OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A worker is installing a new roof on a commercial building. The roof has a pitch of 8:12 (meaning it rises 8 inches vertically for every 12 inches horizontally). What is the minimum pitch that OSHA classifies as a 'steep roof,' requiring specific fall protection measures beyond general requirements?
- A4:12
- B7:12
- C5:12
- D6:12
Show answer & explanationAnswer & explanation
Correct answer: A. 4:12
OSHA defines a steep roof as one with a pitch greater than 4 in 12. For such roofs, workers must use a personal fall arrest system, safety net system, or guardrail system, even if the height is less than 6 feet.
Why the other options are wrong
- B. This pitch is steeper than the 4:12 threshold, meaning it would definitely be considered steep, but it's not the minimum.
- C. This pitch is steeper than the 4:12 threshold, meaning it would definitely be considered steep, but it's not the minimum.
- D. This pitch is steeper than the 4:12 threshold, meaning it would definitely be considered steep, but it's not the minimum.
Steep Roof Fall Protection
OSHA defines a 'steep roof' as one with a pitch greater than 4:12. On such roofs, workers must use fall protection (e.g., fall arrest systems) regardless of height, due to increased fall hazard.
- Pitch is rise over run (e.g., 4 inches of rise for every 12 inches of run).
- Specific fall protection required beyond general 6-foot rule.
- Prevents workers from sliding or falling off the roof.
Memory trick: Four-twelve slope, gives fall protection hope.