Workers are installing steel beams at a height of 25 feet. A personal fall arrest system is being used. What is the maximum allowed free fall distance before the system activates?
Correct Answer
C) 6 feet
OSHA limits free fall distance to 6 feet maximum for personal fall arrest systems. This limitation helps reduce the forces on the worker's body and the anchor point when the system arrests the fall.
Why This Is the Correct Answer
OSHA 29 CFR 1926.502(d)(2) specifically mandates that personal fall arrest systems must be rigged such that an employee can neither free fall more than 6 feet nor contact any lower level. This 6-foot limitation is critical because it minimizes the arresting force on both the worker's body and the anchor point when the fall protection system engages. Exceeding this distance significantly increases the risk of serious injury from deceleration forces and potential system failure.
Why the Other Options Are Wrong
Option A: 4 feet
4 feet is too restrictive and not the OSHA standard, though it would provide an extra safety margin
Option B: 10 feet
10 feet far exceeds OSHA standards and would likely result in serious injury or death from excessive fall forces
Option D: 8 feet
8 feet exceeds OSHA's maximum allowable free fall distance and would create dangerous deceleration forces
Memory Technique
Think 'SIX FEET SAFE' - the maximum free fall distance matches the typical height of a tall person, making it easy to visualize
Reference Hint
OSHA Construction Standards 29 CFR 1926.502 - Fall Protection Systems Criteria and Practices
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