The 18 HRCW Categories Explained (With Examples for Every Trade)

"Is a SWMS legally required for this job?" is the most common question we get from tradies. The answer is always the same: check if the work involves any of the 18 High-Risk Construction Work (HRCW) categories. If yes, a SWMS is legally required before work starts. If no, a SWMS is not strictly required — though most principal contractors will still ask for one before granting site access.

The problem is that the 18 HRCW categories are written in legal language that doesn't always translate to what you're actually doing on site. This post breaks down every single category in plain English, with real examples for the trades that commonly hit them.

Where the 18 categories come from

The 18 HRCW categories are defined in Regulation 291 of the Work Health and Safety Regulations in most Australian states (or the equivalent provisions in Victoria's OHS Regulations 2017). They're the same 18 across every harmonised state — Victoria uses the same definitions under its separate OHS framework.

The 18 categories, one by one

1. Risk of a person falling more than 2 metres

The big one. Any work where a worker could fall more than 2 metres — from a roof, scaffolding, ladder, edge of a slab, open penetration, mezzanine, or any elevated platform. This is the category that catches almost every trade on almost every construction site.

Who hits this: roofers (always), carpenters (framing, truss work), scaffolders (always), painters (exterior work), HVAC technicians (rooftop units), solar installers (always), electricians (ladder work on commercial sites), bricklayers (multi-storey walls), plasterers (ceiling work on scaffold).

Common SWMS controls: edge protection per AS/NZS 4994.1, fall-arrest harnesses per AS/NZS 1891.1, scaffolding per AS/NZS 1576, rescue plans for any harness-only work.

2. Work on or adjacent to roads, railways, shipping lanes or other traffic corridors

Working next to moving traffic. This includes roadside work, median strips, railway corridors, airport aprons, and industrial sites with forklift/truck traffic. It doesn't include work on a quiet residential street where the only traffic is the occasional car — it's about corridors with sustained vehicle movement.

Who hits this: fencers (roadside fencing), civil contractors (road construction), line markers, traffic management crews, anyone installing signage near highways.

Common controls: traffic management plans, high-vis Class D clothing per AS/NZS 4602.1, controlled vehicle zones, advance warning signs, spotters.

3. Work in an area with movement of powered mobile plant

Any site where there's plant equipment moving around — excavators, forklifts, bobcats, cranes, trucks, concrete pumps. This is the second-biggest catch-all category after falls.

Who hits this: excavation contractors (always), concreters (concrete trucks), demolition contractors (always), scaffolders (material loading), steel fixers (working around cranes), literally any subcontractor on a commercial site with active plant.

Common controls: exclusion zones around plant, spotters for all movements, high-vis clothing, documented site traffic management.

4. Work on or adjacent to water with risk of drowning

Work where a worker could fall into water and drown — ponds, rivers, canals, harbour edges, construction in or near bodies of water, bridge work over water, pool construction at the early stages.

Who hits this: civil contractors (bridge work), pool installers, waterproofers working on water features, marine contractors.

Common controls: life jackets, rescue plans, water rescue equipment on site, restricted exposure time.

5. Work involving diving

Exactly what it says. Any commercial diving operation on a construction site — underwater welding, pier inspection, harbour construction, submerged pipeline work.

Who hits this: commercial divers, marine construction specialists.

Common controls: dive plans, surface support, decompression schedules, AS/NZS 2299 compliance.

6. Work in a confined space

A confined space is any area that's partially or fully enclosed, not designed for people to occupy continuously, has restricted entry or exit, and has a risk from the atmosphere or contents — reduced oxygen, toxic gases, engulfment, or entrapment. Common examples: tanks, pits, vaults, manholes, underground chambers, some crawl spaces, silos, duct systems.

Who hits this: plumbers (sewer entry, pit work), HVAC technicians (ductwork), welders (tank repairs), electricians (underground pits), waterproofers (basement work).

Common controls: confined space entry permits, atmospheric testing per AS 2865, standby person, rescue equipment, ventilation, entry log.

7. Work involving demolition of a structure

Demolition of any load-bearing structural element. This includes both full building demolition and partial demolition — removing a wall, taking out a beam, pulling down a carport, cutting out a section of slab.

Who hits this: demolition contractors (always), builders doing renovations with structural changes, some civil contractors.

Common controls: engineer-certified demolition plan, temporary propping, hazardous materials survey (especially asbestos), exclusion zones, water suppression for dust.

8. Work involving the disturbance or removal of asbestos

Any work that could disturb asbestos-containing materials. This catches a lot of older-building trades unexpectedly — you might be installing air conditioning and accidentally drill through asbestos wall lining.

Who hits this: licensed asbestos removalists (always), demolition contractors on pre-1990 buildings, plumbers working on old pipe lagging, electricians drilling into old wall sheet, roofers removing fibre-cement products.

Common controls: asbestos register check, licensed removal for friable or >10m² non-friable, full containment, PPE including respirator, air monitoring, notification to regulator.

9. Structural alteration requiring temporary support

Work where you're modifying a structure and it needs temporary support to prevent collapse during the modification. Think removing a load-bearing wall and propping the floor above, cutting a new opening in a structural wall, replacing deteriorated beams, underpinning work.

Who hits this: builders doing renovations, carpenters doing structural alterations, demolition contractors on partial demolitions, some concreters doing concrete repairs.

Common controls: engineer-designed temporary support, propping to AS 3610, load calculations, inspection before removal of permanent support.

10. Work in or near a trench or shaft more than 1.5 metres deep

Any excavation or trench deeper than 1.5 metres. The 1.5m threshold is not a suggestion — below it, you don't need a SWMS; at or above it, you do.

Who hits this: excavation contractors (always), plumbers (drainage work), civil contractors, concreters (footings), solar installers (ground-mount systems).

Common controls: Dial Before You Dig search, shoring/benching/battering per AS 4976, edge barriers, ladder access every 7.5m, atmospheric testing for deeper excavations.

11. Work on or near pressurised gas distribution mains or piping

Work near live gas mains or pipes. Includes natural gas, LPG, and industrial gases. The "pressurised" part matters — depressurised/isolated gas lines are a lower hazard class.

Who hits this: plumbers doing gas fitting (always), civil contractors working near gas mains, HVAC technicians on commercial systems, demolition contractors, excavation contractors.

Common controls: gas line identification, isolation procedures, gas monitoring, hot work permits, emergency response plan, AS 5601 compliance for gas fitting.

12. Work on or near chemical, fuel or refrigerant lines

Same principle as gas lines but for other hazardous fluids. Refrigerant lines (aircon, chillers), fuel lines (service stations, industrial), chemical process piping.

Who hits this: HVAC technicians (always), refrigeration mechanics, petroleum industry contractors, chemical plant maintenance crews.

Common controls: identification of line contents, isolation procedures, line pressure testing, refrigerant recovery (for HVAC), ARC licence compliance, spill containment.

13. Work on or near energised electrical installations

Any work on or near live electrical installations — switchboards, overhead power lines, underground cables, substations, or any live circuit. This is the big one for electricians but it catches many other trades too.

Who hits this: electricians (always), solar installers (DC side is always live when panels see light), HVAC technicians (mains connections), excavation contractors (underground services), crane operators (overhead power clearances), roofers (overhead lines near roofs).

Common controls: LOTO isolation, test for dead before touching, minimum approach distances to live equipment, insulated tools per AS/NZS 4836, exclusion zones around overhead lines (minimum 6.4m for mobile plant), RCDs on all site power.

14. Work in areas with artificial extremes of temperature

Work environments with deliberate temperature extremes — cold rooms, furnaces, cool stores, industrial ovens, cryogenic facilities, boiler rooms. Not about working outside in summer heat (that's heat stress management, different category).

Who hits this: refrigeration technicians, commercial kitchen installers, cold storage contractors, industrial maintenance crews.

Common controls: exposure time limits, protective clothing rated for the temperature, buddy systems, monitoring, heated/cooled rest areas.

15. Work in areas with risk of inundation (flooding)

Work where flooding could happen suddenly — tidal zones, stormwater drainage during rain events, areas below a dam or retention pond, tunnels, deep excavations in high-water-table areas.

Who hits this: civil contractors (drainage work), tunnelling crews, stormwater maintenance, marine construction.

Common controls: weather monitoring, dewatering pumps, evacuation procedures, tide/flood warnings, escape routes.

16. Work involving tilt-up or precast concrete elements

Tilt-up construction (pouring concrete panels flat and standing them up) and precast installation (placing factory-made concrete components). These are high-hazard because of the massive loads, crane operations, and temporary bracing requirements.

Who hits this: tilt-up contractors, precast installers, crane operators on these jobs, steel fixers working alongside, concreters.

Common controls: engineered lift plan, certified rigging, temporary bracing design, exclusion zones during lifts, licensed dogger/rigger involvement, crane operator licences.

17. Work on telecommunications towers

Climbing and working on telecommunications towers — mobile phone towers, broadcast towers, microwave links. Specialist high-risk work with its own licensing regime.

Who hits this: telecommunications riggers (specialist trade), occasionally electricians working on tower power systems.

Common controls: tower climbing licences, fall-arrest systems, rescue plan, weather limits, worker certification.

18. Work involving use of explosives

Any use of explosives on site. Includes demolition explosives, quarry blasting, and some specialist concrete breaking. Requires explosives handling licences on top of the SWMS.

Who hits this: specialist blasting contractors, some demolition contractors, quarrying operations.

Common controls: explosives handling licence, exclusion zones, detonation plan, regulatory notification, specialist operator certification.

How to use this list

If you're planning a job and you're not sure whether a SWMS is required, walk through these 18 categories and ask "does any part of this work involve any of these things?" If yes to any of them, you need a SWMS before work starts. That's the legal test.

A few practical points:

• A single job can hit multiple categories. A typical demolition job might hit categories 7 (demolition), 8 (asbestos), 10 (trenching), 3 (plant), and 13 (electrical services). Your SWMS needs to address all of them.
• The 2-metre and 1.5-metre thresholds are not suggestions. Below them, you're not in HRCW territory. At or above, you are. Measure if you're not sure.
• "Near" and "adjacent to" mean within the hazard zone, not just "on the same site." A powerline 50 metres away isn't triggering category 13 for your electrical work. A powerline 4 metres above your crane boom absolutely is.
• When in doubt, assume yes. If you're genuinely not sure whether your work qualifies as HRCW, prepare a SWMS. The worst case is you have a document you didn't legally need. The other worst case is a prohibition notice, a fine, or worse — a worker injured on work that should have been properly controlled.

Generate a trade-specific SWMS

QuickSWMS automatically identifies which HRCW categories apply to your job based on the details you enter. When you generate a SWMS for roofing work, the AI marks category 1 (falls). For excavation work, it marks category 10 (trenches). For plumbing, it considers categories 10, 11, 12, and 1. You don't have to manually figure out which categories apply — we do that for you.

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