Transmission Line Construction (Towers) SWMS
SWMS template for transmission line construction (towers). Covers Tower erection, conductor stringing.. 8-state AU coverage, CIH-reviewed editable DOCX, available as an instant download.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Transmission line construction involving lattice steel tower erection and conductor stringing is among the highest-risk construction work undertaken in Australia, combining work at heights exceeding 40 metres, mechanical lifting of heavy steel sections, and proximity to existing energised high-voltage infrastructure. This SWMS template addresses the full sequence of tower assembly, crane-assisted erection, insulator hanging, and conductor pulling operations on transmission corridors typically operating at 132 kV, 275 kV or 500 kV. Under WHS Regulation 2011 r291 and the harmonised state equivalents, this work is classified as High Risk Construction Work on multiple grounds — work at height above 2 metres, work near energised electrical installations, work involving structural collapse risk, and work using powered mobile plant. A documented, signed and consulted SWMS is mandatory before work commences, must remain accessible at the workface for the duration of the activity, and must be reviewed whenever conditions, plant or personnel change.
Hazards identified
7 hazards covered, sorted by priority.
Fatal impact injuries, suspension trauma if arrested fall not retrieved within 15 minutes, prosecution under WHS Act s32
Electrocution, severe burns, ventricular fibrillation; capacitive coupling can induce lethal voltages on dead conductors
Multiple fatalities from falling steelwork, crush injuries to ground crew, total project loss
Severe lacerations, amputation, traumatic head injury from steel-cored aluminium conductor under several tonnes load
Penetrating head trauma, fractures, fatalities; bolts falling 40 metres reach terminal velocity of 80 km/h
Flashover to crane boom causing electrocution of operator and dogger, plant destruction, network outage
Heat stroke, dehydration-induced misjudgement at height, long-term skin cancer risk to riggers and linesmen
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Elimination — Where feasible, ground-assemble tower sections fully (including insulators and stringing blocks) and erect as complete modules to eliminate working time at full height.
- 2Elimination — Schedule stringing operations only after confirmed isolation and earthing of parallel circuits where induced voltage modelling shows hazardous coupling on the target span.
- 3Substitution — Substitute manual conductor pulling with hydraulic puller-tensioner units rated to 1.5x maximum design tension, eliminating manual handling of energised lines.
- 4Engineering — Install temporary earthing and bonding at every tower in the stringing section using copper earth leads rated to fault current, verified by EWP before workers contact conductors.
- 5Engineering — Use engineered fall arrest anchor points integrated into tower design, twin-lanyard 100% tie-off systems, and rescue plan with attendant-operated retrieval kit within 10 minutes.
- 6Engineering — Establish exclusion zones beneath tower per AS 2550.1 drop radius calculation, with hard barricades and spotters preventing entry during overhead work.
- 7Administrative — Conduct daily pre-start SWMS sign-on covering wind speed limits (cease at 36 km/h sustained), weather forecast, and isolation status of adjacent circuits confirmed by network operator.
- 8Administrative — Verify all riggers hold current Rigging Intermediate licence, EWP licence where applicable, and ESI live line / proximity training meeting AS 5577 competency requirements.
- 9Administrative — Implement permit-to-work system controlling crane approach distances per Safe Approach Distances in the relevant network operator's HV Live Work Code.
- 10PPE — Issue arc-rated clothing to ATPV 8 cal/cm² minimum, insulated gloves Class 2 tested in-date, hard hat with chinstrap, full-body harness AS/NZS 1891.1, and conductive footwear for stringing crews.
Applicable Codes of Practice
Sets structural, electrical clearance and earthing design parameters that construction sequence and temporary works must preserve during erection and stringing.
Mandates fall prevention hierarchy, anchor point certification and rescue planning for any work above 2 metres including all tower-top activities.
Governs mobile crane operation during tower erection including exclusion zones, lift planning, dogger competency and proximity to energised conductors.
Defines minimum approach distances to live HV apparatus that must be enforced during crane lifts, stringing and worker movement on adjacent towers.
High-Risk Construction Work triggered
Tower erection, bolt-up, insulator installation and stringing are conducted at heights routinely between 30 and 80 metres above ground.
Conductor stringing occurs on transmission corridors with parallel energised circuits producing induced voltages and crane proximity hazards.
Mobile cranes, elevating work platforms and puller-tensioner rigs move through the tower site and along the stringing corridor alongside the erection crew, including during crane release of a partially erected tower.
PCBUs must prepare, consult workers on, and retain the SWMS for two years after notifiable incidents; Category 1 breach penalties are substantial and indexed, with current maximum following the prevailing WHS schedule.
Who this is for
- →Transmission line construction principal contractors on network projects
- →Riggers and linesmen on tower erection crews
- →HSE managers for ESI infrastructure delivery contractors
- →Site supervisors coordinating stringing and crane operations
What you receive
- ✓Editable DOCX template — Microsoft Word compatible
- ✓State-specific WHS legislation schedule (NSW/VIC/QLD/SA/WA/TAS/NT/ACT)
- ✓Hazard register with risk ratings + hierarchy-of-control mapping
- ✓Worker sign-on register, pre-start checklist, and incident escalation flow
Worked example
On a 275 kV double-circuit transmission upgrade through rural farmland, a tower erection crew arrives at Tower 47 to complete bolt-up of the top cross-arm and prepare for the following day's stringing run. At the 6:30 am pre-start, the site supervisor opens this SWMS on a tablet at the laydown area and walks the four-person rigging team through each hazard line by line. The crew confirms wind forecast (peaks at 28 km/h, below the 36 km/h cease limit), reviews the fall arrest rescue plan, and signs on individually. During tower-top work at 52 metres, the leading hand notices a previously unflagged hazard: the parallel circuit on the adjacent transmission line, which was assumed isolated, shows induced voltage on a test stick reading of 180 V on the temporary earthing lead. He calls a stop-work, descends, and the supervisor pulls out the SWMS to consult the controls hierarchy — specifically the engineering control requiring verified earthing before conductor contact. The team adds a second equipotential bond at the next tower, re-tests, and amends the SWMS in pen under the 'site-specific variation' section, with all four workers re-signing. Work resumes 40 minutes later with the documented change available for the network operator's safety auditor visiting that afternoon.
Related legislation
- WHS Act 2011 (model)
- WHS Regulation 2025
- Managing the Risk of Falls at Workplaces CoP
Frequently asked questions
Which high risk construction work triggers apply to tower erection and stringing?
Three at once, and each has to be named in the document. Section 291(a) of the WHS Regulation applies because bolt-up, insulator hanging and stringing are done at 30 to 80 metres, far above the two-metre threshold. Section 291(k) applies because the work is on or near energised electrical installations — parallel circuits on the same corridor. Section 291(o) applies because cranes and elevating work platforms are moving in the work area. Section 299 then requires the SWMS to identify each trigger, set out the hazards and controls, and describe how those controls are implemented, monitored and reviewed.
How does the SWMS deal with induced voltage on a de-energised conductor?
By treating an isolated conductor as live until it is proven and bonded. Capacitive and inductive coupling from a parallel energised circuit can put a lethal potential on a conductor that is switched out, which is why the document requires temporary earthing and bonding at every tower in the stringing section, using earth leads rated to the prospective fault current, verified before any worker touches the conductor. It also requires isolation status to be confirmed with the network operator at each pre-start. If a test stick shows voltage on the earthing lead, that is a stop-work — add an equipotential bond, re-test, and record the variation.
What fall protection and rescue arrangements does it call for?
Engineered anchor points integrated into the tower design, a full-body harness to AS/NZS 1891.1, and twin lanyards giving one hundred percent tie-off during every climb and transfer — the moment of change-over is where linesmen come off. Rescue is the part most plans neglect: a worker suspended in an arrested fall can develop suspension trauma, so the SWMS requires an attendant-operated retrieval kit on the tower and a rescue plan capable of getting the person down inside about ten minutes. Ground crew are protected by a barricaded drop zone calculated on the work height, because a bolt dropped 40 metres is lethal.
How close can the crane work to a live circuit?
No closer than the safe approach distance set by the network operator's high voltage code and the ENA national guidelines, which vary with system voltage — 132 kV, 275 kV and 500 kV corridors are not the same number, and the boom, the load and the tag line all count. The SWMS controls this through a permit-to-work rather than operator judgement, with the approach distance written on the permit, a dedicated observer, and the lift planned under AS 2550.1. Weather is the other hard limit: stringing and tower-top work cease at 36 km/h sustained wind, confirmed at pre-start against the forecast.
What do I receive, and how do I record a change made at the workface?
You receive an editable Word document, purchased once, with a state legislation schedule for NSW, VIC, QLD, SA, WA, TAS, NT and ACT, the hazard register mapped to the hierarchy of control, a pre-start checklist, a worker sign-on register and an incident escalation flow. Site-specific variations are written into the document at the workface — the added bond, the revised drop zone, the changed isolation status — and every worker on the crew re-signs before work resumes. That amended, signed copy is what a network operator's safety auditor or the regulator asks to see, so keep it at the workface for the duration of the activity.
Document details
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