Field Story · Fall Protection

The Anchor Point That Wasn't Rated for the Job

A roofing contractor clipped his fall arrest lanyard to a convenient pipe run instead of an engineered anchor point. When he slipped, the system arrested his fall – but the anchor deformed under load and the extra clearance let him strike a lower ledge before coming to rest. He escaped with a minor injury instead of a fatality, but only because the total fall distance happened to be short enough. This composite case study illustrates one of the most common and most dangerous shortcuts in work-at-height safety: trusting an anchor point that was never assessed for the job.

The Situation

The contractor was working near a roof edge, connected to a full body harness with a fixed-length lanyard. Rather than walking to the nearest certified anchor point, which was slightly out of reach for the task, he clipped onto a nearby pipe support that looked sturdy enough to hold his weight under normal conditions. When his foot slipped on a wet section of roof, the fall arrest system activated as designed – but the pipe support partially bent under the dynamic load, adding unplanned slack to the system.

Because no one had calculated the total fall clearance required for that connection point, the extra deflection was enough for him to make contact with a lower roof ledge before the system fully arrested his fall. He suffered a minor leg injury and was able to be assisted down without a rescue operation, but the margin between this outcome and a much worse one was extremely thin.

What Went Wrong

Two failures combined here. First, the anchor point used was never assessed or rated as an anchor device – it was simply convenient. Anchor devices intended for fall arrest need to meet defined strength and design requirements, and an ordinary pipe support has no guarantee of meeting them. Second, no fall clearance calculation had been done for the task, so no one had confirmed there was enough vertical space below the connection point to accommodate lanyard extension, harness stretch and any anchor deflection before a lower obstruction was reached.

The Lesson

Always verify that an anchor point is actually rated for fall arrest, and calculate the required fall clearance before connecting – convenience is not a safety rating. A fall arrest system is only as reliable as its weakest link, and an unrated anchor point can undo the protection offered by an otherwise correctly worn harness.

Standards and Rules That Apply

EN 795 – Anchor Devices: sets requirements for the anchor points that fall arrest systems are connected to – the standard the pipe support in this case study was never assessed against.
EN 361 – Full Body Harnesses: governs the harness worn by the contractor, which performed as intended despite the anchor failure.
EN 360 – Retractable Fall Arresters: a self-retracting lifeline would have minimised slack and reduced the total fall distance compared with the fixed lanyard used here.
EN 341 – Descender Devices for Rescue: relevant to the rescue plan that should accompany any work-at-height task, in case a suspended worker needs controlled lowering after an arrest.

Prevention Checklist

Tag and certify every anchor point used for fall arrest, and treat anything untagged as unsuitable for connection.
Calculate required fall clearance for the specific anchor height, lanyard type and worker weight before starting the task.
Prefer self-retracting lifelines (EN 360) over fixed lanyards where the anchor geometry allows, to reduce total fall distance.
Never substitute structural components such as pipes, railings or ductwork for a purpose-built anchor device.
Confirm a rescue plan is in place before connecting, so a suspended worker can be brought down quickly after any arrest.

Frequently Asked Questions

Why did the anchor point fail if the harness worked correctly?
Because the harness and the anchor point are two separate parts of the same system. EN 361 governs the harness itself, but the connection point it is clipped to must independently meet EN 795 anchor device requirements – a strong harness cannot compensate for a weak anchor.

What is a fall clearance calculation?
It is the process of confirming there is enough vertical space below a connection point to accommodate the lanyard's free fall distance, the deployment of any energy absorber, harness stretch and anchor deflection, before the worker could strike a lower surface.

Is a self-retracting lifeline always safer than a lanyard?
It generally reduces free fall distance and arrest forces compared with a fixed-length lanyard, but it still requires a properly rated anchor point (EN 795) to be effective – it does not remove the need for anchor assessment.

Can everyday structural elements like pipework ever be used as anchors?
Only if they have been formally assessed and certified as meeting anchor device requirements for the loads involved. Without that assessment, they should never be assumed suitable, regardless of how sturdy they appear.

What should happen to an anchor point after it deforms in an arrest like this?
It must be taken out of service immediately and inspected or replaced. A deformed anchor should never be reused, and the incident should trigger a review of every similar improvised connection point on site.

The Anchor Point That Was Not Rated for the Job – Field Story