Working at Heights Regulations: A Plain-English Guide for WA

Every year, falls from height remain one of the leading causes of serious workplace injuries and fatalities across Western Australia. If you work in construction, maintenance, or any industry where elevated work is routine, understanding working at heights regulations is not optional. It is a legal and moral obligation.

Yet despite how critical this knowledge is, many workers and supervisors still find themselves navigating a maze of technical language, overlapping legislation, and conflicting advice. The result is confusion, non-compliance, and unnecessary risk.

This guide cuts through the complexity. Written specifically for WA workplaces, it breaks down the key working at heights regulations in plain, practical English so you can apply them with confidence on the job. You will learn which laws and standards apply to your work, what your duties are under the Work Health and Safety Act, how to assess and control height-related risks, and what documentation and training requirements you need to meet.

Whether you are a site supervisor, safety officer, or experienced tradesperson looking to solidify your compliance knowledge, this guide gives you the clarity you need to work safely and legally at heights.

The Legal Framework: What Laws Actually Apply in WA

If you are working at height anywhere in Western Australia, there is one piece of legislation that sits above everything else: the Work Health and Safety Act 2020 (WA). Enacted by Parliament on 3 November 2020 and commencing in March 2022, this Act replaced the long-standing Occupational Safety and Health Act 1984 and represented far more than a rebranding exercise. It introduced a fundamentally different, proactive approach to risk management across all high-risk work, including falls from height, and it is the primary legal reference point for every PCBU, worker, and safety professional operating in this state.

How WA Fits Into the National Picture

WA deliberately aligned its new legislation with Australia's harmonised Model WHS framework, the same foundation adopted by most other states and territories. Critically, however, WA enacted its own state Act rather than adopting the Model Act directly. This distinction matters in practice: WA's laws are administered locally, enforced locally, and interpreted through WA's own regulatory instruments. The accompanying Work Health and Safety (General) Regulations 2022 give the Act its operational teeth, with Part 4.4 of those Regulations specifically governing how PCBUs must manage fall risk in the workplace. For businesses operating across multiple states, the alignment with the harmonised framework makes cross-border compliance more straightforward, but WA-specific obligations still apply and should never be substituted with guidance from another jurisdiction.

The Risk-Based Trigger: Why There Is No Magic Number

One of the most important, and most frequently misunderstood, aspects of WA's current framework is that there is no single fixed height threshold that switches your legal obligations on or off. Under Regulation 78 of the WHS (General) Regulations 2022, a PCBU is required to manage risks of a fall from one level to another that is reasonably likely to cause injury, regardless of the actual distance involved. If a fall at a given height could realistically injure a worker, the duty to act exists. Full stop.

This is a meaningful shift from the old OSH Regulations, which specified a 2-metre threshold for scaffolds, fixed stairs, and suspended slabs, and a separate 3-metre threshold for other exposed edges. Those fixed numbers are gone. Duty holders must now apply genuine, ongoing professional judgement rather than simply measuring from the ground and deciding whether they've crossed a line.

To understand why this matters, it helps to compare WA's approach with Victoria's. Victoria's OHS Regulations 2017 (Part 3.3) set a specific 2-metre trigger for mandatory fall-risk controls, giving Victorian duty holders a clear, prescriptive benchmark. WA's risk-based model demands more; it requires you to assess the actual likelihood and consequence of injury at any height, every time. A fall from a loading dock step or a low roof platform may well trigger your obligations even if the drop is well under 2 metres.

For construction work specifically, a clearer threshold does apply: under Regulation 291, any work involving a risk of a person falling more than 2 metres qualifies as High Risk Construction Work, making a Safe Work Method Statement mandatory before that work begins.

WorkSafe WA: Your Enforcement Authority

WorkSafe WA is the designated regulatory and enforcement body responsible for falls management across Western Australian workplaces. Working at heights is formally identified as one of WorkSafe WA's six key priority areas, reflecting just how significant fall-related incidents remain as a source of serious injury and fatality in this state. PCBUs can access current guidance on managing the risk of falls at workplaces directly through the WorkSafe WA website, and this should be your first reference point when developing or reviewing your fall risk management systems. Relying on guidance from interstate regulators or generic online resources is not an adequate substitute for engaging with WA's own authoritative material.

PCBU Duties: Who Is Responsible and What Does Duty of Care Actually Mean

Understanding who holds legal responsibility on a worksite is one of the most misunderstood areas of safety law in Australia. The term PCBU (Person Conducting a Business or Undertaking) was deliberately chosen under the Work Health and Safety Act 2020 (WA) to cast a wider net than the old concept of "employer." A PCBU can be an individual, a company, a principal contractor, a host employer, or a subcontractor. What makes this particularly significant is that multiple PCBUs can hold simultaneous and overlapping duties on the same worksite at the same time. If a principal contractor engages a subcontractor to perform height work, both parties carry legal obligations. Neither can point to the other as the sole responsible party.

Your Duty Cannot Be Contracted Away

This is the point that catches many businesses off guard. Under the WA WHS Act 2020, the primary duty of care is non-transferable. Engaging a subcontractor to carry out work at height does not extinguish your obligations as the principal PCBU. It does not matter how the contract is worded or what indemnity clauses are included. The law holds you responsible for ensuring the work is carried out safely, regardless of which entity is physically on the tools. The introduction of industrial manslaughter as a criminal offence under the WHS Act 2020 reinforces exactly how seriously the legislature treats this responsibility, with penalties of up to $10 million for a body corporate.

Training Is a Legal Requirement, Full Stop

Regulation 39 of the Model WHS Regulations, adopted in Western Australia, requires PCBUs to ensure workers receive adequate information, training, and instruction to carry out their work safely. This is not a best-practice recommendation. It is a regulatory obligation. In the context of working at heights, this means ensuring workers are trained to a recognised competency standard, that training is current, and that evidence of that training is documented and accessible. The WorkSafe WA guidance on rights and responsibilities makes clear that both PCBUs and workers carry defined legal responsibilities, and the absence of documented, current training is a direct legal exposure point.

Active Due Diligence Versus Passive Assumption

Supervisors and managers often believe that issuing a training certificate or conducting a pre-start toolbox talk satisfies their due diligence obligations. It does not. Due diligence under the WHS Act requires officers to actively demonstrate that safety obligations are being met. In practice, this means documenting risk assessments, verifying that training certifications are current before each task, maintaining supervision records, and confirming that the hierarchy of controls has been applied before fall arrest equipment is even considered.

Why a Lapsed Certificate Is Not a Legal Defence

If an incident occurs and the injured worker's training certificate is three or four years old, a court will scrutinise whether the PCBU took all reasonably practicable steps to maintain competency. The certificate alone does not demonstrate ongoing compliance. Courts look for evidence that the PCBU actively monitored training currency, scheduled refresher training, and supervised the work in practice. The industry-standard refresher cycle recommended by the Working at Heights Association (WAHA) and required by most Tier 1 construction sites and mining operations is every two years. Holding a certificate from five years ago, with no refresher and no supervisory records, is unlikely to satisfy a court that a PCBU met their duty of care.

The Hierarchy of Controls for Working at Heights

Under Australian WHS law, the Hierarchy of Controls is not a suggestion or a best-practice guideline. It is the legally recognised framework that every PCBU must apply when managing the risk of falls in the workplace. The hierarchy operates in strict order, and that order matters enormously from a compliance perspective.

Elimination comes first. Can the task be performed at ground level? Can the work be redesigned so that height access is not required at all? If elimination is reasonably practicable, it must be explored before any other control is considered. Only after elimination has been genuinely assessed and ruled out can you move to the next level.

From there, the hierarchy moves through passive fall prevention (guardrails, scaffolding, and elevated work platforms), then work positioning systems such as rope access and travel restraint, and finally fall arrest systems such as harnesses and lanyards as a last resort only. The reason passive controls sit so much higher in the hierarchy than personal protective equipment is straightforward: guardrails and scaffolding protect everyone in the area without relying on any individual worker to behave correctly or fit their equipment properly. A harness only works if it is worn, fitted correctly, connected to a certified anchor point, and used as intended every single time. Passive controls remove those variables entirely.

There is also a critical physical reality that shapes how the hierarchy is applied on site. The 2012 Model Code of Practice for Managing the Risk of Falls established that a falling person can travel up to 6.5 metres before arrest under a fall-arrest system. In practical terms, this means that in many single-storey buildings and low-clearance work environments, there simply is not enough clearance for a fall-arrest system to function safely before the worker contacts a lower surface. This is one of the strongest arguments for prioritising passive controls wherever they are reasonably practicable.

The hierarchy must also be applied in order and documented. This is where many organisations fall short. Choosing fall arrest as your primary control without recording why elimination, passive prevention, and work positioning were not reasonably practicable is a potential compliance failure under the WA WHS Act 2020. WorkSafe WA expects PCBUs to demonstrate that decision-making process, not just implement a control.

In 2026, best-practice organisations are moving toward layered, risk-based approaches that combine documented Safe Work Method Statements, site-specific controls, active supervision, and regular competency-based training. Relying on a single control measure, or treating a SWMS as a paperwork exercise rather than a live working document, is no longer acceptable practice on compliant Western Australian worksites.

Safe Work Method Statements: When Are They Required in WA?

A Safe Work Method Statement (SWMS) is a written document that identifies high-risk construction work activities, the hazards those activities create, and the specific control measures that will be applied to manage those risks. In Western Australia, the obligation to prepare a SWMS is not optional and it is not something you complete after work begins. Under the Work Health and Safety (General) Regulations 2022 (WA), a SWMS must be prepared before any high-risk construction work commences on site. This is a hard legal requirement, and the PCBU responsible for carrying out the work holds primary responsibility for ensuring it is in place.

When Does the SWMS Obligation Kick In for Height Work?

For working at heights specifically, the legal trigger in WA is clear. Regulation 291 of the WA WHS Regulations requires a SWMS for any task that involves a risk of a person falling more than 2 metres on a construction site. This captures a wide range of common construction activities, including work from scaffolding, elevated work platforms, rooftops, and any structure where a fall from that height is reasonably foreseeable. It is worth noting that Regulation 79 also requires risk controls for any fall risk, regardless of height, meaning sub-2-metre tasks still demand active risk management even if they do not formally trigger the SWMS obligation.

The WorkSafe WA information sheet on SWMS for high-risk construction work confirms that the PCBU must prepare the SWMS in consultation with the workers who will directly carry out the task. A principal contractor must also obtain a copy of the SWMS before high-risk construction work begins on their project. Worker involvement in the development process is not just good practice; it is a regulatory expectation that directly improves the practical accuracy of the document.

What About the SA Threshold Change?

You may have come across recent news about South Australia lowering its mandatory SWMS and fall-prevention trigger from 3 metres to 2 metres, effective 1 July 2026, under the Work Health and Safety (High Risk Construction Work) Amendment Regulations 2025. This is an SA-specific regulatory change confirmed by SafeWork SA and it does not alter current WA law. WA already operates on a 2-metre trigger for construction work, so the practical implication for WA employers is limited. However, the SA change does reflect a clear national trend toward tighter harmonisation across jurisdictions, and it reinforces why treating 2 metres as the meaningful threshold makes sense regardless of where you operate.

What Must a Compliant SWMS Actually Contain?

A compliant SWMS is more than a checklist. It needs to clearly describe each high-risk activity being performed, identify the specific hazards involved including fall risks, unstable surfaces, equipment failure, and adverse weather conditions, and then document the control measures that will be applied in line with the Hierarchy of Controls. Responsibilities for implementing each control must be assigned to named roles such as supervisors, workers, or safety officers. The document also needs a review and update process; if site conditions change, new equipment is introduced, or a safety incident or near-miss occurs, the SWMS must be revisited before work continues.

For WA employers working outside formal construction settings such as manufacturing or warehousing, the mandatory SWMS obligation does not technically apply, but the broader duty under the WHS Act to manage fall risks remains. In those environments, documented risk assessments and equivalent written controls are still expected and represent sound compliance practice. Treating any task at 2 metres or above as requiring a formal written risk management process is the safest and most defensible position your organisation can take.

Training Requirements: RIIWHS204E and What Employers Need to Know

When it comes to working at heights in Australia, training is not optional and it is not a box-ticking exercise. It is a legal obligation, and the qualification that sits at the centre of that obligation is RIIWHS204E: Work Safely at Heights.

What RIIWHS204E Actually Covers

RIIWHS204E is the nationally recognised unit of competency for workers performing tasks at height across Australia. It sits within the RII Resources and Infrastructure Industry Training Package and was updated to its current version in September 2020, superseding the previous RIIWHS204D. The unit covers five core elements: identifying work requirements (including hazard identification and legislative compliance), identifying work procedures, accessing and installing fall-protection equipment, performing work at heights while monitoring risk controls, and cleaning up the work area safely. Practical assessment requires participants to complete a Safe Work Method Statement, select and correctly fit a full body harness, perform pre-use inspections, rig anchorage straps, and demonstrate correct use of a twin tail lanyard. It is a one-day course delivered with a maximum trainer-to-student ratio of 10 to 1, and participants receive a Statement of Attainment on successful completion.

Who Needs to Be Trained

A common misconception is that working at heights training only applies to the person physically wearing the harness. Australian Standard AS/NZS 1891.4 goes considerably further than that. The standard mandates that operators using industrial fall-arrest systems must be trained and assessed for competency. The 2009 update to that standard extended the training obligation beyond equipment operators to cover, in the standard's own language, "all people who are influential in height safety issues." That includes supervisors, managers, and even procurement staff who specify or purchase height-safety equipment. If your role has any influence over how height work is planned, managed, or resourced, training is relevant to you.

Refresher Training and Site Access Requirements

Holding a Statement of Attainment is not a lifetime pass. The industry-standard refresher cycle is every two years, a position explicitly recommended by the Working at Heights Association (WAHA). In practice, most Tier 1 construction sites and mining operations across WA now require current evidence of refresher training as a condition of site access, meaning a certificate that is several years old may see a worker turned away at the gate before the legal consequences even come into play.

The Legal Risk of a Lapsed Certificate

This point is worth stating plainly. A lapsed certificate is not a legal defence. Under Regulation 39 of the Work Health and Safety Regulations 2017 (WA), a PCBU must ensure that workers receive adequate information, training, and instruction to work safely. If a serious incident occurs and a worker's RIIWHS204E certificate is four or five years old, a regulator or court is very likely to find that the PCBU failed that duty. The certificate's existence is not the issue; its currency is.

Safety Heights and Rescue Training delivers RIIWHS204E: Work Safely at Heights from its facility in Naval Base, Perth. The course is nationally recognised and built specifically for workers, supervisors, and safety personnel in high-risk WA industries including construction, mining, and shutdown maintenance, the sectors where compliance gaps carry the greatest consequences.

Working at Heights in WA's Mining and Resources Sector

WA's resources sector adds a layer of regulatory complexity that workers and PCBUs in other industries simply do not encounter. While the Work Health and Safety Act 2020 (WA) now serves as the primary legislative framework across the state, the Work Health and Safety (Mines) Regulations 2022%20Regulations%202022%20-%20[00-a0-01].pdf?OpenElement=) establish a separate compliance pathway specifically for mining operations. PCBUs whose operations span both general industrial and mining environments need to be clear on which regulatory instrument applies to each part of their work. Getting that wrong is not a minor administrative issue; it is a potential failure of the primary duty of care.

The Naval Base and Kwinana Industrial Corridor

For workers in WA's Naval Base and Kwinana industrial corridor, working at height is a routine part of the job rather than an occasional task. Shutdown and maintenance operations on vessels, refinery structures, processing infrastructure, and elevated platform systems all involve significant height hazards, often in confined or awkward configurations that make standard fall prevention controls harder to implement. Workers in this corridor regularly transition between maritime, petrochemical, and industrial environments within a single shift, meaning the nature of the height hazard changes constantly. A risk-based approach is not just good practice here; it is a practical necessity.

Site-Specific Competency Goes Beyond the Certificate

Holding a current RIIWHS204E Work Safely at Heights certificate is the baseline, but on most mining and resources sites in WA, it is not enough on its own. Sites in this sector routinely require workers to undergo site-specific competency verification before being granted access to height work areas. That verification typically covers familiarity with the site's anchor systems, the specific fall arrest equipment in use, emergency response plans, and evacuation procedures relevant to that site's configuration. Workers who arrive with a certificate but have never been assessed against the actual conditions on site represent a gap in the PCBU's duty of care obligations.

The 2 to 3 Metre Risk That Gets Overlooked

Falls from height remain one of the leading causes of serious injury in Australian workplaces, and the data consistently shows that many serious incidents occur in the 2 to 3 metre range. This is an important point for anyone who still thinks of height safety as primarily a concern for work at significant elevation. Under WA's WHS legislation, the obligation to manage fall risks applies wherever a fall is reasonably likely to cause injury, regardless of the exact height involved. The 2-metre SWMS trigger is a documentation threshold, not a signal that falls below that height are acceptable.

Rescue Planning Is a Regulatory Obligation, Not an Afterthought

Regulation 80 of the WHS (General) Regulations 2022 is direct: a rescue plan must be documented and confirmed before work at height commences. On high-risk resources sites, that means nominated workers need to hold relevant rescue competencies, whether that is tower rescue, rope rescue, or another qualification appropriate to the site configuration. The 20-minute rescue deployment benchmark referenced in industry standards exists because of the genuine physiological risk posed by suspension trauma following a fall arrest event. Pre-planned rescue is a legal requirement precisely because reactive rescue is often too slow to prevent serious harm.

How Working at Heights Intersects with Confined Space and Rope Rescue Work

In WA's industrial and resources sectors, high-risk tasks rarely come with a single set of regulatory obligations. It is common for a job to trigger multiple, concurrent legal requirements at the same time, and that overlap is where compliance gets complicated.

Consider a worker carrying out maintenance on top of a large storage vessel that also requires internal inspection. The moment that worker steps onto the exterior of that vessel at height, the fall prevention obligations under Part 4.2 of the Work Health and Safety (General) Regulations 2022 (WA) are activated. Simultaneously, if anyone is entering the vessel interior, Part 4.3 kicks in, requiring a confined space entry permit, atmospheric testing, and standby rescue arrangements. Both sets of obligations exist at the same time, on the same job, and neither can be set aside to make room for the other. A SWMS that only addresses the height component, without accounting for the confined space requirements, is incomplete and legally insufficient.

Rescue planning adds another layer of obligation that many organisations underestimate. Under WHS law, if a fall-arrest system is being used, emergency and rescue procedures must be in place and tested before work commences. This is not a formality; it is a hard legal requirement. The rescue plan must specifically account for how an incapacitated or suspended worker will be retrieved, and that retrieval will almost certainly need to happen at height. That means the rescuers themselves are subject to height safety controls, requiring their own anchor points, fall protection, and demonstrated rope rescue competency. Suspension trauma is a critical consideration here, as a worker suspended in a harness after a fall can lose consciousness within minutes, making the speed and technical quality of the rescue response a genuine life-or-death factor.

Treating each of these regulatory streams in isolation creates dangerous gaps. Integrated training that addresses working at heights, confined space entry, and tower and rope rescue together reflects how these hazards actually present in the field.

Safe Work Australia's working at heights guidance provides a useful reference point for understanding the baseline obligations, and the Working at Heights Association's standards overview clarifies which Australian Standards carry legal force when referenced by WHS legislation.

Safety Heights and Rescue Training delivers nationally recognised courses across all three of these disciplines, including Working at Heights, Confined Space, and Tower and Rope Rescue, from our Naval Base facility in Perth. Our courses are structured for the integrated hazard environments that workers across WA's resources, maritime, and heavy industry sectors face every day.

Common Working at Heights Compliance Mistakes WA Employers Make

Even experienced WA employers can find themselves on the wrong side of working at heights regulations, often without realising it. These are the five compliance mistakes WorkSafe WA sees most frequently, and each one carries real legal consequences under the Work Health and Safety Act 2020 (WA).

Mistake 1: Treating 2 Metres as the Magic Number

The 2-metre threshold appears in specific contexts, such as triggering SWMS requirements for high-risk construction work, but it does not define the outer boundary of a PCBU's duty. Under WA's risk-based framework, you must manage any fall risk that is reasonably likely to cause injury, full stop. A worker falling one metre onto a concrete floor can suffer fatal head trauma. Research into human factors at heights confirms that employers must follow safety regulations regardless of the height involved, because human factors compound risk at any elevation. If the fall could injure someone, the legal obligation to manage that risk is already active.

Mistake 2: Letting Training Certificates Go Stale

A working at heights certificate does not provide indefinite compliance cover. The industry-standard refresher cycle is every two years, and certificate currency is one of the first things a court examines when assessing whether a PCBU met their obligations under Regulation 39 of the Work Health and Safety (General) Regulations 2022 (WA). If a worker is injured and their certificate is four years old with no refresher on record, that gap becomes a significant liability. Training is not a one-time administrative task; it is an ongoing obligation.

Mistake 3: Using a Generic SWMS

Submitting a generic, off-the-shelf SWMS for high-risk construction work is not compliance; it is a document that creates a false sense of security. A valid SWMS must identify the specific task, the specific hazards present at that particular worksite, and the controls selected to address them. It must be completed before work commences and reviewed with workers on site. A template downloaded from the internet and filed without modification will not satisfy WA's regulatory requirements and will not protect you if something goes wrong.

Mistake 4: Forgetting Supervisors and Managers

AS/NZS 1891.4 is explicit: training obligations extend beyond the workers physically wearing a harness. Anyone influential in height safety decisions, including supervisors, managers, and safety coordinators, must be competent in height safety matters. A supervisor who cannot identify an incorrectly rigged harness or an inadequate anchor point cannot meaningfully fulfil their oversight role. Leaving this group untrained is a compliance gap that regulators and courts will notice.

Mistake 5: Defaulting Straight to Fall Arrest

Reaching for a harness and lanyard as the default solution is one of the most common hierarchy of controls failures in WA workplaces. Fall arrest sits at the bottom of the hierarchy; it is a last resort, not a first response. Before selecting fall arrest as the primary control, a PCBU must genuinely consider and document why higher-order controls such as guardrails, scaffolding, or elevated work platforms were not reasonably practicable. Without that documented reasoning, fitness-for-work and control-selection decisions lack the evidentiary foundation regulators expect, and legal exposure increases substantially if an incident occurs.

What WA Employers and Workers Should Do Right Now

If your team is working at height anywhere in WA, here are four concrete actions to take before the next high-risk task begins.

Review every SWMS covering tasks at 2 metres or above. A generic template lifted from the internet will not protect you in a WorkSafe WA investigation. Your SWMS must reflect actual site conditions, identify the specific hazards present, and sequence your control measures in strict hierarchy order, starting with elimination and working down to PPE only where higher-order controls are not reasonably practicable. If your documents do not reflect what is actually happening on the ground, update them now.

Audit training records across your entire workforce, including supervisors and managers. If any RIIWHS204E certificates are more than two years old, schedule a refresher before work recommences. Courts have found PCBUs negligent when workers involved in incidents held lapsed certifications, and WorkSafe WA takes the same view.

Confirm your emergency response and rescue plan is current. Nominated rescue workers must hold relevant, up-to-date competencies. Where rope access or tower rescue is involved, that competency must be specific to those tasks.

Contact Safety Heights and Rescue Training to discuss RIIWHS204E training, refresher courses, or multi-discipline packages tailored to your Perth or WA-based team. We are based in Naval Base and deliver nationally recognised training across high-risk industries throughout Western Australia.

Conclusion

Working at heights doesn't have to be a legal minefield. By understanding your obligations under WA's Work Health and Safety Act, applying a structured risk assessment process, and ensuring your team holds current training and documentation, you create a workplace where compliance and safety go hand in hand.

The key takeaways are simple: know the laws that apply to your industry, control height-related hazards before work begins, keep your records current, and never treat elevated work as routine.

Now it's time to act. Review your current safety procedures against the regulations outlined in this guide. Identify any gaps, update your documentation, and invest in proper training for your team.

Every worker who goes home safely at the end of the day is proof that getting this right matters. Start today, because no deadline or project is worth a life.