Working on Suspended Powered Scaffolds SWMS

Suspended powered scaffolds — swing stages, single-point and twin-point cradles — are high-consequence elevated work platforms relied upon for facade installation, window cleaning, sealant works and remedial concrete repair on multi-storey structures. Operating these platforms involves daily pre-start inspection of wire ropes, motors, secondary brake systems and rigging, alongside disciplined harness anchorage to an independent lifeline, strict weight loading compliance and live monitoring of wind speed and weather fronts. Under WHS Regulation 2025 section 291, work performed from a suspended powered scaffold is classified as High Risk Construction Work because of the fall hazard exceeding 2 metres and the catastrophic outcome profile of cable, motor or rigging failure. A Safe Work Method Statement is mandatory before the work commences, must be developed in consultation with operators and riggers, must be available at the workplace, and must be reviewed if a cable failure, near miss or rescue is triggered. This SWMS documents the controls, sequencing and rescue arrangements required to discharge the PCBU's primary duty of care under section 19 of the WHS Act.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination — Where facade access can be achieved from a mast climber, EWP or permanent building maintenance unit (BMU), eliminate the suspended scaffold option entirely during design and methodology review.
2. 2Elimination — Schedule all rigging, dismantling and high-risk maintenance during nil-wind, daylight-only windows to remove environmental hazard exposure from the critical path.
3. 3Substitution — Substitute twin-point swing stages for single-point bosun chairs wherever task duration exceeds two hours, reducing rotational instability and single-rope failure consequence.
4. 4Engineering — Install an independent static lifeline anchored to a separately certified structural point (not the cradle frame) for each worker's full-body harness and rope grab in accordance with AS/NZS 1891.4.
5. 5Engineering — Use platforms fitted with secondary centrifugal brake and overspeed governor compliant with AS 1418.13, tested and tagged within the last 12 months by a competent person.
6. 6Engineering — Fit calibrated anemometer at platform level with audible alarm set to trigger at 35 km/h and automatic descent lockout above 40 km/h sustained wind speed.
7. 7Administrative — Conduct documented daily pre-start inspection of wire ropes, motor, brakes, rigging, counterweights and harness equipment using the manufacturer checklist before each shift, recorded and signed.
8. 8Administrative — Implement a written rescue plan with on-site rescue kit, trained rescuer on the ground, two-way radio communication and maximum 10-minute response time to suspension trauma.
9. 9PPE — Workers wear full body harness compliant with AS/NZS 1891.1 with shock-absorbing lanyard and rope grab attached to independent lifeline, plus suspension trauma relief straps.
10. 10PPE — Issue hard hat with chin strap (AS/NZS 1801), high-visibility clothing (AS/NZS 4602.1), tool tethers rated to tool weight and non-slip safety footwear (AS/NZS 2210.3).

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a 22-storey residential tower facade sealant remediation project, the leading hand opens this SWMS at the 6:30am pre-start brief on level 21 roof plant deck. The two-person crew reviews the hazard register — particularly wind exposure, independent lifeline anchorage and the rescue plan — before signing the consultation register. Together they walk through the daily pre-start inspection: counterweight tally against rigging calc, wire rope condition along the full drum length, secondary brake test drop, motor function, harness and lanyard certification tags. The on-deck anemometer reads 18 km/h gusting 26 km/h, within the 35 km/h SWMS trigger, so descent is authorised. Mid-shift, the wind picks up to a sustained 33 km/h with forecast worsening; the leading hand consults the SWMS wind matrix, calls a controlled return to the parapet, secures the cradle and escalates to the site supervisor. The crew remains tied to the independent lifeline throughout the return, not the cradle frame, exactly as the engineering controls require. The SWMS is annotated with the wind-down event, re-signed before recommencement after the front passes, and the daily inspection record is filed with the principal contractor. This live use of the document at pre-start and during a dynamic weather change is what distinguishes a working SWMS from a filing-cabinet document.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• Managing the Risk of Falls at Workplaces CoP

Frequently asked questions