A superintendent asks whether a field-built top rail is strong enough. What minimum outward or downward force must the top rail resist?
Correct Answer
D) 200 lb
Guardrail top rails must withstand at least 200 lb applied outward or downward near the top edge. Other choices are below the OSHA criterion or confuse the midrail force with the top-rail force.
Why This Is the Correct Answer
Guardrail top rails must withstand at least 200 lb applied outward or downward near the top edge. Other choices are below the OSHA criterion or confuse the midrail force with the top-rail force.
Why the Other Options Are Wrong
Option A: 50 lb
Choice A gives 50 lb. Its specific error: 50 lb is the wrong OSHA fall-protection number for the item asked.
Option B: 100 lb
Choice B (100 lb) is rejected because 100 lb is the wrong OSHA fall-protection number for the item asked.
Option C: 150 lb
In general project requirements, 150 lb is the wrong selection for Guardrail strength: 150 lb is the wrong OSHA fall-protection number for the item asked.
Memory Technique
Link guardrail strength to its book condition; a different condition means a different answer than 200 lb.
Reference Hint
Open 29 CFR 1926 OSHA Construction Standards; use 29 CFR 1926.502(b)(3) to confirm that Guardrail top rails must withstand at least 200 lb applied outward or downward near the top edge.
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