A personal fall arrest system must be rigged so that an employee cannot free fall more than:
Correct Answer
B) 6 feet
OSHA requires personal fall arrest systems to limit free fall distance to 6 feet or less and arrest the fall within an additional 3.5 feet.
Why This Is the Correct Answer
OSHA Standard 29 CFR 1926.502(d)(2) specifically requires that personal fall arrest systems be rigged so that an employee cannot free fall more than 6 feet. This 6-foot maximum free fall distance is a critical safety requirement designed to minimize the forces exerted on a worker's body during a fall arrest event. The system must also arrest the fall within an additional 3.5 feet, bringing the total fall distance to no more than 9.5 feet.
Why the Other Options Are Wrong
Option A: 4 feet
4 feet is too restrictive and not the OSHA standard. While a shorter free fall distance would be safer, OSHA regulations specifically allow up to 6 feet of free fall, recognizing practical limitations in rigging fall arrest systems in construction environments.
Option C: 8 feet
8 feet exceeds OSHA's maximum allowable free fall distance. This would subject workers to dangerous deceleration forces that could cause serious injury. OSHA's 6-foot limit is based on biomechanical studies of human tolerance to fall arrest forces.
Option D: 10 feet
10 feet is significantly beyond OSHA's safety limits and would likely result in severe injury or death. Such a distance would generate excessive arrest forces that could cause internal injuries, even with proper fall arrest equipment.
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