Post-Tension Cable Installation SWMS
SWMS template for post-tension cable installation. Covers Strand placement, stressing operations, exclusion zone.. 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.
Post-tension cable installation is one of the most energy-intensive activities on a structural concrete site. Strand placement, anchorage seating, and hydraulic stressing operations release stored elastic energy in excess of 200 kN per strand, and a single uncontrolled release can be fatal. This Safe Work Method Statement (SWMS) has been prepared for steel fixers, post-tensioning crews, and principal contractors carrying out unbonded or bonded PT works on slabs, transfer beams, and suspended structures across all Australian jurisdictions.
Under the model Work Health and Safety Act 2011 and WHS Regulation 2011 (and the harmonised state equivalents), post-tensioning is classified as High Risk Construction Work (HRCW) under Regulation 291 because it involves the use of pressurised gas or fluid (hydraulic stressing jacks), work where there is a risk of a person being struck by a moving object (cable whip), and work involving stored energy in excess of normal handling thresholds. Section 299 of the WHS Regulation requires that a SWMS be prepared before HRCW commences, kept available for inspection, and reviewed if controls are revised or an incident occurs.
This document aligns with the Safe Work Australia Construction Work Code of Practice, AS 3600 Concrete Structures, and AS 1418.5 stressing equipment requirements. It provides a defensible written record that the PCBU has consulted workers, identified hazards, and implemented the hierarchy of control as required by Section 36 of the WHS Regulation.
Hazards identified
6 hazards covered, sorted by priority.
Fatal lacerations, amputation, or penetrating trauma from strand travelling at high velocity along the exclusion zone axis
Hydraulic fluid injection injury, eye injury, or jack ejection causing severe crushing or fatal impact
Projectile injury to head, face, or torso; fatality if struck in line of fire behind the live end
Acute musculoskeletal injury, crush injury to hands and feet during decoiling, chronic back injury
Worker or other trade struck by failed strand or ejected anchorage component
Fall onto reinforcement, lacerations, fractures, or fall from formwork edge
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Establish a hard-barricaded exclusion zone behind the live (stressing) end and dead end extending a minimum of the cable length plus 2 m laterally and 5 m longitudinally, with 'Stressing in Progress – No Entry' signage in accordance with AS 1319
- 2Only licensed and competent post-tensioning operators (manufacturer-certified, e.g. VSL, BBR, Freyssinet) to carry out stressing; operator competency records held on site
- 3Pre-start inspection of hydraulic jack, pump, gauges, and hoses; calibration certificates current within 6 months and gauge accuracy verified to ±2%
- 4Hydraulic hoses fitted with whip-check restraints at every coupling and rated to a minimum 1.5× working pressure
- 5Operators and assistants positioned to the side of the jack — never directly behind in the line of fire — and remote-control stressing pumps used where available
- 6Sequential stressing in accordance with the engineer's stressing schedule; elongation recorded and cross-checked against calculated values before lock-off
- 7Mandatory PPE: impact-rated face shield over safety glasses (AS/NZS 1337.1), hard hat, steel-cap boots (AS/NZS 2210.3), cut-resistant gloves, hi-vis, and long sleeves during all stressing
- 8Daily toolbox talk and SWMS sign-on before each stressing shift; stop-work authority communicated to all workers in the vicinity
- 9Strand cutting only after grout has cured (bonded systems) or anchorage has been confirmed seated for a minimum 24 hours; use abrasive disc, never oxy
- 10Emergency response plan including hydraulic injection injury procedure (immediate hospital transfer, do not treat as a puncture wound) communicated to all crew
Applicable Codes of Practice
Defines stressing operations as HRCW requiring a SWMS prior to commencement
Specifies the legal content requirements of this SWMS document
Provides guidance on hazard identification and exclusion zone management for HRCW
Sets design and construction requirements for prestressed concrete including stressing tolerances
Applies to lifting and positioning of strand coils and stressing equipment
Specifies impact-rated face shields mandatory during stressing
Applies to edge protection during PT works on suspended slabs
High-Risk Construction Work triggered
Hydraulic stressing jacks operate at pressures exceeding 700 bar (70 MPa), well above the threshold and one of the highest pressure systems used in construction
Strand recoil, wedge ejection, and anchorage blow-out can propel objects at lethal velocities along the cable axis during stressing failure
Strand coils and stressing equipment are positioned by mobile cranes and material hoists in proximity to the PT crew
Because this work falls within multiple HRCW categories under WHS Regulation r291, a written SWMS must be prepared before work commences (r299), made available to the principal contractor, and kept on site for inspection. Failure to comply attracts penalties up to $36,000 for a body corporate under the WHS Act, and Category 1 reckless conduct offences under Section 31 carry penalties of up to $3 million and 5 years imprisonment for a PCBU.
Who this is for
- →Steel fixing subcontractors carrying out PT strand placement on commercial and residential slabs
- →Licensed post-tensioning crews performing stressing and lock-off operations
- →Principal contractors and site managers required to review and accept subcontractor SWMS before HRCW commences
- →WHS managers and safety advisors auditing high-risk construction documentation
- →Formwork and concrete contractors coordinating with PT works on suspended slab pours
- →Self-employed PT specialists tendering to Tier 1 and Tier 2 builders
What you receive
- ✓Editable Microsoft Word (DOCX) SWMS template — fully customisable to your project, ABN, and crew
- ✓State-specific legislation schedule covering NSW, VIC, QLD, WA, SA, TAS, ACT, and NT WHS/OHS Acts and Regulations
- ✓Pre-populated hazard register with risk matrix scoring (likelihood × consequence) aligned to ISO 31000
- ✓Worker sign-on register for daily toolbox briefing and SWMS acknowledgement
- ✓Stressing exclusion zone diagram template with dimensioning guidance
- ✓Hydraulic equipment pre-start inspection checklist
- ✓Emergency response procedure including hydraulic injection injury protocol
- ✓CIH-reviewed content delivered as an instant download confirmation
- ✓Free minor revisions for 12 months as legislation updates
Worked example
A steel fixing subcontractor, Apex PT Pty Ltd, was engaged on a 14-level residential tower in Parramatta to install and stress 320 unbonded mono-strand cables across a Level 3 transfer slab. Before stressing day, the site supervisor downloaded this SWMS, populated the project details, attached the engineer's stressing schedule, and walked the document through with the four-person PT crew at the pre-start. The exclusion zone was barricaded with hard barriers extending 28 m longitudinally behind the live end, and 'Stressing in Progress' signage was erected at all access points. During stressing of cable 47, the operator noted a gauge reading 8% below calculated elongation and stopped work in accordance with the SWMS stop-work trigger. Investigation found a dirty wedge cavity; the cable was de-stressed using the documented procedure, the anchorage cleaned, and stressing recommenced. The completed SWMS, sign-on register, and stressing records were submitted to the principal contractor and retained on file. When SafeWork NSW conducted a routine HRCW audit two weeks later, Apex produced the SWMS within minutes and passed inspection without notice.
Related legislation
- Work Health and Safety Act 2011 (Cth model)
- Work Health and Safety Regulation 2011 — Part 6.3 Construction Work
- Occupational Health and Safety Act 2004 (VIC) and OHS Regulations 2017
- Work Health and Safety Act 2020 (WA) and WHS (General) Regulations 2022
- Work Health and Safety Act 2012 (SA) and WHS Regulations 2012
- Work Health and Safety Act 2012 (TAS)
- Work Health and Safety Act 2011 (QLD)
- Work Health and Safety Act 2011 (ACT)
- Work Health and Safety (National Uniform Legislation) Act 2011 (NT)
Frequently asked questions
Is post-tension stressing always classified as High Risk Construction Work?
Yes. Stressing operations involve pressurised hydraulic fluid above the regulatory threshold and a clear risk of being struck by moving objects (strand, wedges, anchorages). This satisfies multiple HRCW categories under WHS Regulation r291, and a written SWMS is mandatory before work commences.
How quickly will I receive the SWMS after purchase?
The editable DOCX is delivered to your nominated email as an instant download confirmation, often within a few hours during business days. The document is CIH-reviewed and ready for you to add your project, ABN, and crew details.
Does this SWMS cover both bonded and unbonded post-tensioning systems?
Yes. The hazard register and controls address both bonded (grouted multi-strand) and unbonded (greased mono-strand) systems, including grouting hazards and strand cutting timing differences. You can delete sections that do not apply to your specific job.
Is this template valid in all Australian states?
Yes. The SWMS is built on the model WHS Act and Regulation framework and includes a state-specific legislation schedule for NSW, QLD, WA, SA, TAS, ACT, and NT, plus a Victorian OHS Act 2004 / OHS Regulations 2017 mapping. You simply select the applicable jurisdiction for your project.
Who can sign off on this SWMS as the responsible person?
The PCBU (or their delegate — typically a site supervisor or project manager with sufficient authority and competency) must authorise the SWMS. Workers carrying out the work must also sign the acknowledgement register before commencing, as required under Regulation 300.
What happens if our stressing method changes mid-project?
Regulation 299(3) requires the SWMS to be reviewed and revised if controls are altered or are not effectively controlling risk. The editable DOCX format allows immediate amendment, and free minor revisions are included for 12 months to reflect any legislative changes.