29 CFR 1926.501(b)(1): Each employee on a walking/working surface (horizontal and vertical) 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: 1926.501(b)(2). Hoist areas: 1926.501(b)(3). Holes: 1926.501(b)(4) — covers including floor holes, skylight openings. Formwork and reinforcing steel: 1926.501(b)(5). Ramps, runways, walkways: 1926.501(b)(6). Excavations: 1926.501(b)(7). Dangerous equipment: 1926.501(b)(8). Overhand bricklaying: 1926.501(b)(9). Roofing on low-slope roofs: 1926.501(b)(10). Steep roofs: 1926.501(b)(11). Precast concrete: 1926.501(b)(12). Wall openings: 1926.501(b)(14). Falls are the #1 cause of construction fatalities — 395 of 1,069 construction deaths in 2022 (36.3%).