Under Cal/OSHA fall protection requirements, at what height must personal fall arrest systems be used for residential construction work?
Correct Answer
D) 15 feet
Cal/OSHA Section 1637 requires fall protection for residential construction at 15 feet, which differs from the federal OSHA requirement of 6 feet, providing California contractors with more flexibility for low-rise residential work.
Why This Is the Correct Answer
Cal/OSHA Section 1637 sets the residential construction fall protection threshold at 15 feet. California deliberately chose a higher threshold than federal OSHA (6 feet) to provide contractors more flexibility on low-rise residential jobs while still protecting workers on taller residential structures.
Why the Other Options Are Wrong
Option A: 10 feet
10 feet is not the Cal/OSHA residential threshold. It is a common distractor that falls between the federal (6 ft) and California (15 ft) standards, making it seem like a reasonable middle ground, but it has no regulatory basis.
Option B: 6 feet
6 feet is the federal OSHA standard for residential construction, not California's. Cal/OSHA diverges from federal OSHA specifically on this point, requiring fall protection at 15 feet instead of 6 feet.
Option C: 20 feet
20 feet exceeds the actual requirement. Waiting until 20 feet to require fall protection would leave workers unprotected at heights that Cal/OSHA has determined are dangerous enough to mandate a fall arrest system.
Memory Technique
Think '1-5 for California residential': Cal/OSHA = 15 feet. Federal = 6 feet. California gives you more room (15 > 6) before requiring a fall arrest system on residential sites.
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