overhead wiring structures and signal gantries · 2019. 5. 24. · t hr ci 12040 st: ohws design...

ASA Technical Forum: Civil August 2016 | 48 –

Overhead Wiring Structures and Signal Gantries T HR CI 12040 ST v1

Malcolm Peake, Senior Engineer Structures (Civil)

August 2016

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4· ·-~ I Transport NSW ,..,. .. _,, for NSW

Standard

T HR Cl 12040 ST

Overhead Wiring Structures and Signal Gantries

Version ·1.0

Issued j a:e 30 June 20 16

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Overhead wiring structures and signal gantries

Agenda • Overview• Supersedes ESC 330• TMC 331• Clarifications• Changes (Minor)• ASA template• Whole of life• AEOs• Definitions• AS 1170• Share knowledge

T HR CI 12040 ST (ASA v1 published 30 June 2016)

ASA Technical Forum: Civil – August 2016 | 3

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Overhead wiring structures PP mast Cantilever mast


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Signal gantry


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T HR CI 12040 ST: Introduction and Purpose

• Whole of life considerations• Supplements Australian standards• Specific TfNSW heavy rail

• Civil only (Structure support for OHW, electrical and signals equipmentover tracks)

• Loading• Deflections• Design life• Materials• Documentation• References (40+)


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T HR CI 12040 ST: Application

• Competent personnel (AEO)

• Compliance with standard by itself not sufficient

• Personnel to bring appropriate expertise

• Life cycle costing

• If not clear ASA

• Read with TMC 331 (how-to manual)


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T HR CI 12040 ST: TMC 331

• Guidance

• Examples

• Background

• Reasons

• History

• How to


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T HR CI 12040 ST: Safety

• WHS Act 2011

• AEO design process

• AEO assurance for full life cycle

• Examples: weights, access, barriers, heights, grilles

• Electrical safety screens & barriers

• Human Factors (T MU HF 00001 ST)

• Railsafe


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Overhead wiring structures

Feeder FSAM

Access, ladders, heights, weights, HF etc.


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T HR CI 12040 ST: Structures

• Standard structures (App A list)

• AEO satisfaction for all requirements

• Efficient designs

• Order of preference (PP>HP>SHS Portal>>>*)

• Justification* (Cantilever mast>double UC/UB portal)

• Non standard ASA approval

• Configuration (added cuttings, drainage, lock nuts)


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T HR CI 12040 ST: Ref. to lock nut detail

TMC 331 content


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T HR CI 12040 ST: Design

• OHW system by electrical AEO

• Associated requirements (including safety)

• Australian standards

• Other ASA standards

• 100 year life with minimum maintenance

• Civil designer to liaise with other disciplines

• Joint responsibility (structure position agreed)


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T HR CI 12040 ST: OHWS design actions

• Maximum and Minimum loads

• Staging

• Out of balance

• Wire movement

• Broken OHW effects

• OHW loads by electrical AEO via loading diagram


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T HR CI 12040 ST: Typical electrical loading diagram


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T HR CI 12040 ST: OHWS design actions (loads) • AS 1170

Permanent

• Static Weight (P)

• Radial (P)

• Regulated tension (P)

• Fixed anchor tension (P)

• Weight stack (P)

Imposed

• 1.1 kN person or higher*

Wind

• Inputs for AS1170


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T HR CI 12040 ST: OHWS deflection

(1) Wind only

• contact wire lateral < 50mm

(2) Permanent only

• Table 2 aesthetic limits more generous than AS 4100

• Compare mid & end points

• Rake and camber can be used


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T HR CI 12040 ST: Signal gantry design actions

• Equipment loads by signal AEO

• AS 1170: permanent, imposed,wind

• AS 1657: platforms, walkways,ladders etc.

• Deflection limits less generousthan OHWS


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T HR CI 12040 ST: OHWS anchor structures

• Configuration by electrical AEO

• Order of preference

(guy footing > FSAM* / rock* > structures* > bridges**)

• Justification*


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T HR CI 12040 ST: Footings

• Standard footings preferred (App A list)

• Standard footing capacity guidance (table 5 and 6)

(suited to existing regulated systems)

• Geotechnical on-site verification (structure diagram)

• Global stability

• AEO ensure all requirements satisfied

• If standard not possible Site specific

Site specific footing

Recognised method, specific geotechnical parameters, on site verification, design limits, documentation, not spread type, prefer standard but deeper.


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T HR CI 12040 ST: Attaching to infrastructure

• Not compromise structures integrity or design life or standards

• Not on bridge unless unavoidable

• Proven stainless steel chemical anchors’

(with documentation, parameters, testing insulation, criteria etc.)

• Earthing and bonding


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T HR CI 12040 ST: Drawings

• TfNSW CAD Standard (T MU MD 00006ST)

• Detailed requirements in TMC331

• Whole of life information

• Title block requirements

• Structure diagram requirements


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T HR CI 12040 ST: Typical structure diagram

On standard CAD drawing with standard title block.

+ Notes + References + Special details + Geo parameters + On site req. + Hazards


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T HR CI 12040 ST: Existing OHWS for Reuse

• When OHW system upgrade or increased loading

(E.g. Wire adjustments, conversion, modification)

• Relaxed deflection limit for permanent actions only

(mainly to satisfy conversion from fixed to regulated OHW systems)

• Wind only wire movement limit not relaxed

• Consider whole of life costs (repair or replace)


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T HR CI 12040 ST: Construction

• SPC 301

• AS 4100

• AS 3600

• Project specific specification by AEO

• Drawings to contain all for completeness of spec

• All construction constraints to be accounted for


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T HR CI 12040 ST: Maintenance and disposal

• Provide for inspection and maintenance and disposal

• Minimise maintenance

• ESC 100 CTM Plan

• ESC 302 Defects Limits

• T MU AM 01003 ST Development of TMPs

• Disposal report (life expired, benefits, stakeholders, risk, plan etc)


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T HR CI 12040 ST: OHWS and signal gantries

Feedback and questions


Overhead Wiring Structures and Signal Gantries T HR CI 12040 ST v1 Overhead wiring structures and signal gantriesOverhead wiring structures Signal gantryT HR CI 12040 ST: Introduction and PurposeT HR CI 12040 ST: Application T HR CI 12040 ST: TMC 331T HR CI 12040 ST: Safety Overhead wiring structuresT HR CI 12040 ST: StructuresT HR CI 12040 ST: Ref. to lock nut detailT HR CI 12040 ST: Design T HR CI 12040 ST: OHWS design actionsT HR CI 12040 ST: Typical electrical loading diagram T HR CI 12040 ST: OHWS design actions (loads)T HR CI 12040 ST: OHWS deflectionT HR CI 12040 ST: Signal gantry design actionsT HR CI 12040 ST: OHWS anchor structuresT HR CI 12040 ST: FootingsT HR CI 12040 ST: Attaching to infrastructureT HR CI 12040 ST: DrawingsT HR CI 12040 ST: Typical structure diagramT HR CI 12040 ST: Existing OHWS for ReuseT HR CI 12040 ST: ConstructionT HR CI 12040 ST: Maintenance and disposalT HR CI 12040 ST: OHWS and signal gantries

overhead wiring structures and signal gantries · 2019. 5. 24. · t hr ci 12040 st: ohws design...

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