Construction: WHS Management That Works When You're Not Looking
Respirable crystalline silica drops to 0.025 mg/m³ on 1 December 2026, and diesel particulate gets a limit for the first time. With 14 Codes of Practice becoming legally binding on 1 July 2026, the compliance burden for construction PCBUs has never been heavier — and the fines have never been less insurable.
What keeps construction managers up at night
Silica exposure in an era of tighter limits and mandatory registers
The respirable crystalline silica WEL drops 50% to 0.025 mg/m³ from December 2026, and the silica worker register has been mandatory since October 2025. Cutting, grinding, and drilling concrete generates silica dust at concentrations that may exceed the new limit unless controls are reassessed. A site that was compliant at 0.05 mg/m³ may find workers overexposed at 0.025 mg/m³ with identical processes. The Managing Risks of Respirable Crystalline Silica Code of Practice (February 2026) — now one of the newest codes and legally binding from July 2026 — requires documented assessment of every silica-generating task.
WHS Regulation 2025, Part 8A.1 (Silica worker register); Code of Practice — Managing risks of RCS (Feb 2026)
SWMS across multiple trades on one site
A principal contractor managing 12 subcontractors has 40+ active SWMS across the site. Each subcontractor submits their own, often in different formats, with varying levels of detail. The principal contractor must review every SWMS before high-risk construction work begins. When a process changes mid-project, the SWMS should update — but on a busy site, the updated document may never reach the workers who need it. If SafeWork NSW investigates an incident and finds the SWMS did not reflect the actual work being performed, the principal contractor shares liability.
WHS Regulation 2025, s.299-303 (SWMS for HRCW); 19 categories of high-risk construction work
Falls remain the leading cause of construction fatalities
Working at heights remains the most prosecuted area in NSW construction. Falls from scaffolding, leading edges, penetrations, and roofs account for a disproportionate share of SafeWork NSW improvement notices and prosecutions. Two separate codes — Managing Risks of Falls at Workplaces and Managing the Risk of Falls in Housing Construction — will both become legally binding on 1 July 2026. A principal contractor who cannot demonstrate they followed these codes (or documented a better approach) faces a prosecution where the code itself becomes the benchmark.
Code of Practice — Managing risks of falls at workplaces; Code of Practice — Managing the risk of falls in housing construction
What's changing for construction in 2026
WEL Impact (5 substances affected)
| Substance | Current WES | New WEL | Change | Effective |
|---|---|---|---|---|
| Silica (RCS) | 0.05 mg/m³ | 0.025 mg/m³ | -50% | 1 December 2026 |
| Diesel particulate matter | No current WES | 0.1 mg/m³ | NEW | 1 December 2026 |
| Wood dust (inhalable) | 1 mg/m³ | 0.5 mg/m³ | -50% | 1 December 2026 |
| Formaldehyde | 1 ppm | 0.3 ppm | -70% | 1 December 2026 |
| Portland cement | 10 mg/m³ | PNOS applies | Reclassified | Ongoing |
Section 26A Applicable Codes (14)
Penalty Exposure
How EHS Atlas solves this for construction
Your construction compliance calendar
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