OSHA requires a harness to be inspected before every use, and then publishes no measurements to inspect against — no allowable cut length, no percentage of worn webbing, no wear limit on a D-ring. What it does publish is a list of conditions. Learn that list and the inspection stops being a ritual and becomes a two-minute route around the equipment.
What the standard actually says
One sentence carries the whole duty in construction. Under 29 CFR 1926.502(d)(21), personal fall arrest systems "shall be inspected prior to each use for wear, damage and other deterioration, and defective components shall be removed from service."
General industry words it slightly differently, and the difference is worth knowing if you work under both. 1910.140(c)(18) requires inspection "before initial use during each workshift," and its list of what you are looking for adds mildew.
Neither rule sets a calendar interval, prescribes a form, or names a retention period. Neither one tells you how big a cut has to be. The threshold on any given condition comes from the manufacturer's instructions for the unit in your hands, and the periodic documented inspection most employers run on top of the pre-use check comes from those instructions and from the ANSI/ASSP Z359 code — not from Subpart M.
The list OSHA does publish
It sits in the non-mandatory guidelines at 1926 Subpart M Appendix C (g), repeated for general industry in 1910 Subpart I Appendix C (g). Any component with one of these defects must be withdrawn from service immediately, and should be tagged or marked as unusable, or destroyed.
| Condition in the standard | What you are actually looking at |
|---|---|
| Cuts, tears, abrasions | Fuzzed or furry webbing, a nick on an edge, a flattened glossy patch where the strap has run over steel. Check under the back pad and inside the leg and chest straps, where nobody looks. |
| Mold | Blotchy staining, often on a harness that lived in a wet truck box. Mildew too, if you are under 1910.140. |
| Undue stretching | A strap that has gone thin and slack in one section, or a stitch pattern pulled out of shape. Compare against the same strap on the other side of the harness. |
| Alterations or additions | Field stitching, a knot in a lanyard, a hardware part cannibalized from another unit, a name burned into the webbing. Any of these is a removal on its own. |
| Damage due to deterioration | Chalky, stiff or faded webbing from UV exposure. A harness that lives on the dash of a truck ages faster than one in a bag. |
| Contact with fire, acids or other corrosives | Glazing, melting, charring, brown discoloration, brittleness, a hard shiny area. Welding spatter is the usual culprit; battery acid and concrete cleaners are the quiet ones. |
| Distorted hooks or faulty hook springs | A snaphook gate that does not close and lock by itself, every time, without help. A bent nose or a gate that binds. |
| Tongues unfitted to the shoulder of buckles | A buckle tongue that does not seat properly or has worn a groove into the frame. |
| Loose or damaged mountings | Grommets pulling out, a D-ring pad flapping, a keeper missing, a pass-through or quick-connect buckle that has play in it. |
| Non-functioning parts | Anything that does not do its job when you work it by hand: a buckle that will not latch, a slider that will not slide, a swivel that has seized. |
| Wear or internal deterioration in the ropes | Kinks, birdcaging, broken wires in a cable, a soft spot in a rope. Open the lay and look inside where the standard allows it. |
Two things this list does not do: give you a number, and stop at the harness. It applies to every component of the system — harness, lanyard, energy absorber, lifeline, connectors. Our harness and lanyard inspection form turns it into 34 checkpoints with the paragraph each one comes from, and prints blank for the gang box.
A route around the harness that catches all of it
Do it the same way every time and you stop skipping the same strap every time. Start with the tag, finish with the connector.
- Labels. Manufacturer, model, serial number, date of manufacture and the standards the unit is built to, all present and legible. If you cannot read them, the unit cannot be identified, traced or checked against its own manual — and it comes out.
- The manual's dates. Inside the manufacturer's stated service life, with the periodic inspection not overdue.
- Webbing, hand over hand. Bend each strap into an inverted U every six inches or so: damaged fibers stand up where flat webbing hides them. Both sides, full length, including under the back pad and inside the leg and chest straps.
- Stitching. Every load-bearing stitch pattern complete. Broken, cut or burnt stitches are the earliest visible sign that a harness has been shock loaded.
- Hardware. D-rings, buckles, grommets, keepers. No distortion, no cracks, no sharp edges, no corrosion, and everything moves and latches as designed. The dorsal D-ring belongs in the center of the back near shoulder level — 1926.502(d)(17).
- Fit. Not a defect check, but do it anyway. A loose harness lets the D-ring slide and moves your body further in a fall.
Two minutes, at the gang box, before it goes on. The version done at height with gloves on is the one that misses things.
Lanyard, energy absorber and SRL
The harness gets the attention; the connecting subsystem does the work. Under 1926.502(d)(9), lanyards and vertical lifelines must have a minimum breaking strength of 5,000 lb, and (d)(11) requires lifelines to be protected against being cut or abraded wherever they pass an edge.
- The energy absorber pack must be intact — cover closed and undamaged, no partial deployment, no torn or exposed tear stitching. A pack that has started to open has already been loaded.
- A self-retracting device should pay out and retract smoothly over its full length and lock up on a sharp pull. Check the housing, the fasteners and the swivel, and check whether the impact indicator has tripped.
- Rope and cable get the same treatment as webbing: kinks, birdcaging, broken wires, cuts, corrosion, soft spots.
- Rope grabs and fall arresters have to be the model the lifeline is rated for, installed in the marked orientation, and they have to lock as designed. A grab fitted upside down is a common and entirely silent failure.
Connectors are their own paragraph in the standard: 1926.502(d)(5) requires snaphooks to be a locking type designed to prevent disengagement, and (d)(3) sets a 5,000 lb tensile strength for dee-rings and snaphooks. On the equipment, that comes down to one test — does the gate close and lock by itself, every single time you let go of it.
After a fall, the equipment is evidence
This is the one question to ask before you look at anything else: has this equipment arrested a fall, or taken any other impact load?
1926.502(d)(19) requires personal fall arrest systems and components subjected to impact loading to be immediately removed from service, and they may not be used again for employee protection until inspected and determined by a competent person to be undamaged and suitable for reuse. 1910.140(c)(17) says the same for general industry.
In practice, most manufacturers do not permit reuse of a harness or an energy absorber that has taken a fall at all, and their instructions are the stricter rule that applies to your equipment. A dropped lanyard that fell twenty feet to a slab has also been impact loaded, and so has a harness a hoist was rigged from — 1926.502(d)(18) prohibits using this equipment to hoist materials in the first place.
Writing it down, even though OSHA does not ask you to
Subpart M prescribes no inspection form and no retention period. What it requires is that the inspection happens and that defective components leave service. A record is simply how an employer shows both, and on a site where several people share a harness locker it is the only way anyone can tell which unit was checked and which one is the unit with the cut strap.
Keep it short: serial number, date, who inspected it, pass or remove, and one line on what was found. Log the removals in the same place — a defective harness that disappears without a record has a habit of reappearing. The inspection form generator produces exactly that on Letter paper, with an equipment log and a removal-from-service block, and nothing you type leaves your browser.
While you are documenting equipment, the other half of the system is the clearance underneath it. A harness in perfect condition arrests nothing useful if there is not enough room below the anchorage — the fall clearance calculator checks that in about the same two minutes.
Bottom line
- Before every use in construction — 1926.502(d)(21). Before initial use each workshift in general industry — 1910.140(c)(18).
- OSHA gives you a list of conditions, not measurements. The accept-or-reject threshold is the manufacturer's.
- Alterations and field repairs are defects in themselves.
- Anything impact loaded comes out immediately and stays out until a competent person clears it — and most manufacturers never do.
- A failed unit gets tagged as unusable or destroyed, not hung back on the rack.