technical note - tn 082: 2016 - transport for nsw...this document is one of a set of standards...

Technical Note - TN 082: 2016

© State of NSW through Transport for NSW of 1

For queries regarding this document

[email protected] www.asa.transport.nsw.gov.au

Technical Note - TN 082: 2016 Issued date: 21 December 2016

Subject: Revised reference to risk criteria This technical note has been issued by the Asset Standards Authority (ASA) to notify the

following.

• The risk criteria to be used by the Authorised Engineering Organisations (AEOs) providing

engineering services to TfNSW are contained in T MU MD 20002 ST Risk Criteria for

Organisations Providing Engineering Services, version 1.0.

• 30-ST-164 TfNSW Enterprise Risk Management (TERM) Standard provides the risk criteria

to be used by TfNSW.

• All references to the TERM standard in this document, where applicable to AEOs, shall read

as T MU MD 20002 ST.

Authorisation:

Technical content prepared by

Checked and approved by

Interdisciplinary coordination checked by

Authorised for release

Signature

Date

Name Richard Adams Andy Tankard Andy Tankard Graham Bradshaw

Position Manager Safety and Risk Assurance

Principal Manager SQER

Principal Manager SQER

Director Network Standards and Services

mailto:[email protected]

mailto:[email protected]

http://www.asa.transport.nsw.gov.au/

Boundary Fences

T HR CI 12160 ST

Standard

Version 1.0

Issued date: 04 October 2016

Important Warning

This document is one of a set of standards developed solely and specifically for use on Transport Assets (as defined in the Asset Standards Authority Charter). It is not suitable for any other purpose.

You must not use or adapt it or rely upon it in any way unless you are authorised in writing to do so by a relevant NSW Government agency. If this document forms part of a contract with, or is a condition of approval by a NSW Government agency, use of the document is subject to the terms of the contract or approval.

This document is uncontrolled when printed or downloaded. Users should exercise their own skill and care in the use of the document.

This document may not be current. Current standards may be accessed from the Asset Standards Authority website at www.asa.transport.nsw.gov.au.

© State of NSW through Transport for NSW

http://www.asa.transport.nsw.gov.au/

T HR CI 12160 ST Boundary Fences

Version 1.0 Issued date: 04 October 2016

Standard governance

Owner: Lead Civil Engineer, Asset Standards Authority

Authoriser: Chief Engineer, Asset Standards Authority

Approver: Executive Director, Asset Standards Authority on behalf of the ASA Configuration Control Board

Document history

Version Summary of changes

1.0 First issue

For queries regarding this document, please email the ASA at [email protected] or visit www.asa.transport.nsw.gov.au

© State of NSW through Transport for NSW



Preface The Asset Standards Authority (ASA) is an independent unit within Transport for NSW (TfNSW)

and is the network design and standards authority for defined NSW transport assets.

The ASA is responsible for developing engineering governance frameworks to support industry

delivery in the assurance of design, safety, integrity, construction, and commissioning of

transport assets for the whole asset life cycle. In order to achieve this, the ASA effectively

discharges obligations as the authority for various technical, process, and planning matters

across the asset life cycle.

The ASA collaborates with industry using stakeholder engagement activities to assist in

achieving its mission. These activities help align the ASA to broader government expectations

of making it clearer, simpler, and more attractive to do business within the NSW transport

industry, allowing the supply chain to deliver safe, efficient, and competent transport services.

The ASA develops, maintains, controls, and publishes a suite of standards and other

documentation for transport assets of TfNSW. Further, the ASA ensures that these standards

are performance-based to create opportunities for innovation and improve access to a broader

competitive supply chain.

This document supersedes ESC 510 Boundary Fences, version 2.1.

The ASA approved this standard and it is a first issue.

© State of NSW through Transport for NSW Page 3 of 21



Table of contents 1. Introduction .............................................................................................................................................. 5

2. Purpose .................................................................................................................................................... 5 2.1. Scope ..................................................................................................................................................... 5 2.2. Application ............................................................................................................................................. 5

3. Reference documents ............................................................................................................................. 6

4. Terms and definitions ............................................................................................................................. 7

5. Safety requirements ................................................................................................................................ 8

6. Environmental, sustainability and heritage requirements .................................................................. 8

7. Survey requirements ............................................................................................................................. 10

8. Design ..................................................................................................................................................... 10 8.1. Stock fence .......................................................................................................................................... 11 8.2. Residential fence ................................................................................................................................. 11 8.3. Urban fence ......................................................................................................................................... 12 8.4. Enhanced urban fence ......................................................................................................................... 12 8.5. Security fence ...................................................................................................................................... 12 8.6. High security fence .............................................................................................................................. 13 8.7. Access gates ....................................................................................................................................... 13 8.8. Locks .................................................................................................................................................... 14 8.9. Insulation panels .................................................................................................................................. 14

9. Acceptance standards .......................................................................................................................... 15

10. Construction .......................................................................................................................................... 15

11. Maintenance ........................................................................................................................................... 16 11.1. Damage limits .................................................................................................................................. 17 11.2. Maintenance response .................................................................................................................... 19 11.3. Repairs ............................................................................................................................................. 20

12. Decommissioning or disposal ............................................................................................................. 20




1. IntroductionA boundary fence is a fabricated fence that is designed, constructed and positioned for physical

separation of the railway corridor or right of way from the adjoining land.

The intention with a boundary fence is to identify and protect the rail corridor or right of way.

All Transport for NSW (TfNSW) lines within the metropolitan rail area are classified as fenced

lines in accordance with legislation authorising their construction. Boundary fences shall be

provided on TfNSW lines with the exception of locations where natural boundaries exist.

Conditions outlined within this standard are deemed to be the minimum requirements for

boundary fences, with nothing precluding them being exceeded.

2. PurposeThe purpose of this standard is to provide technical requirements to facilitate the design,

construction, maintenance and decommissioning of boundary fences.

The intention of this standard is to mitigate the risks associated with individuals and livestock

accessing the rail corridor or right of way. This access may be intentional trespass or otherwise.

It is also intended that this standard will mitigate the risk of the location of the rail corridor

boundary or right of way not being correctly identified.

2.1. Scope This standard provides minimum boundary fence requirements across the full life cycle.

Where a conflict exists between an Australian Standard and this standard, the requirements of

this standard take precedence.

This standard does not cover substation fencing requirements, which are covered in

EP 99 00 00 07 SP Substation Fencing.

This standard does not cover demarcation fencing requirements, which are covered in SPC 512

Demarcation Fences.

This standard does not cover station precinct fencing requirements, ESB 003 Station Functional

Spaces defines these requirements.

This standard does not cover landscape-fencing requirements.

2.2. Application The requirements of this document apply to boundary fences on the TfNSW heavy rail network.

However, its principles are applicable to any type of rail network (including light rail) regardless

of location.




Competent personnel engaged in the provision of services relating to rail infrastructure shall use

this standard. Compliance with the requirements in this standard is not, by itself, sufficient to

ensure the production of satisfactory outcomes. Personnel providing services based on this

standard shall bring appropriate expertise to the matters under consideration.

In addition to the requirements of this standard, asset decisions shall take into account the life

cycle cost considerations specified in T MU AM 01001 ST Life Cycle Costing.

The reader shall seek clarification from the ASA if the intent of stated requirements in this

standard is not clear.

3. Reference documents The following documents are cited in the text. For dated references, only the cited edition

applies. For undated references, the latest edition of the referenced document applies.

Australian standards

AS 1725.1 Chain link fabric fencing – Part 1: Security fences and gates – General requirements

AS 2423 Coated steel wire fencing products for terrestrial, aquatic and general use

AS 7644 Rail Corridor Access

Transport for NSW standards

30-ST-164 TfNSW Enterprise Risk Management (TERM) Standard (available on request via

email to: [email protected])

EP 99 00 00 07 SP Substation Fencing

ESB 003 Station Functional Spaces

ESC 100 Civil Technical Maintenance Plan

RSS-002 Stabling Locations and Maintenance Centres (available on request via e-mail to:

[email protected])

SPC 511 Boundary Fences

SPC 512 Demarcation Fences

SPG 0708 Small Buildings and Location Cases

TMC 511 Boundary Fences

T MU AM 01001 ST Life Cycle Costing

TS 20001 System Safety Standard for New or Altered Assets

Transport for NSW standard drawings

CV 0285948 Boundary fences – Tubular steel fence details – General arrangement




CV 0478382 Boundary fences – Tubular steel fence insulation panel – General arrangement

CV 0478385 Boundary fences – Close space welded mesh insulation panel – General

arrangement

CV 0478388 Boundary fences – Strand wire stock fence insulation panel – General

arrangement

Legislation

Environmental Planning and Assessment Act 1979

Government Railways Act 1912 and later Acts

Heritage Act 1977

Other reference documents

Office of Environment and Heritage January 2005, State Agency Heritage Guide – Management

of Heritage Assets by NSW Government Agencies, publication number HO05/01

4. Terms and definitionsThe following terms and definitions apply in this document:

Authorised Engineering Organisation (AEO) a legal entity (which may include a Transport

Agency as applicable) to whom the ASA has issued an ASA Authorisation

ASA Asset Standards Authority

boundary fence a physical fabricated structure built to bar or deter passage to the rail corridor

or right of way corridor. A boundary fence separates the railway corridor or right of way corridor

from the adjoining land

demarcation fence a fabricated fence provided to delineate the boundary of work areas

metropolitan rail area the rail freight network and the rail passenger network within the

metropolitan rail area bounded by Newcastle (in the north), Richmond (in the northwest),

Bowenfels (in the west), Macarthur (in the southwest) and Bomaderry (in the south), and all

connection lines and sidings within these areas, but excluding private sidings

natural boundary a boundary formed and presented by nature. Examples of natural

boundaries include banks of rivers and streams, edges of lakes and lagoons, the coastline,

ridge crests and the edge or foot of a cliff. Where a natural boundary is the coastline or tidal

inlet of the sea, the limit of the boundary is the local mean high-water mark. Natural boundaries

may advance or recede with the natural deposition or erosion of soil as long as the natural

process has taken place gradually and imperceptibly.

OHW overhead wiring




rail corridor the land between the boundary fences over which a railway line passes or, where

there are no fences, the extent of land owned, leased, or otherwise used by the rail owner or

leaseholder or state

right of way an easement annexed to land to travel over other land of different ownership in a

particular manner

station precincts an area encompassing the station platform and station access

substation fencing the perimeter fence, which surrounds all existing and new TfNSW owned

electrical system and distribution substations, section huts and switchyards

TERM TfNSW Enterprise Risk Management Standard

TfNSW Transport for New South Wales

TfNSW facilities comprises all railway track, railway stations and ancillary buildings, civil works,

associated track structures, over track structures, signalling systems, train control systems,

communication systems, equipment, nodes, conduits, ducting, cable, cable support structures

and other plant, equipment, buildings or facilities owned, leased or used by TfNSW on, or in any

way comprising, the rail corridor

trespass the unauthorised access to the rail corridor by a person, livestock, or vehicle.

Trespass can be intentional or unintentional.

urban fence a fence which separates the rail corridor from a populated environment

5. Safety requirementsThe design of boundary fences shall take into account safety considerations for construction,

operational, maintenance and decommissioning workers; and of the potential users of the

fence.

The Authorised Engineering Organisation (AEO) shall establish and implement a design

process system that manages safety assurance across the full life cycle of the structure.

Development of the design process system shall be in accordance with TS 20001 System

Safety Standard for New or Altered Assets.

6. Environmental, sustainability and heritagerequirementsThe design of a boundary fence, including the refurbishment of an existing fence, shall consider,

assess and minimise environmental impacts and maximise sustainability opportunities across

the full life cycle.




The design shall conform to contemporary best practice in environmental and sustainability

consideration and implementation. Considerations relating to boundary fences include the

following:

• use of materials that are recycled

• use of durable materials that will last the planned operational life as per the asset

management cycle

• use of materials with the lowest possible toxicity

• protection or enhancement of biodiversity

• visual impact and amenity

• resilience to climate change

• ability and ease of maintenance and retro-fitting improvements over time

• reusability, recyclability or disposal at life cycle end

• heritage value

The Environmental Planning and Assessment Act 1979 and the Heritage Act 1977 govern

environment and heritage management. The Environmental Planning and Assessment Act

requires the appropriate assessment of environmental impacts resulting from development. This

includes impacts on heritage items. The Heritage Act is the relevant legislation designed to

protect, conserve and manage environmental heritage, including items of archaeological

significance. The provisions of the Heritage Act apply for all proposed changes for items listed

on the State Heritage Register. The principles and relevant guidelines contained in the NSW

Office of Environment and Heritage State Agency Heritage Guide – Management of Heritage

Assets by NSW Government Agencies apply for heritage items listed on the Section 170 State

agency heritage register.

Maintenance and design changes to heritage-listed boundary fences shall respect and maintain

their heritage significance. Such work shall result in minimal adverse visual and physical

heritage impacts, not only upon the boundary fences themselves, but also on their setting and

broader landscape context.

The concept design should satisfactorily address all relevant environmental factors, including

heritage significance, at a sufficiently early stage of a project. All design stages involving

modification of boundary fences shall take into account the anticipated maintenance

requirements for maintaining and conserving the heritage fabric stages. Alternative approaches

to conservation, including appropriate means of protecting significant fabric from damage and

vandalism, may be required for boundary fences (and remnant sections of boundary fences)

that are no longer being used.




7. Survey requirementsAs required, the AEO shall conduct a boundary survey prior to the commencement of the

design of a new or replacement boundary fence. This survey shall establish the correct railway

boundary locations.

8. DesignNew and replacement boundary fences shall be designed to provide the following:

• afford a measure of security and safety by restricting unauthorised access to the railway

corridor, right of way or TfNSW facilities

• discourage livestock from entering the railway corridor or right of way

• mark the boundary of the railway corridor or right of way

This standard shall be read in conjunction with TMC 511 Boundary Fences, which details fully

the design process, installation and maintenance aspects.

Guidance on the type of fence to be used at a particular location is provided in section 5 of

TMC 511 Boundary Fences. Where a risk assessment is required, this shall be carried out in

accordance with 30-ST-164 TfNSW Enterprise Risk Management Standard (TERM).

An indication of the typical risks considered as part of the risk assessment is contained in

AS 7644:2015 Rail Corridor Access

Note: AS 7644 is produced and maintained by RISSB

Fencing for train stabling facilities shall be high security fencing in accordance with Section 8.6

of this standard. Refer to TfNSW security standard RSS-002 Stabling Locations & Maintenance

Centres for further details.

Fencing for electrical substations, section huts and switch-yards is detailed in RailCorp

Electrical Engineering Specification EP 99 00 00 07 SP Substation Fencing.

An investigation shall be undertaken in advance of design to facilitate the gate and fence

selection.

Investigations include but are not limited to the following:

• third-party consultation

• a site visit

• an examination of existing boundary fence maintenance records

• a desktop study to determine existing and future operational requirements




Existing fences that do not comply with current design requirements shall be upgraded when

the fence is due for renewal, or when enhancement is required as determined by a risk

assessment in accordance with 30-ST-164.

There are six types of TfNSW heavy rail fencing as follows:

• stock fence

• residential fence

• urban fence

• enhanced urban fence

• security fence

• high security fence

Concertina short-barbed tape shall only be used on top of fences with a minimum height of

2400 mm.

There are locations on the network where a site-specific boundary fence design will be required.

In these instances, the design shall provide functional performance that is equivalent to or better

than the standard designs in this document.

Constructability, access for maintenance, or other authorised access, emergency access and

ease of demolition shall be considered during the design process.

8.1. Stock fence The stock fence shall be one of the following approved configurations:

• strand wire

• hinged joint mesh with additional plain and barbed wires

The fence shall comply with SPC 511 Boundary Fences.

8.2. Residential fence The standard residential boundary fence is a hardwood timber-paling fence.

A proprietary steel fence in accordance with manufacturer’s specifications or urban fence may

also be used.

The insulation panel requirements as specified in Section 8.9 of this standard apply to

proprietary steel fences.

Residential fences shall be 1800 mm high.





8.3. Urban fence The urban fence shall be 1800 mm high plain top chain-link fabric fence in accordance with

AS 1725 Chain link fabric fencing. AS 1725 provides for four standard configurations as follows:

• rail-less

• top rail only

• bottom rail only

• top and bottom rail

For fencing without top rail, bracing panels or bracing stays shall be used on all ends, corners

and gateposts, and at 150 m spacing on straight sections.


For station precinct fencing requirements, reference shall be made to ESB 003 Station

Functional Spaces.

8.4. Enhanced urban fence The approved configurations for the enhanced urban fence are as follows:

• extra heavy duty mesh in accordance with AS 2423 Coated steel wire fencing products for

terrestrial, aquatic and general use in the urban fence, that is, 25 mm mesh size with

3.15 mm diameter wire, or 50 mm mesh size with 4.00 mm diameter wire

• attachment of three barbed wire strands on top of the urban fence

• increased height of the urban fence to 2100 mm or 2400 mm in accordance with AS 1725

Chain link fabric fencing

• a 2100 mm high tubular steel fence in accordance with standard drawing CV 0285948

• a 2400 mm high tubular steel fence.in accordance with standard drawing CV 0285948

The fences shall comply with SPC 511 Boundary Fences.

Fencing of buildings for housing of signalling equipment shall be 1800 mm high chain-link fabric

fence with three barbed wires on top. Refer to TfNSW specification SPG 0708 Small Buildings

and Location Cases for details.

8.5. Security fence The approved configurations for the security fence are as follows:

• 2400 mm / 2700 mm high close spaced welded mesh fence

• 2400 mm / 2700 mm high palisade fence




Tamper resistant, security-type fasteners shall be used.


Other types of security fencing may be used at specific sites subject to the approval of the Lead

Civil Engineer, ASA. The fence shall provide at least equivalent performance to the close space

welded mesh fence.

Signal buildings requiring security fencing within the rail corridor shall have a security fence in

accordance with this standard.

8.6. High security fence Approved configurations for the high security fence are as follows:

• 3000 mm high close spaced welded mesh fence

• 3000 mm high palisade fence

• 2400 mm high close spaced welded mesh fence with 600 mm concertina short-barbed tape


Fence products used in high security fences shall be endorsed by the Australian Government

Security Construction and Equipment Committee.

8.7. Access gates In all types of fencing, access for infrastructure and corridor maintenance together with

emergency access shall be considered as part of the risk assessment. Wherever such access is

warranted, gates shall be provided. No gates are allowed in boundary fences adjoining

residences. The gates shall comply with requirements in SPC 511 Boundary Fences.

Matters considered in the provision of emergency access shall include, but not be limited to,

those sections of the corridor prone to:

• flood

• rock falls

• landslips

• fire

• derailment

The standard rail boundary gate sign shall be attached to each gate. The sign layout is specified

in SPC 511 Boundary Fences.




8.8. Locks Drop bolts shall be in accordance with the standard drawings showing the gate details.

Standard drawings are specified in SPC 511 Boundary Fences.

All keying shall be of a restricted type that is compliant with the current TfNSW keying hierarchy.

Locks shall be vandal and weather resistant mechanical devices.

Details of the current boundary key and lock devices shall be obtained from TfNSW.

8.9. Insulation panels Insulation panels, a minimum of 2200 mm in length, are required in metallic fencing in the

electrified area to break the fence up into short electrically isolated sections. The panels consist

of the fence material with supporting posts that are non-metallic.

The panels are installed where ‘continuous’ fencing results in the following occurring:

• would otherwise approach within 2 m of an overhead wiring (OHW) structure (including any

metallic attachments to the OHW structure such as switch handles, back anchor guy rods

and so on)

• would otherwise approach within 2 m of station fences, foot bridges, rail bridges, entrance

fences and metallic buildings

• runs parallel to, and within 2 m of, above ground metallic signalling/cable troughing or air

lines

The insulating panels shall be located directly adjacent to the insulated joint in the

signalling/cable troughing or air lines

• meets any high voltage substation fence (either TfNSW or local electricity distributor)

Where the substation earth mat extends outside the substation fence, the continuous

fencing shall not enter the area of the earth mat.

• meets any pole mounted or pad mounted substation (either TfNSW or local electricity

distributor)

The ‘continuous’ fencing shall not enter the area of the earth mat. The continuous fencing

shall also not be closer than 2 m from any part of a pad mounted substation including any

earthed opening doors of the pad mount to prevent touch potential hazards. The same

principle applies to traction substations, sectioning huts and pole mounted substations.




Insulation panels shall be installed as follows:

• to ensure that persons cannot contact ‘continuous’ fencing and any other metallic surface

such as OHW structures, station fences (associated with the station low voltage earthing

system and water pipes) and footbridges that extend outside TfNSW property

• at approximately 300 m intervals in the ‘continuous’ fencing (with a maximum spacing of

800 m in areas away from above ground signal troughing)

The non-metallic posts shall have a clearance of minimum 50 mm and maximum 100 mm from

the adjacent metallic post of the ‘continuous’ fencing. Each non-metallic post shall have a

warning sign attached as shown on the standard drawings CV 0478382, CV 0478388 and

CV 0478385.

The bottom rail shall be installed to remain 80 mm clear of the ground. The insulation panel

details are specified in SPC 511 Boundary Fences.

Overbridges and underbridges shall be isolated from conductive structures and conductive parts

approaching them (for example, trackside boundary fences). This can be achieved by inserting

an insulation panel 2 m away from the edge of the bridge structure. Reference shall be made to

drawing CV 0478385 for further details. Care shall be taken not to bridge insulation panels by

means of conductive material such as metallic conduits.

Security and high security fences

When installing security and high security fencing, the fence shall be designed and positioned to

reduce or eliminate the requirement for insulation panels. Where insulation panels are required

and cannot be avoided, they shall be of a design that complements the high security

performance of these fence types.

The insulation panels for security and high security fences shall comply with SPC 511 Boundary

Fences.

9. Acceptance standards All materials and components shall comply with the requirements of the relevant specified

Australian Standard, or of the technical specification in this Standard.

Test certificates shall be provided to TfNSW to demonstrate compliance with performance

requirements.

10. Construction The design documentation shall identify standards for construction, including construction

methods, processes and materials.




Boundary fences shall be constructed in accordance with the technical specifications in

SPC 511 Boundary Fences.

Construction details for chain-link fences such as line and level, spacing of posts, footings,

bracing panels/stays, connection of components and barbed wire extensions shall be in

accordance with AS 1725 Chain link fabric fencing.

During construction of a new or replacement boundary fence, the need for temporary protection

measures for the rail corridor or right of way shall be considered as part of the overall risk

assessment.

The design shall take into account construction restraints, particularly construction activities

during live road and rail operating conditions as well as restrictions associated with construction

work during track possession.

Paddock dividing fences and private property dividing fences shall not be constructed with

connections to boundary fences. Paddock dividing fences and property dividing fences shall

terminate on their own end post.

Where a boundary fence is constructed on an existing curved boundary, the fence is to be

constructed as a series of chords or tangents with the distance between posts reduced.

Where the boundary line is intersected by a permanent waterway, the boundary fence is to be

constructed as returned to the abutments of the bridge or culvert as a 'wing' fence.

The location of the boundary fence across small variable flow waterways shall be designed to

avoid flood damage to the fence.

11. Maintenance Maintenance requirements shall be specified in the form of a technical maintenance plan in the

design documentation of the boundary fence. The requirements shall include examination tasks

and frequencies, damage limits and repair standards. In most cases, ESC 100 Civil Technical

Maintenance Plan will apply. However, it may be necessary to document site-specific

maintenance requirements.

Fence condition shall be assessed against the damage limits specified in Section 11.1 of this

standard. The maintenance responses to damage limits are specified in Section 11.2 of this

standard.

Repairs shall comply with the requirements specified in Section 11.3 of this standard.




11.1. Damage limits Damage limits for boundary fences are shown in Table 1 for stock fences, Table 2 for residential

fences, Table 3 for urban fences, Table 4 for enhanced urban fences, Table 5 for security

fences and Table 6 for high security fences.

Table 1 – Stock fence damage limits

Damage type Damage size Response category

Minor damage Impacts upon general integrity N

Strand or mesh wire sagging Loss of tension P3

Strand or mesh wire broken Broken P2

Gap below insulation panel < 40 mm P3

Table 2 – Residential fence damage limits


Minor damage, except hole Impacts upon general integrity N

Hole Minor, max size 150 mm x 150 mm

P3

Hole > 150 mm x 150 mm P2

Gap below fence > 80 mm, ≤ 150 mm P3

Gap below fence > 150 mm P2


Table 3 – Urban fence damage limits




P3


Gap below fence (bottom rail) > 80 mm, ≤ 150 mm P3

Gap below fence (bottom rail) > 150 mm P2

Gap below fence (no bottom rail)

> 0 mm, ≤ 80 mm P3


> 80 mm P2

Gap between gates ≤ 75 mm P3

Gap between gates > 75 mm P2

Gap below gates > 80 mm, ≤ 150 mm P3





Gap below gates > 150 mm P2


Table 4 – Enhanced urban fence damage limits




P3


Pale bent Gap to adjacent pale > 100 mm, ≤ 150 mm

P3

Pale bent Gap to adjacent pale > 150 mm P2




> 0 mm, ≤ 80 mm P3


> 80 mm P2






Table 5 – Security fence damage limits


Minor damage, except hole Impacts upon general integrity P3


P2



P2

Pale bent Gap to adjacent pale > 150 mm P1












Table 6 – High security fence damage limits


Minor damage, except hole Impacts upon general integrity P2


P1

Hole > 150 mm x 150 mm E2


P1

Pale bent Gap to adjacent pale > 150 mm E2


Gap below fence > 100 mm E2


Gap between gates > 75 mm E2


Gap below gates > 100 mm E2


11.2. Maintenance response Defects shall be categorised into one of the standard response categories shown in Table 7.

Table 7 – Defect response categories

Response category Inspect and verify response Action

Emergency 2 (E2) Within 2 hours or before the next train, whichever is the greater

Repair within 24 hours Consider special security patrols until fence is made secure

Priority 1 (P1) Within 24 hours Repair within 7 days

Priority 2 (P2) Within 7 days Repair within 28 days

Priority 3 (P3) Within 7 days Program for repair

Normal (N) Nil Routine inspection




The response category in Table 7 may be modified after an assessment of site-specific risks.

Factors to include in the risk assessment are as follows:

• adjacent to public traffic area (that is, next to public road, platform and so on)

• evidence of regular use (for example, well-worn path, worn ballast shoulder and so on)

• proximity to areas such as school, playgrounds or other children's congregation locations

• embankment or cutting, risk of falling

• high risk locations, such as substations, deep culvert

• driver visibility risk factors, such as narrow cuttings or blind curves

The risk assessment may result in either the 'inspect' response or the 'action' response being

modified. The response may go up a level or down a level.

11.3. Repairs Repairs to the fence shall achieve equivalent performance to a fence in as new condition.

All materials used for repairs shall comply with the design specification.

12. Decommissioning or disposal Decommissioning is the final process of withdrawing an asset, such as a boundary fence and

foundations, from active service on the network.

Disposal is the process of removing an asset from the network. For example, demolition of a

boundary fence and foundations, followed by removal and recycling.

The decommissioning or disposal of an asset is the final stage of the asset life cycle. Proper

planning of this part of the life cycle is an integral part of the strategic life cycle process.

The process for the disposal or decommissioning of a boundary fence shall include a report as

follows:

• A report shall be produced to confirm that the boundary fence is surplus to requirements or

that it is life expired.

• The report shall identify the benefits including financial and costs arising from the proposed

decommissioning or disposal.

• The report shall confirm stakeholder engagement regarding the proposed action. Such

engagement shall include, but not be limited to heritage, council and environmental body

consultation.

• The report shall include a decommissioning or disposal plan for implementation.




Following decommissioning or disposal, the asset database shall be updated to reflect network

changes.

Ninety five percent of construction and demolition waste by weight of the decommissioned asset

shall be diverted from landfill.


technical note - tn 082: 2016 - transport for nsw...this document is one of a set of standards...

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