Site safety management on Australian construction sites operates under the Work Health and Safety (WHS) Act and Regulations (harmonised across most states/territories, with some variation e.g. in Victoria's OHS framework).
The central obligation is that a Person Conducting a Business or Undertaking (PCBU) must, so far as reasonably practicable, eliminate or minimise risks to health and safety.
Key Roles and Duties
| Role | Primary Duty |
|---|---|
| PCBU (employer/contractor) | Primary duty of care to workers and others affected by the work |
| Officer (e.g. director) | Due diligence: must actively ensure PCBU compliance |
| Worker | Take reasonable care for own and others' safety, follow instructions |
| Principal Contractor | Overall site safety coordination on construction projects |
High Risk Construction Work (HRCW)
WHS Regulations define specific categories of High Risk Construction Work requiring a Safe Work Method Statement (SWMS) before work begins:
| HRCW Category (examples) |
|---|
| Work involving a risk of a person falling more than 2 m |
| Work on or near energised electrical installations |
| Work in or near a trench/excavation deeper than 1.5 m |
| Demolition of load-bearing structures |
| Work involving asbestos |
| Use of explosives |
| Work near traffic corridors (roads, rail) |
Safe Work Method Statements (SWMS)
A SWMS documents the high-risk work activity, the hazards involved, and the control measures to be applied, and must be developed before HRCW commences and be available on site.
A compliant SWMS must:
- Identify the work activity and the specific HRCW category
- Identify hazards associated with the work
- Describe control measures, referencing the hierarchy of controls
- Describe how the controls will be implemented, monitored, and reviewed
- Be reviewed and, where necessary, revised if work changes or an incident occurs
Hierarchy of Controls
$$ \text{Most effective} \rightarrow \text{Least effective} $$| Level | Control | Example |
|---|---|---|
| 1 | Elimination | Prefabricate off-site to remove at-height work |
| 2 | Substitution | Use a lighter material to reduce manual handling risk |
| 3 | Engineering controls | Guardrails, mechanical lifting aids |
| 4 | Administrative controls | Permits, training, signage, exclusion zones |
| 5 | PPE | Hard hats, harnesses, respiratory protection |
PPE is the last line of defence, not the primary control: SWMS should demonstrate that higher-level controls were considered first.
Site Safety Documentation
| Document | Purpose |
|---|---|
| WHS Management Plan | Overall project safety framework |
| SWMS | Task-specific high-risk work controls |
| Site Induction | General site hazards and rules for all personnel |
| Permits (hot work, confined space, excavation) | Task-specific authorisation and controls |
| Incident/Hazard Register | Record and track hazards and incidents |
Incident Notification
Certain incidents must be notified to the relevant WHS regulator immediately, including:
- Death of a person
- Serious injury or illness (e.g. requiring hospital admission)
- Dangerous incidents (e.g. structural collapse, uncontrolled escape of a substance): even without injury
The site must generally be preserved until an inspector attends or directs otherwise.
Practical Notes
- A SWMS that simply lists PPE without engineering or administrative controls will not meet the "so far as reasonably practicable" standard, and is a common audit failure point.
- SWMS must be a live document: reviewed when conditions or methods change, not filed away once and forgotten.
- Principal contractors carry overarching site safety coordination duties even when subcontractors manage their own crews: SWMS review and site induction records should reflect this oversight.