High Risk Construction Work: The HRCW Categories That Require a SWMS

High Risk Construction Work (HRCW) is any construction activity that falls within the 18 categories listed in Schedule 1 of the WHS Regulation 2025. If your work triggers even one of these categories, you must prepare a Safe Work Method Statement (SWMS) before the work begins. No exceptions, no thresholds, no minimum job values.

The HRCW categories exist because certain construction activities carry a substantially higher risk of death or serious injury than routine work. Working at heights, demolition, excavation, confined space entry, work near live electricity — these are the activities that kill and maim workers at a rate far above the general rate for construction. The SWMS requirement forces PCBUs to plan these activities, identify hazards, implement controls, and communicate the plan to workers before anyone starts.

This page is your definitive reference for every HRCW category. For each one, we explain what it covers, give practical examples, and flag the common triggers that tradies miss. Bookmark this page. Reference it when you are scoping a new job and need to determine whether a SWMS is required.

The most common mistake: assuming your work does not trigger HRCW. Most tradies underestimate the scope of the HRCW categories. A landscaper who uses a mini excavator is doing HRCW. A painter who works above 2 metres on a ladder is doing HRCW. A plumber who trenches deeper than 1.5 metres for drainage is doing HRCW. The categories are broader than most people think and Australian regulators apply them broadly rather than narrowly when deciding whether a SWMS was required.

Category 1 — Work involving a risk of a person falling more than 2 metres. This is the most commonly triggered HRCW category in Australian construction. Any work on a roof, scaffold, mezzanine, EWP, ladder, or elevated surface above 2 metres requires a SWMS. This includes accessing a ceiling void via a ladder above 2 metres. It includes standing on a scaffold platform above 2 metres even if guardrails are in place. The trigger is the risk of falling 2 metres, not the absence of fall protection. In Victoria the equivalent threshold under the OHS Regulations 2017 is 2 metres as well.

Category 2 — Work on a telecommunications tower. Construction, maintenance, or modification of telecommunications infrastructure. Height, radiofrequency radiation, and structural loading are the primary hazards. This category captures both greenfield tower construction and the ongoing maintenance and upgrade work on the national telecommunications network.

Category 3 — Work involving demolition of a load-bearing element or an element related to the physical integrity of a structure. Any demolition that affects the structural integrity of a building or other structure. This includes complete building demolition, removal of load-bearing walls during renovation, strip-out of structural elements, and dismantling of plant and equipment where structural members are involved. Demolition requires a licensed demolisher in many jurisdictions and a demolition work plan alongside the SWMS.

Category 4 — Work involving the disturbance of asbestos. Any work that involves the removal, encapsulation, or likely disturbance of asbestos-containing material. This category applies whenever work is carried out on a building or structure that contains asbestos, including renovation work on pre-1990 residential and commercial properties. A licensed asbestos removalist (Class A for friable, Class B for bonded) and a separate asbestos removal control plan are required for any work above the minor maintenance threshold.

Category 5 — Work involving structural alterations or repairs that require temporary support to prevent collapse. Renovation, restoration, or repair work where temporary propping, bracing, or other structural support is necessary to maintain stability during the work. Common on heritage restoration, beam replacement, and wall removal projects.

Category 6 — Work in or near a confined space. Any construction work in a space that is enclosed or partially enclosed, not designed for continuous human occupancy, and has limited entry and exit. Cable pits, ceiling voids with restricted access, storage tanks, valve chambers, and trenches with limited egress all commonly qualify. Confined space entry requires gas testing, a standby person, a rescue plan, and often a permit-to-work system layered on top of the SWMS.

Category 7 — Work involving excavation to a depth of more than 1.5 metres. Excavation where the trench, shaft, or pit exceeds 1.5 metres depth. This is where trench collapse kills workers in Australia every year. Irrigation trenching, drainage installation, foundation excavation, pool excavation, and service trenching all commonly exceed 1.5 metres. Shoring, benching, or battering is mandatory whenever workers enter an excavation that triggers this category.

Category 8 — Work involving tunnels. Construction, repair, or maintenance of a tunnel. Includes temporary tunnels for construction access as well as permanent infrastructure tunnels. Tunnelling carries high risks of collapse, atmospheric hazards, water ingress, and limited egress.

Category 9 — Work involving the use of explosives. Controlled blasting for rock excavation, demolition using explosive charges, and any construction activity involving explosive substances. Requires licensed shot-firers, specific blast management plans, and coordination with local authorities and neighbouring landholders.

Category 10 — Work on or near pressurised gas distribution mains or piping. Construction work on or adjacent to pressurised gas infrastructure. Common when excavating near gas mains for utility connections or when performing hot taps on pressurised pipework. Requires coordination with the gas network operator and strict adherence to the network operator's safety standards.

Category 11 — Work on or near chemical, fuel, or refrigerant lines. Similar to gas mains, any construction work that involves breaking into or working adjacent to chemical, fuel, or refrigerant pipework. Common on industrial sites, petrol stations, and commercial refrigeration facilities. Requires isolation, verification, and purging procedures specific to the substance involved.

Category 12 — Work on or near energised electrical installations or services. Any construction work that involves contact with, or proximity to, live electrical installations. Switchboard upgrades, cable installation near energised circuits, work near overhead powerlines, and any electrical testing or commissioning work. This is one of the most frequently fatal HRCW categories — electrical contact kills instantly and without warning.

Category 13 — Work in an area that may have a contaminated or flammable atmosphere. Construction in areas with known atmospheric hazards — former industrial sites, petrol station forecourts, areas with accumulated flammable vapours, confined spaces with oxygen deficiency or enrichment. Requires atmospheric testing and, where required, ventilation or hot-work permits layered on the SWMS.

Category 14 — Work involving tilt-up or precast concrete elements. Erection of tilt-up concrete panels or installation of precast concrete elements. Panel collapse during erection is catastrophic — a single tilt-up panel can weigh 10 to 20 tonnes. Requires engineered propping plans, lifting plans, and temporary bracing procedures. Precast element installation on commercial and infrastructure projects is a frequent trigger.

Category 15 — Work on, in, or adjacent to a road, railway, shipping lane, or other traffic corridor in use by traffic other than pedestrians. Any construction work within a road reserve, on a footpath adjacent to live traffic, or near an operational railway line or shipping lane. This covers utility trenching in road reserves, footpath construction, roadside landscaping, bridge maintenance, rail corridor works, and port-side construction. Requires a traffic management plan coordinated with the relevant road or rail authority.

Category 16 — Work on a construction site where there is any movement of powered mobile plant. Any construction activity involving powered mobile plant — cranes, forklifts, excavators, skid steers, EWPs, concrete pumps, rollers, graders, telehandlers, and any other self-propelled or remote-controlled plant. This is the broadest HRCW category and the one most frequently underestimated. A landscaper using a mini excavator, a painter using a scissor lift, a concreter using a concrete pump, a demolisher using a telehandler — all trigger this category.

Category 17 — Work in areas with artificial extremes of temperature. Work in freezer rooms, furnace areas, pressurised vessels, or environments where temperature extremes could cause injury through heat stress, burns, or cold exposure. Less common in general building construction but relevant for cold storage fit-outs, industrial plant construction, and specialist pressure vessel work.

Category 18 — Work in or near water or other liquid that involves a risk of drowning. Construction near rivers, canals, dams, coastal areas, or any water body where a worker could fall in and drown. Includes work over water on temporary platforms, work from EWPs over water, and work on commercial marine structures. Requires personal flotation devices, rescue plans, and in some cases supervised water rescue standby.

Most construction jobs trigger multiple HRCW categories. Here are common multi-category scenarios that tradies encounter every day across Australia.

Electrical fit-out of a commercial building: Category 1 (working in ceiling void above 2 metres) plus Category 12 (energised electrical installations) plus Category 16 (scissor lift for cable tray installation). Three categories from a standard electrical job.

Residential demolition: Category 3 (demolition of load-bearing elements) plus Category 1 (working at heights during roof strip) plus Category 4 (asbestos — any building constructed before 1990 may contain ACM) plus Category 16 (excavator for structural demolition). Four categories.

Road resurfacing: Category 15 (work adjacent to traffic) plus Category 16 (roller, paver, profiler). Two categories, with hot bitumen posing additional chemical and temperature hazards managed under the general duty of care.

Solar panel installation on a two-storey house: Category 1 (roof work above 2 metres) plus Category 12 (DC electrical connection to the main switchboard), with potential Category 16 if a boom lift is used for commercial installs. Two to three categories for what most residential installers treat as routine work.

Landscaping with irrigation on a residential property: Category 16 (mini excavator) plus Category 7 (trench deeper than 1.5 metres for the irrigation main) plus potentially Category 15 (roadside landscaping with traffic exposure). Two to three categories.

Commercial warehouse fit-out with racking: Category 1 (installation at heights) plus Category 16 (forklift and scissor lift operation) plus Category 5 (structural alterations involving temporary support during steel installation).

The SWMS must address every category that applies. Missing a category means missing the hazards associated with it, and missing hazards means missing controls. A competent digital SWMS builder automatically identifies applicable HRCW categories based on your trade and activity selections, which helps catch categories a preparer might not have considered.

Three things happen, in escalating order of severity.

First: on-the-spot fine. NSW inspectors can issue an immediate penalty notice when HRCW is being performed without a SWMS — $3,600 for an individual and $18,000 for a body corporate. No investigation, no court appearance. An instant financial hit and a public compliance record. Other jurisdictions are moving toward similar on-the-spot enforcement as part of the broader shift to visible, immediate consequences.

Second: improvement or prohibition notice. The inspector issues a notice requiring you to stop the HRCW until a SWMS is prepared, reviewed, and signed by workers. A prohibition notice means the work in the affected area stops immediately — no production, no progress, and every other trade on site waiting for the paperwork to be sorted. On a large project this can cost tens of thousands of dollars in delay costs per day.

Third: prosecution. If a worker is injured during HRCW that did not have a SWMS — or had an inadequate SWMS — the regulator will investigate and is likely to prosecute. Fines in prosecution range from $100,000 to $11,150,183 depending on the severity category, with Category 1 offences carrying up to 10 years imprisonment for individuals. Industrial manslaughter charges are available in every Australian jurisdiction for the most serious cases.

The absence of a SWMS is the easiest thing for a regulator to prove. It is a binary check — either the document exists or it does not. There is no grey area, no technical defence, and no room for mitigating interpretation. SafeWork NSW has reported in recent annual reports that failure to prepare a SWMS for HRCW is consistently among the most common breaches identified during proactive construction inspections. It is also the most preventable. A compliant, site-specific SWMS takes minutes to build with a guided digital builder.