Under federal OSHA's construction standard, 29 CFR 1926.501, at what height above a lower level does fall protection generally become required?

Explanation

Federal OSHA sets the general construction fall-protection trigger at 6 feet above a lower level (a). California does not use that number: 8 CCR §1670(a) requires an approved personal fall arrest, fall restraint or positioning system where an employee is exposed to falling in excess of 7 1/2 feet in general construction, and roofing operations are routed instead to §1730, which triggers above 20 feet on a low-slope roof. Six feet does appear in California, but only for residential-type framing under §1716.2(e)(1). (b) 10 feet is the federal scaffold trigger in 1926.451(g)(1), (c) 4 feet is the federal general-industry figure in 1910.28, and (d) 15 feet is the steel-erection figure in 1926.760.