- Heating pipes: Position cables below. 3060 CABLES ENTERING BUILDINGS FROM BELOW GROUND

- General: Seal both ends of pipe duct to a minimum depth of 150 mm, with an approved non-hardening, non-cracking, water resistant compound. Alternatively, fit a proprietary moulded pipe duct seal.

3090 FINAL CONNECTIONS

- Size: Determine. - Cable: Heat resisting white flex. - Length: Allow for equipment removal and maintenance.



3100 INSTALLING LUMINAIRES - Comply with Specification 034. - Supports: Locate columns with hinge set to fall along the length of the car park clear

of overhead line. - Locations: Submit proposals. - Fix luminaires to post top using fully tightened set screws and set to correct angle.

3110 LABELLING

- Identification and notices: - Standards: To BS 5499-5 and BS 5378-2. - Equipment: Label when a voltage exceeding 230V is present.

- Distribution boards and consumer units: Card circuit chart within a reusable clear plastic cover. Fit to the inside of each unit. Include typed information identifying the outgoing circuit references, their device rating, cable type, size, circuit location and details. Label each outgoing way corresponding to the circuit chart.

- Wiring: Fit proprietary cable marker sleeves within distribution boards and consumer units to identify each wire of each circuit.

- Sub-main cables: Label at both ends, with proprietary cable marker sleeves. 3200 ENGRAVING

- Metal and plastic accessories: Engrave, indicating their purpose. - Emergency lighting test key switches: Describe their function. - Multigang light switches: Describe the luminaire arrangement.

3210 FINAL FIX

- Accessory faceplates, luminaires and other equipment: Fit after completion of building painting.

3220 DISTRIBUTION BOARDS

- Each way to be permanently labelled to identify circuit and rating. COMPLETION 4000 COMMISSIONING AND TESTING 4010 CLEANING

- Electrical equipment: Clean immediately before handover. - Equipment not supplied but installed under the electrical works: Clean immediately

before handover. 4200 GENERAL INSPECTION AND TESTING

- Standard: To BS 7671. - Notice before commencing tests (minimum): 24 hours. - Labels and signs: Fix securely before system is tested. - Inspection and completion certificates: Submit.

- Number of copies: 4. - Inspection and completion certificates: Submit the original and one copy to the PM

prior to physical completion of the works. 4300 OPERATION AND MAINTENANCE

- As Specification 034.



4310 AS BUILT DRAWINGS - As Specification 034. - Drawings shall include the results of illumination tests for approval by the PM.

Z10 PURPOSE MADE JOINERY 10 FABRICATION - Standard: To BS 1186-2. - Sections: Accurate in profile and length, and free from twist and bowing. Formed out

of solid unless shown otherwise. - Machined surfaces: Smooth and free from tearing, wooliness, chip bruising and

other machining defects. - Joints: Tight and close fitting. - Assembled components: Rigid. Free from distortion. - Screws: Provide pilot holes. Heads of countersunk screws sunk at least 2 mm below

surfaces visible in completed work. - Adhesives: Compatible with wood preservatives applied and end uses of timber. 20 CROSS SECTION DIMENSIONS OF TIMBER - General: Dimensions on drawings are finished sizes. - Maximum permitted deviations from finished sizes: - Softwood sections: To BS EN 1313-1. - Hardwood sections: To BS EN 1313-2. 30 PRESERVATIVE TREATED WOOD - Cutting and machining: Completed as far as possible before treatment. - Extensively processed timber: Retreat timber sawn lengthways, thicknessed, planed,

ploughed, etc. - Surfaces exposed by minor cutting and/ or drilling: Treat as recommended by main

treatment solution manufacturer. 40 MOISTURE CONTENT - Wood and wood based products: Maintained within range specified for the

component during manufacture and storage. 50 FINISHING - Surfaces: Smooth, even and suitable to receive finishes. - Arrises: Eased unless shown otherwise on drawings. - End grain in external components: Sealed with primer or sealer as section M60 and

allowed to dry before assembly.

Z11 PURPOSE MADE METALWORK 31 METAL PRODUCTS - Grades of metals, section dimensions and properties: To the appropriate British

Standards and suitable for the purpose. - Fasteners: Generally, same metal as component, with matching coating and finish. FABRICATION 50 PREPARATION FOR APPLICATION OF COATINGS



- General: Complete fabrication, and drill fixing holes before applying coatings. - Paint, grease, flux, rust, burrs and sharp arrises: Remove. 51 FABRICATION GENERALLY - Contact between dissimilar metals in components: Avoid. - Finished components: Rigid and free from distortion, cracks, burrs and sharp arrises. - Moving parts: Free moving without binding. - Corner junctions of identical sections: Mitre. - Prefinished metals: Do not damage or alter appearance of finish. 52 COLD FORMED WORK - Profiles: Accurate, with straight arrises. 53 WELDING AND BRAZING GENERALLY - Surfaces to be joined: Clean thoroughly. - Tack welds: Use only for temporary attachment. - Joints: Fully bond parent and filler metal throughout with no inclusions, holes, porosity

or cracks. - Surfaces of materials that will be self-finished and visible in completed work: Protect

from weld spatter. - Flux residue, slag and weld spatter: Remove. 54 WELDING OF STEEL - Method: Metal arc welding to BS EN 1011-1 and -2. 56 FINISHING WELDED AND BRAZED JOINTS VISIBLE IN COMPLETE WORK - Butt joints: Smooth, and flush with adjacent surfaces. - Fillet joints: Neat. - Grinding: Grind smooth where indicated on drawings. 58 GALVANIZING - Standard: To BS EN ISO 1461. - Vent and drain holes: - Sealing after galvanizing: Required. Submit proposals.

Z12 PRESERVATIVE/ FIRE RETARDANT TREATMENT 10 TREATMENT APPLICATION - Timing: After cutting and machining timber, and before assembling components. - Processor: Licensed by manufacturer of specified treatment solution. - Certification: For each batch of timber provide a certificate of assurance that

treatment has been carried out as specified. 20 COMMODITY SPECIFICATIONS - Standard: Current edition of the Wood Protection Association (WPA) publication

'Industrial wood preservation specification and practice'. 25 PRESERVATIVE TREATMENT SOLUTION STRENGTHS/ TREATMENT CYCLES - General: Select to achieve specified service life and to suit treatability of specified

wood species. 70 MAKING GOOD TO PROTECTION TREATMENT ON SITE



- Fire retardant/ preservative solution: Compatible with off-site treatment. - Application: In accordance with preservative manufacturers recommendations.

Z20 FIXINGS AND ADHESIVES 10 FIXINGS AND FASTENERS GENERALLY - Integrity of supported components: Select types, sizes, quantities and spacings of

fixings, fasteners and packings to retain supported components without distortion or loss of support.

- Components, substrates, fixings and fasteners of dissimilar metals: Isolate with washers or sleeves to avoid bimetallic corrosion.

- General usage: To recommendations of fastener manufacturers and/ or manufacturers of components, products or materials fixed and fixed to.

- Fixings: To be in straight lines, at regular centres. 25 FASTENER DURABILITY - Materials: To have: - Bimetallic corrosion resistance appropriate to items being fixed. - Atmospheric corrosion resistance appropriate to fixing location. - Appearance: Submit samples on request. 30 FIXINGS THROUGH FINISHES - Penetration of fasteners and plugs into substrate: To achieve a secure fixing. 35 PACKINGS - Materials: Noncompressible, corrosion proof. - Area of packings: Sufficient to transfer loads. 40 CRAMP FIXINGS - Fasteners: Fix cramps to frames with screws of same material as cramps. - Fixings in masonry work: Fully bed in mortar. 50 PELLETED COUNTERSUNK SCREW FIXINGS - Finished level of countersunk screw heads: Minimum 6 mm below timber surface. - Pellets: Cut from matching timber, grain matched, glued in to full depth of hole. - Finished level of pellets: Flush with surface. 55 PLUGGED COUNTERSUNK SCREW FIXING - Finished level of countersunk screw heads: Minimum 6 mm below timber surface. - Plugs: Glue in to full depth of hole. - Finished level of plugs: Projecting above surface. 60 APPLYING ADHESIVES - Surfaces: Clean. Regularity and texture to suit bonding and gap filling characteristics

of adhesive. - Support and clamping during setting: Provide as necessary. Do not mark surfaces of

or distort components being fixed. - Finished adhesive joints: Fully bonded. Free of surplus adhesive.



Z21 MORTARS 10 MORTAR MIXES - Specification: Proportions and additional requirements for mortar materials are

specified elsewhere. 20 SAND FOR SITE MADE CEMENT GAUGED MASONRY MORTARS - Standard: To BS EN 13139. - Grading: 0/2 (FP or MP). - Fines content where the proportion of sand is specified as a range (e.g. 1:1: 5-6): Lower proportion of sand: Use category 3 fines. Higher proportion of sand: Use category 2 fines. - Sand for facework mortar: Maintain consistent colour and texture. Obtain from one

source. 25 SAND FOR LIME:SAND MASONRY MORTARS - Type: Sharp, well graded. - Quality, sampling and testing: To BS EN 13139. - Grading/ Source: As specified elsewhere. 30 READY-MIXED LIME:SAND FOR CEMENT GAUGED MASONRY MORTARS - Standard: To BS EN 998-2. - Lime: Nonhydraulic to BS EN 459-1. - Type: CL 90S. - Pigments for coloured mortars: To BS EN 12878. 40 CEMENTS FOR MORTARS - Cement: To BS EN 197-1 and CE marked. - Types: Portland cement, CEM I. Portland limestone cement, CEM II/A-LL. Portland slag cement, CEM II/B-S. Portland fly ash cement, CEM II/B-V. - Strength class: 32.5, 42.5 or 52.5. - White cement: To BS EN 197-1 and CE marked. - Type: Portland cement, CEM I. - Strength class: 52.5. - Sulphate resisting Portland cement: - Types: To BS 4027 and Kitemarked. To BS EN 197-1 fly ash cement, CEM II/B-V and CE marked. - Strength class: 32.5, 42.5 or 52.5. - Masonry cement: To BS EN 413-1 and CE marked. - Class: MC 12.5. 50 ADMIXTURES FOR SITE MADE MORTARS - Air entraining (plasticizing) admixtures: To BS EN 934-3 and compatible with other

mortar constituents. - Other admixtures: Submit proposals. - Prohibited admixtures: Calcium chloride, ethylene glycol and any admixture

containing calcium chloride.



60 MAKING MORTARS GENERALLY - Batching: By volume. Use clean and accurate gauge boxes or buckets. - Mix proportions: Based on dry sand. Allow for bulking of damp sand. - Mixing: Mix materials thoroughly to uniform consistency, free from lumps. - Mortars containing air entraining admixtures: Mix mechanically. Do not overmix. - Contamination: Prevent intermixing with other materials. 70 MAKING HYDRAULIC LIME:SAND MORTARS - Mixing hydrated hydraulic lime:sand: Follow the lime manufacturers

recommendations for each stage of the mix. - Water quantity: Only sufficient to produce a workable mix.

Z22 SEALANTS PRODUCTS 31 JOINTS - Primer, backing strip, bond breaker: Types recommended by sealant manufacturer. EXECUTION 61 SUITABILITY OF JOINTS - Presealing checks: - Joint dimensions: Within limits specified for the sealant. - Substrate quality: Surfaces regular, undamaged and stable. - Joints not fit to receive sealant: Submit proposals for rectification. 62 PREPARING JOINTS - Surfaces to which sealant must adhere: - Remove temporary coatings, tapes, loosely adhering material, dust, oil, grease,

surface water and contaminants that may affect bond. - Clean using materials and methods recommended by sealant manufacturer. - Vulnerable surfaces adjacent to joints: Mask to prevent staining or smearing with

primer or sealant. - Backing strip and/ or bond breaker installation: Insert into joint to correct depth,

without stretching or twisting, leaving no gaps. - Protection: Keep joints clean and protect from damage until sealant is applied. 63 APPLYING SEALANTS - Substrate: Dry (unless recommended otherwise) and unaffected by frost, ice or snow. - Environmental conditions: Do not dry or raise temperature of joints by heating. - Sealant application: Fill joints completely and neatly, ensuring firm adhesion to

substrates. - Sealant profiles: - Butt and lap joints: Slightly concave. - Fillet joints: Flat or slightly convex. - Protection: Protect finished joints from contamination or damage until sealant has

cured.

nbs example3

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