Acoustic Wall Construction SWMS

Acoustic wall construction is the fit-out trade that builds sound-rated partitions to slab height: framing in light-gauge steel, packing the cavity with synthetic mineral-fibre insulation, and lining each face with multiple layers of high-density board to achieve a rated Rw sound-insulation performance. The dominant hazards are falls while fixing full-height framing and top track, respiratory and skin irritation from glasswool or rockwool insulation, respirable dust and noise from cutting dense board, and musculoskeletal injury handling heavy multi-layer sheets. This SWMS covers the acoustic framing, insulation and lining; it does not cover the ceiling, the services routed through the wall, or the acoustic design and post-installation sound testing, which are documented separately.

Under the model Work Health and Safety Act 2011 and the harmonised Work Health and Safety Regulations adopted in each state and territory, this is high risk construction work because full-height framing is carried out where a person can fall more than two metres and because installing fibre insulation and cutting dense board create an area requiring respiratory protection; Victoria operates the equivalent provisions under the Occupational Health and Safety Act 2004 and Occupational Health and Safety Regulations 2017. Sound-insulation performance is rated to AS/ISO 717.1 and AS 1276.1, light-gauge framing follows AS/NZS 4600, and respiratory protective equipment is selected and used to AS/NZS 1715 and 1716.

Failure to meet the primary duty of care is prosecuted under the Category 1 to 3 offences in the Work Health and Safety Act (and the equivalent provisions in Victoria's Occupational Health and Safety Act 2004), with maximum penalties indexed in most jurisdictions, imprisonment available for individuals, and a separate industrial manslaughter offence; current figures follow the prevailing penalty schedule of the responsible state regulator. This document is structured to satisfy the safe work method statement content requirements of the harmonised regulations and documents safe acoustic-wall construction.

Hazards identified

10 hazards covered, sorted by priority.

Control measures

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

1. 1Engineering: Ground-assemble frame sections where the system permits, and use a rated mobile scaffold or platform for top-track work at height, with platform inspection and no overreaching.
2. 2Substitution: Use pre-cut batts to limit on-site cutting, ventilate the work area during installation, minimise dry handling, and wear a P2 respirator, coveralls and gloves.
3. 3Engineering: Use a board trolley and panel lifter, with two-person handling for high-density sheets, a 25 kg single-person limit and the Hazardous Manual Tasks Code of Practice.
4. 4PPE: Use factory-cut lengths and deburring to reduce sharp edges and swarf, clear swarf from the floor, and wear cut-resistant gloves to AS/NZS 2161.3.
5. 5Substitution: Score and snap rather than power-cut high-density board, use on-tool dust capture for powered cuts and ventilate, and wear a P2 respirator to AS/NZS 1715 and 1716.
6. 6Engineering: Use low-noise tools and shears, limit continuous tool time against the 85 dB(A) eight-hour exposure standard to AS/NZS 1269, and provide hearing protection.
7. 7Engineering: Capture dust and ventilate the area, and wear sealed eye protection to AS/NZS 1337.1.
8. 8Engineering: Use a rated mobile scaffold on a firm level floor with castors locked, check the set-up before use and prohibit overreaching.
9. 9Substitution: Use screw fixing where suitable; otherwise the correct charge and guard, a licensed operator to AS/NZS 1873, and an exclusion in the line of fire.
10. 10Engineering: Fit toe-boards to platforms, set an exclusion zone below, tether tools at height and maintain housekeeping.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

A fit-out contractor is building acoustic-rated partitions to the slab between two tenancies, framing in steel, packing the cavity with rockwool, and lining each face with two layers of high-density board to meet a specified Rw rating. The work is high risk construction work both because the full-height framing is fixed above two metres and because the fibre insulation and board cutting create an area requiring respiratory protection, so the supervisor builds the safe work method statement around the fall risk and the airborne contaminants before work starts. Frame sections are ground-assembled where the system permits, and the top track is fixed from a rated mobile scaffold on the level slab with the castors locked, rather than from a trestle. Pre-cut batts are used to limit on-site cutting, the work area is ventilated during installation, dry handling is minimised, and workers wear a P2 respirator, coveralls and gloves to control fibre and skin contact, washing before breaks. High-density board is scored and snapped where possible, with on-tool dust capture and ventilation for any powered cut and a P2 respirator where dust persists, and low-noise shears keep cutting noise within the 85 dB(A) exposure standard with hearing protection worn. A board trolley and panel lifter with two-person handling move the dense sheets, and cut-resistant gloves and sealed eye protection control edges, swarf and airborne dust. Where framing is power-fixed, a licensed operator to AS/NZS 1873 uses the correct charge and guard with an exclusion in the line of fire, and a screw fixing is substituted where it will do the job. Toe-boards and an exclusion zone protect anyone below. Workers sign on to the statement before starting, the platform inspection and tool licence are verified, and the signed statement and the daily checks are kept on site for the responsible state regulator.

Related legislation

• Work Health and Safety Act 2011 (harmonised; enacted in all states and territories except Victoria, which applies the Occupational Health and Safety Act 2004), s.19 — Primary duty of care to workers and to other persons at or near the workplace
• Harmonised Work Health and Safety Regulations, section 291 — Defines high risk construction work (Victoria: Occupational Health and Safety Regulations 2017, Part 5.1)
• Harmonised Work Health and Safety Regulations, section 299 — Content and review requirements for a safe work method statement for high risk construction work (Victoria: regulation 327; Tasmania: regulation 312)
• Harmonised Work Health and Safety Regulations, Part 4.4 — Managing the risk of falls, including working from a solid construction or providing fall protection (Victoria applies the equivalent provisions of the Occupational Health and Safety Regulations 2017)
• Harmonised Work Health and Safety Regulations, Part 4.1 — Noise: the exposure standard of 85 dB(A) over eight hours and 140 dB(C) peak

Frequently asked questions