Scaffolding safety: OSHA Subpart L essentials

Scaffolding appears year after year on OSHA's most-cited list, and scaffold incidents cause a large number of construction injuries and deaths. OSHA's scaffolding standard, 29 CFR 1926 Subpart L, sets the rules, and most violations come down to a handful of basics.

The competent person

A qualified person must design the scaffold (29 CFR 1926.451(a)(6)). A competent person supervises and directs its erection, moving, alteration and dismantling (1926.451(f)(7)) and inspects the scaffold before each work shift and after anything that could affect its integrity (1926.451(f)(3)). The roles are distinct: “competent” has a specific OSHA meaning (able to identify hazards and authorized to correct them), while scaffold design is a qualified person’s duty.

Capacity, platforms and access

Scaffolds must support their own weight plus at least four times the intended load; platforms must be fully planked; and safe access, a ladder or stair tower, not climbing cross-braces, must be provided. Guardrails and/or personal fall arrest are required for work above 10 feet.

Inspect and record

A pre-shift inspection by the competent person, recorded, plus training for everyone who works on or around the scaffold, is what turns Subpart L from a citation risk into a routine that protects the crew. For the routine detail, see our guides to before-shift scaffold inspections, re-inspecting a scaffold after a storm, and who needs scaffold training.