OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A worker is installing pre-fabricated wall panels on a multi-story building. As the panels are being lifted into place, they create an unprotected edge where a fall hazard exists. What is this type of fall hazard specifically referred to as by OSHA?
- AAn open-sided floor
- BA leading edge
- CA floor opening
- DAn unprotected perimeter
Show answer & explanationAnswer & explanation
Correct answer: B. A leading edge
OSHA defines a 'leading edge' as the edge of a floor, roof, or formwork for a floor or other walking/working surface which changes location as additional sections are erected. It's a dynamic fall hazard.
Why the other options are wrong
- A. An open-sided floor refers to an existing floor with an unprotected side, not a dynamic edge during construction.
- C. A floor opening is a hole or gap in an existing floor, not a moving edge.
- D. An unprotected perimeter is a general term; 'leading edge' is the specific OSHA term for this dynamic hazard.
Leading Edge (Fall Protection)
A 'leading edge' is an unprotected edge of a floor, roof, or formwork that changes location as additional sections are erected. It presents a dynamic fall hazard requiring specific fall protection measures.
- Dynamic, constantly changing fall hazard.
- Requires fall protection (e.g., fall arrest systems, safety nets).
- Often encountered in steel erection, pre-cast concrete, and decking.
Memory trick: Leading the way, falling's a sway.