Scaffold Inspection Requirements and Checklist

What OSHA requires

The inspection rule is one sentence in 29 CFR 1926.451(f)(3): scaffolds and scaffold components must be inspected for visible defects by a competent person before each work shift, and after any occurrence that could affect the structural integrity of the scaffold. Everything else in this guide is the practical detail of doing that well.

Two things follow from the wording. First, the inspection is per shift, not per day or per week. A scaffold that is used by a day crew and a night crew is inspected twice. Second, "any occurrence" is broad on purpose: a storm, a forklift bump, a delivery landed on the platform, a modification by another trade, or a long idle period all count. When in doubt, inspect again.

Suspended scaffolds carry an extra rule. Under 1926.451(d)(10), the ropes on a suspension scaffold must be inspected for defects by a competent person before each shift and after any occurrence that could affect them. That includes checking for kinks, broken wires, corrosion, heat damage and evidence of contact with anything abrasive or chemical.

Who is allowed to inspect

Only a competent person may perform the inspection. OSHA defines one in 1926.450(b) as someone capable of identifying existing and predictable hazards and who has the authority to take prompt corrective measures. The second half matters as much as the first: a person who can spot a missing tie but has to wait for someone else's permission to stop work is not a competent person in OSHA's sense.

The competent person does not have to be the scaffold erector, and on most jobs is not. A general contractor's superintendent, a safety manager or a lead hand can fill the role, provided they have been trained under 1926.454(b) in the hazards of the scaffold type in use. A supplier's erection crew hands the scaffold over; the user's competent person inspects it every shift after that. Our guide to competent person and training requirements covers what that training looks like.

OSHA does not require a written record of the shift inspection. Almost every general contractor and plant owner does, and the industry's answer is the scaffold tag, signed and dated at each access point.

The pre-shift inspection checklist

The list below follows the order a competent person naturally walks a supported scaffold: from the ground up, then along the platform, then the things that can reach it. Each line names the paragraph of Subpart L behind it so a finding can be written up precisely.

1. Foundation and base

• Base plates and mud sills under every leg, bearing on firm, level ground that has not settled or washed out (1926.451(c)(2))
• No barrels, boxes, loose brick, blocks or other unstable objects used as supports (1926.451(c)(2)(ii))
• Screw jacks within their working range; casters locked on mobile units (1926.452(w))
• Ground conditions unchanged since the last shift: no new excavation, standing water or heavy equipment traffic close to the legs

2. Structure

• All frames, uprights, bearers, runners and braces present, straight and undamaged; no bent, cracked, split or heavily corroded members (1926.451(f)(4))
• Cross braces, coupling pins and locking devices in place; frames pinned where uplift is possible (1926.452(c))
• Ties, guys or bracing installed as soon as the scaffold passed a 4:1 height-to-base ratio, then every 20 ft vertically for scaffolds 3 ft wide or less (26 ft when wider) and every 30 ft horizontally (1926.451(c)(1))
• Components from different manufacturers are not mixed unless they fit without force and a competent person has judged the assembly sound (1926.451(b)(10))
• Scaffold is plumb, level and square; no leaning, racking or visible movement

3. Platforms and planking

• Every working level fully planked or decked between the uprights and the guardrail supports, with gaps no wider than 1 inch (1926.451(b)(1))
• Platforms at least 18 inches wide and no more than 14 inches from the face of the work, or fall protection provided (1926.451(b)(2), (b)(3))
• Planks extend 6 to 12 inches past their supports (up to 18 inches on platforms longer than 10 ft) or are cleated or hooked; overlaps at least 12 inches over a support (1926.451(b)(4)–(7))
• No cracked, notched, delaminated, saw-cut, painted-over or badly weathered planks; scaffold-grade lumber only (Appendix A)
• Platforms clear of debris, ice, snow, mud and stored material beyond the rated load (1926.451(f)(8), (f)(13))

4. Guardrails and falling-object protection

• Top rail between 38 and 45 inches above the platform on every open side more than 10 ft above a lower level (1926.451(g)(4))
• Midrails, screens or equivalent about halfway up; cross bracing only counts when its crossing point falls in the permitted band
• Toe boards at least 3.5 inches high where people can pass below, or debris nets, canopies or barricades in place (1926.451(h))
• No steel or plastic banding used as a rail; rope rails inspected and taut (1926.451(g)(4)(xiii))

5. Access

• A ladder, stair tower, ramp or built-in access to every platform more than 2 ft above or below the point of access; cross braces are never used to climb (1926.451(e))
• Hook-on and attachable ladders secured, bottom rung no more than 24 inches above the landing, rest platforms at the required intervals
• Access route clear of stored material and openings

6. Surroundings

• Clearance from power lines: at least 10 ft from lines up to 50 kV, more above that; 3 ft from insulated lines under 300 volts (1926.451(f)(6))
• Weather: no work in storms or high wind unless the competent person judges it safe and windscreens or personal fall arrest are in use (1926.451(f)(12))
• Nothing new overhead or nearby that could strike the scaffold: crane picks, deliveries, traffic

7. Sign-off

• Defects corrected, or the scaffold tagged out and barricaded, before anyone is allowed on it (1926.451(f)(4))
• Tag at every access point updated with the date, time and the competent person's signature
• Anything the erector needs to fix reported to them the same shift

Inspections after an occurrence

The second half of the rule is the one crews forget. A scaffold that passed at 7 a.m. is not necessarily sound at 2 p.m. Re-inspect after any of these, and treat the list as a starting point rather than a boundary:

• High wind, heavy rain, lightning, snow or ice, or a change in ground conditions from any of them
• Impact from a vehicle, forklift, crane load or falling object
• Any alteration, including another trade removing a brace, tie or plank to get access
• Material landed on the platform, especially pallets or masonry that approach the rated load
• A period out of use long enough for anything to have changed, such as a weekend on an open site

Alterations deserve a special note. Under 1926.451(f)(7), a scaffold may only be erected, moved, dismantled or altered under the supervision of a competent person, by trained employees. A plumber pulling a brace to run pipe is an unauthorized alteration, and the scaffold needs the competent person's eyes before it is used again.

Documenting the inspection

Federal OSHA does not tell you how to record a scaffold inspection, and does not strictly require you to record it at all. Two reasons to do it anyway. First, if there is an incident or a compliance officer visit, the record is the only evidence the inspection happened. Second, most owners and general contractors write a documented inspection into their site safety plan, and a subcontractor that cannot produce one is in breach of contract before OSHA is involved.

The convention is a tag at each access point (green, yellow or red) plus a log or app entry that captures the same information: scaffold identifier, location, date and time, the competent person's name, and any defects found and corrected. Photographs are cheap and settle arguments. A scaffold that fails inspection is red-tagged, its access blocked, and the erector called.

If you would rather have an outside set of eyes, several suppliers in the directory offer scaffold inspection and certification services, and our consulting practice runs independent safety and OSHA compliance audits.