CSLB C-46 Solar ContractorSafetyMedium
A solar crew is installing modules on a flat commercial roof. The work area is close to the edge of the roof (within 6 feet) and there is no parapet wall. What is the MOST appropriate fall protection system required by Cal/OSHA for this scenario?
- AVisual warning signs placed at the roof edge.
- BWarning line system combined with a safety monitor system.
- CPersonal fall arrest system (PFAS) or guardrail system.
- DSafety monitor system only, as long as the roof is flat.
Show answer & explanationAnswer & explanation
Correct answer: C. Personal fall arrest system (PFAS) or guardrail system.
Cal/OSHA requires a guardrail system, safety net system, or personal fall arrest system (PFAS) for employees working 6 feet or more above a lower level. For flat roofs, a warning line system combined with a safety monitor is allowed for work further than 6 feet from the edge, but within 6 feet, positive fall protection (PFAS or guardrail) is mandatory.
Why the other options are wrong
- A. Visual warning signs are insufficient as a primary fall protection method and do not meet Cal/OSHA requirements for this distance from the edge.
- B. A warning line system combined with a safety monitor is typically for work 6 feet or more from the edge on low-slope roofs, not within 6 feet.
- D. Safety monitor systems alone are generally not permitted for work within 6 feet of an unprotected edge on flat roofs.
Cal/OSHA Flat Roof Fall Protection (Close to Edge)
When working on a low-slope/flat roof within 6 feet of an unprotected edge, Cal/OSHA mandates positive fall protection such as a Personal Fall Arrest System (PFAS) or a guardrail system.
- Applies to work within 6 feet of an unprotected edge.
- Low-slope/flat roof (pitch 4:12 or less).
- PFAS or guardrail systems are the primary methods.
- Warning line systems with safety monitors are for areas further from the edge.
Memory trick: Flat roof, edge near? PFAS or rails, no fear!