Timber Chainsaw Processing SWMS

Chainsaw processing of felled or delivered timber — including cross-cutting to length, bucking logs into manageable sections, and limbing branches from stems — exposes operators to some of the highest-risk mechanical and ergonomic hazards in the timber industry. The combination of a high-speed cutting chain, unpredictable timber tension, kickback forces, and continuous hand-arm vibration triggers multiple duties under the WHS Regulation 2025, including hazardous manual tasks (Part 4.2), noise (Part 4.1), and plant safety (Part 5.1). A Safe Work Method Statement is mandatory before chainsaw operations commence because the work involves a recognised high-risk activity with potential for serious crush, laceration and amputation injuries, and the PCBU must demonstrate documented risk assessment, control selection and worker consultation under s38 of the model Act. This SWMS captures the engineering, administrative and PPE controls necessary to lawfully run a chainsaw processing task and provides the pre-start sign-on framework required by principal contractors and forestry operators.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

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

1. 1Elimination — Eliminate manual chainsaw bucking where possible by using mechanical processors, harvester heads or fixed bench docking saws for repetitive cross-cutting tasks.
2. 2Elimination — Remove operators from the cutting line of fire by establishing two-metre exclusion zones and never positioning the body in the kickback arc.
3. 3Substitution — Substitute petrol chainsaws with low-vibration battery-electric models for short cuts, reducing HAVS exposure and refuelling fire risk under AS/NZS ISO 5349.
4. 4Engineering — Use chainsaws fitted with low-kickback chains, chain brakes, anti-vibration mounts and front and rear hand guards compliant with AS/NZS 2727:2020.
5. 5Engineering — Use sawhorses, log dogs or timber jacks to secure stock, eliminating stored-tension uncertainty and reducing pinch-bind on the guide bar during bucking.
6. 6Administrative — Implement a maximum 2-hour trigger-time roster with rotation to limit daily HAVS exposure below the EAV under the WHS Regulation 2025 vibration provisions.
7. 7Administrative — Conduct daily chainsaw inspection covering chain tension, sharpness, chain brake function, throttle interlock and bar oil delivery, recorded on a pre-start checklist.
8. 8Administrative — Refuel only on cooled saws, on bare ground, minimum 3 metres from ignition sources, using approved jerry cans compliant with AS 2906.
9. 9PPE — Wear AS/NZS 4453.3 chainsaw protective leg chaps or trousers, AS/NZS 2161 cut-resistant gloves, and steel-capped chainsaw boots to AS/NZS 2210.3.
10. 10PPE — Wear a forestry helmet system incorporating AS/NZS 1801 hard hat, AS/NZS 1337 mesh visor and AS/NZS 1270 Class 5 earmuffs for combined head, eye and hearing protection.

Applicable Codes of Practice

Worked example

At a regional plantation processing yard, a two-person crew is rostered to cross-cut a stack of delivered pine logs into 2.4-metre fence posts. Before the saws start, the leading hand opens the Timber Chainsaw Processing SWMS on a ruggedised tablet at the smoko shed and walks both operators through the hazard register. The crew identifies that today's logs are stacked under tension on a sloped skid site, so they flag stored-tension release and kickback as the day's priority risks. Controls are selected from the document: log dogs are deployed to lock each piece before cutting, the 2-metre exclusion zone is marked with bunting, and a 90-minute trigger-time rotation is agreed to manage HAVS exposure. Both operators complete the daily chainsaw pre-start inspection on the checklist appendix, confirming chain brake function and bar oil delivery, then sign the SWMS register noting the specific saw serial numbers and PPE worn. Mid-morning, the second operator notices a log binding on the bar during a bucking cut — they stop work, re-open the SWMS, and apply the documented control of repositioning the log dog and starting an undercut. The adjustment is recorded as a SWMS variation, initialled by the leading hand, and work resumes safely.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• Hazardous Manual Tasks CoP; AS/NZS 4024 — Safety of machinery

Frequently asked questions