Hazards: Falls from the platform or during erection · Collapse from overloading or bad footing · Struck-by falling tools and material · Contact with overhead power lines
Why it matters
Scaffolding, 29 CFR 1926.451, was the sixth most cited OSHA standard in fiscal year 2025, and it is still killing people: scaffolds and staging were the primary source of 51 fatal falls, slips and trips in construction in 2022, up from 49 in 2021 (BLS Census of Fatal Occupational Injuries, in CPWR's March 2024 Data Bulletin). Almost none involve an exotic failure — a missing plank, a base plate on a block, a guardrail taken down "for a minute," a worker on the braces.
Key points
- Fall protection above 10 feet — not 6 — and the system depends on the scaffold type. 1926.451(g)(1).
- The competent person owns it. Inspection for visible defects before each work shift — (f)(3) — and no erecting, moving, altering or dismantling except under their direction — (f)(7). Pulling a plank counts.
- Fully planked, gaps under 1 inch, 14 inches from the work. Platforms at least 18 inches wide, front edge within 14 inches of the work face unless guarded. (b)(1)-(b)(3).
- Firm footing below, tied above. Base plates and mud sills on level, sound footing — (c)(2); guyed or braced above a 4:1 ratio — (c)(1); 4 times the intended load — (a)(1). Blocks are not a foundation.
- Crossbraces are not a ladder. Safe access required above 2 feet, and (e)(1) says crossbraces shall not be used as a means of access.
- Mind the wires and what drops. 10 feet from lines up to 50 kV, 3 feet from insulated lines under 300 V — (f)(6); below, hard hats plus toeboards, screens or guardrails — (h).
Do / Don't
Do
- Check the tag and ask who inspected it this shift.
- Walk the deck before you load it: planks, guardrails, midrails, toeboards.
- Use the ladder or stair tower, both hands free, tools hoisted.
- Report a missing plank or loose brace to the competent person right away.
Don't
- Don't remove a guardrail, plank or tie — that is an alteration, and not yours to make.
- Don't climb crossbraces, or stand on a bucket, box or ladder on the platform.
- Don't shim legs with scrap, stockpile the deck, or work up there in high wind.
Quick site check
- Nearest scaffold: fully planked, every gap under an inch?
- The legs: base plates and mud sills on level, sound footing — or blocks?
- Access and overhead: a ladder or stair, nobody on the braces, clearance to the lines?
Discussion — ask the crew
- Who is our competent person for scaffolds, and when did they last inspect this one?
- Where is a platform missing a plank, or set more than 14 inches off the work?
- What do we do if the scaffold tag is missing?
- How are we getting up — and is anyone climbing the crossbraces?
Refs: 29 CFR 1926.451 — Scaffolds, general requirements · 29 CFR 1926.454 — Scaffold training requirements · OSHA — Top 10 Most Frequently Cited Standards, FY 2025 · CPWR Data Bulletin, March 2024 — Fatal and Nonfatal Falls in Construction, 2011-2022 (BLS CFOI)Sign-in sheet included in the printed version