29 CFR · OSHA · FMCSR · Always current
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29 CFR §1926.501 — Duty to have fall protection
§1926.501(b) — Unprotected sides and edges
Each employee on a walking/working surface with an unprotected side or edge which is 6 feet (1.8 m) or more above a lower level shall be protected from falling by the use of guardrail systems, safety net systems, or personal fall arrest systems.
Leading edges. Each employee who is constructing a leading edge 6 feet or more above lower levels shall be protected by guardrail systems, safety net systems, or personal fall arrest systems.
Exception: when the employer can demonstrate that it is infeasible or creates a greater hazard, a fall protection plan meeting §1926.502(k) may be used.
Residential construction. Each employee engaged in residential construction activities 6 feet or more above lower levels shall be protected by guardrail systems, safety net systems, or personal fall arrest systems.
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