CSLB C-39 Roofing ContractorSafety and RepairHard
A roofing crew is working on a steep-slope roof (greater than 4:12 pitch) that is over 20 feet high. The contractor is providing guardrail systems at the eaves. What is the minimum top rail height requirement for these guardrail systems according to Cal/OSHA?
- A39 inches
- B42 inches
- C36 inches
- D45 inches
Show answer & explanationAnswer & explanation
Correct answer: B. 42 inches
Cal/OSHA (and federal OSHA) requires the top rail of a guardrail system to be 42 inches (plus or minus 3 inches) above the walking/working level. This standard height ensures effective fall protection.
Why the other options are wrong
- A. 39 inches is below the standard 42-inch requirement for guardrail top rails.
- C. 36 inches is too low and does not meet the Cal/OSHA minimum requirement for guardrail top rail height.
- D. 45 inches is within the permissible range but is not the minimum requirement; 42 inches is the standard minimum.
Cal/OSHA Guardrail Height
The top rail of a guardrail system must be 42 inches (+/- 3 inches) above the walking/working surface according to Cal/OSHA.
- Standard for fall protection guardrails.
- Ensures effective barrier against falls.
- Midrail and toeboard requirements also apply.
Memory trick: Forty-two inches high, to keep you safe from the sky.