AS/NZS 1891.4:2025 Explained: Fall Arrest Anchor Inspection Requirements

AS/NZS 1891.4:2025 sets the requirements for the selection, use, and maintenance of industrial fall arrest systems in Australia and New Zealand. Published in 2025 as an update to the 2009 edition, the standard addresses not just the hardware you clip onto, but the entire system from anchor point through to harness connection. For building owners, facilities managers, and height safety installers, the most consequential changes sit in the inspection and testing requirements for installed anchor points. Understanding what the standard now demands is not optional: under WHS Regulations across Australian jurisdictions, the PCBU has a duty to ensure plant and structures used for work at height are safe, and anchor points are plant under that framework.

The 2025 edition draws a clearer line between visual inspection, periodic inspection by a competent person, and proof load testing as a mechanical verification method. These are not interchangeable. A visual inspection can identify surface corrosion, missing components, or obvious mechanical damage. It cannot tell you whether an anchor installed into ageing concrete, a hollow masonry wall, or a precast panel is still capable of generating the load transfer required to arrest a fall. That distinction is now more explicitly embedded in the standard, and it carries direct implications for the testing intervals and documentation building owners must maintain.

What AS/NZS 1891.4:2025 Actually Covers

The standard applies to industrial fall arrest systems, which includes anchor devices, lanyards, self-retracting devices, harnesses, and connectors. Section 4 of the standard deals specifically with anchor devices and anchor systems, covering both single-point anchors and horizontal lifeline systems. The scope extends to both temporary and permanently installed anchors across all substrate types encountered in Australian construction: reinforced concrete, structural steel, precast panels, hollowcore planks, and masonry.

It is worth being precise about what AS/NZS 1891.4:2025 is and is not. It is a use and maintenance standard, not an installation design standard. The structural design of anchor systems for specific fall arrest duty falls under AS 5532:2013 (currently under revision) and references AS 5216:2021 for the design of anchor systems. AS/NZS 1891.4:2025 operates downstream of that design and installation work. Its concern is whether the installed system remains fit for purpose over time, and what a competent person must do to verify that.

The companion standard AS/NZS 1891.1 covers full body harnesses and associated connectors. Building owners managing a complete height safety programme need both documents, but for the inspection and testing of anchor hardware fixed to structure, AS/NZS 1891.4:2025 is the primary reference.

The Competent Person Requirement

One of the clearest requirements in the 2025 edition is the definition of who is qualified to carry out inspections. The standard requires that periodic inspections be conducted by a competent person, defined as someone with the knowledge, skills, and experience to assess the condition and ongoing suitability of the fall arrest system. This is not a self-assessment that a facilities manager can conduct with a checklist downloaded from a supplier's website.

In practice, a competent person for anchor inspection has formal training in height safety systems, understands anchor mechanics and substrate behaviour, and can make an informed judgement about whether an anchor showing signs of corrosion or displacement is still serviceable. For mechanical verification through proof testing, that competent person typically needs access to calibrated test equipment and an understanding of load application, displacement measurement, and failure mode interpretation.

The standard does not prescribe specific qualifications by course code, but the intent is unambiguous. When an anchor point forms part of a life safety system and is the single point of connection for a worker operating at height, the inspection must be carried out by someone who can stand behind their assessment technically. AEFAC TN05 provides useful industry guidance on competency expectations for those involved in the inspection and certification of height safety systems.

Inspection Intervals Under the 2025 Edition

AS/NZS 1891.4:2025 requires that permanently installed anchor systems be inspected at intervals not exceeding 12 months. This is a maximum interval, not a target. Where anchor points are exposed to coastal environments, industrial atmospheres, high UV, or temperature cycling, more frequent inspection is appropriate and the standard expects that the competent person will recommend intervals based on actual conditions.

The 12-month interval applies to the periodic inspection by a competent person. This is separate from the pre-use check that a worker must perform before connecting to any anchor point on any occasion. The pre-use check is the worker's responsibility and covers obvious visible damage, corrosion, loose components, and the condition of any swivel or connecting hardware. Pre-use checks do not substitute for periodic inspection, and periodic inspection does not substitute for proof load testing where testing is required.

Horizontal lifeline systems, which involve engineered cable or rail systems spanning between anchor points, carry additional complexity. The standard requires that these systems be inspected as a complete assembly, including the condition of energy absorbers, end terminations, intermediate supports, and the structural anchor points at each end. A single failed component in a horizontal lifeline renders the whole system non-functional, so the inspection must treat the system as an integrated unit rather than a collection of individual parts.

When Proof Load Testing Is Required

This is where the practical implications for building owners become most direct. Visual and tactile inspection by a competent person can confirm that an anchor is present, undamaged, and free of obvious defects. It cannot confirm that the anchor is generating the required load transfer into the substrate. That requires mechanical proof testing.

AS/NZS 1891.4:2025 does not mandate proof load testing at every annual inspection for every anchor in service. It does, however, require proof testing in the following circumstances:

• After anchor installation: : Before a newly installed or reinstalled anchor is placed into service, proof testing confirms that the installation has achieved the required load transfer. This applies to post-installed anchors including M12 and M16 sleeve anchors, chemical capsules, undercut anchors, and through-bolts.
• After any activation event: : If an anchor has arrested a fall or has been shock-loaded, it must be taken out of service and either proof tested or replaced. A loaded anchor may have moved, the substrate around it may have cracked, or the anchor body itself may have yielded.
• Where substrate condition is uncertain: : In older buildings, substrates change. Concrete carbonates, masonry deteriorates, and grout in precast connections can degrade. Where a competent person cannot confirm substrate integrity by inspection alone, proof testing is required before the anchor is returned to service.
• After structural or building works nearby: : Any drilling, cutting, or construction activity in the vicinity of anchor points may have affected the substrate or the anchor itself. Testing confirms current capacity rather than relying on historical records.
• On a risk-based periodic programme: : For anchor systems in service for extended periods, particularly those installed more than ten years ago in substrates not readily inspected, a periodic proof test programme is good practice and may be required by the asset owner's WHS management system.

Proof Load Test Parameters

For fall arrest anchors, the proof load applied during testing is typically 6 kN for a single-person anchor at a prescribed displacement limit. Under AS 5532 and the guidance referenced in AS/NZS 1891.4:2025, a compliant anchor must sustain the proof load without exceeding defined displacement thresholds and without showing signs of ongoing movement or substrate distress.

In Australian practice, the standard proof load test for a single-person fall arrest anchor applies a tensile load of 6 kN, held for a defined period (typically 60 seconds), with displacement monitored throughout. The anchor passes if it sustains the load within the displacement limit, which is generally accepted as no more than 3 mm of permanent set after load removal. A 12 kN test load is used for anchors rated for two-person use. Testing for rescue and recovery duty or for anchors on engineered horizontal lifeline systems may require 15, 18, or 21 kN depending on the design load case.

Load application must be in the critical direction for the anchor, which for fall arrest duty is typically a downward or outward pull depending on the anchor location and geometry. Testing only in a direction convenient for the test rig is not acceptable practice. The competent person conducting the test must assess the anchor's installed geometry and apply load in the direction that represents the design arrest load.

All test results must be documented in a format that records the anchor identifier, substrate type, load applied, hold duration, displacement reading before and after loading, and the assessor's determination of pass or fail. This documentation forms part of the building's height safety register and must be available for inspection by regulators and for review by any subsequent competent person.

Documentation and the Height Safety Register

AS/NZS 1891.4:2025 requires that a register be maintained for all anchor systems. The register is not simply a list of locations. It must record installation details, substrate type, anchor specification (including manufacturer, model, and diameter, such as M12 or M16), installation date, the inspection history including dates and outcomes, any proof test results, and the identity of the competent person who carried out each inspection or test.

Under WHS Regulations, the PCBU must be able to demonstrate that plant used in the workplace is safe. For anchor points, that demonstration rests on the register. A building that cannot produce a current register with inspection dates, competent person credentials, and test results is not in a defensible position if a height safety incident occurs. Safe Work Method Statements for work at height should reference the anchor point register and confirm that anchor points have been inspected within the required interval.

The 2025 edition strengthens the requirement that out-of-service anchors be physically tagged or locked out. An anchor that has failed a proof test, has been shock-loaded, or is awaiting inspection must not be accessible for connection. This is a physical control, not a paper one: a tag on a file does not prevent a worker from clipping onto a failed anchor. The anchor itself must be rendered inaccessible.

Implications for Building Owners and Facilities Managers

The transition from AS/NZS 1891.4:2009 to the 2025 edition does not give building owners a grace period to defer compliance. The 2025 edition is the current standard, and it reflects the state of practice that a competent person is expected to apply. If your building's height safety programme was designed around the 2009 edition, it needs to be reviewed against the 2025 requirements.

The practical questions to ask are straightforward. When were your anchor points last proof tested, and by whom? Does your height safety register contain the information the 2025 edition requires? Are your inspection intervals appropriate for the building's environment, age, and the substrate types your anchors are installed into? Have any anchor points been shock-loaded since installation without being subsequently tested?

For strata committees managing multi-storey buildings, these questions matter because the obligation sits with the owners corporation as the PCBU for common property. Contractors who access the roof, facade, or plant areas are relying on anchor points that the owners corporation is responsible for maintaining. The cost of an unscheduled inspection programme is minor compared to the liability exposure from an anchor failure.

Choosing a Testing Provider

Not all anchor testing providers operate with the same level of technical rigour. When engaging a provider to carry out inspections and proof load testing under AS/NZS 1891.4:2025, confirm that they use calibrated hydraulic test equipment with current calibration certificates, that their personnel can demonstrate competency in anchor mechanics and substrate assessment, and that they will provide test reports in a format that meets the documentation requirements of the standard.

Ask specifically whether they test in the critical load direction for each anchor, whether they record displacement data numerically rather than by feel, and whether their reports identify the anchor specification and substrate type for each test point. A report that records only pass or fail without underlying data is not adequate for a building register under the 2025 edition.

[Anchor Testing Australia](https://www.anchortesting.com.au) provides [proof load testing services](/services/proof-load-testing) for fall arrest anchors across all substrate types, using calibrated hydraulic test rigs and producing fully documented test reports to AS/NZS 1891.4:2025 requirements.

Conclusion

AS/NZS 1891.4:2025 raises the bar for how installed fall arrest anchors must be inspected, tested, and documented in Australia. The requirement for competent person inspection at intervals not exceeding 12 months, combined with clear triggers for proof load testing and a more demanding register format, means that many existing height safety programmes need updating. For building owners and PCBUs, the path to compliance is not complicated: audit your current register against the 2025 requirements, confirm your inspection intervals are appropriate for your specific substrates and environment, engage a technically credentialled testing provider for any proof testing that is due, and ensure that out-of-service anchors are physically locked out rather than simply noted on paper. The standard exists because anchor points are the last line of defence for workers at height. Testing them to that standard is not a cost centre; it is the minimum that duty of care requires.