The estimator marks a risk item in the bid recap: what force must a top rail withstand?
Correct Answer
B) At least 200 lb outward or downward
At least 200 lb outward or downward is the controlling requirement.502(b)(3). Other choices: the distractors are related-looking contract or field terms, but they do not match the cited requirement for review item 224.
Why This Is the Correct Answer
At least 200 lb outward or downward is the controlling requirement.502(b)(3).
Why the Other Options Are Wrong
Option A: 50 lb; under a different safety or administration requirement
The trap in A is 50 lb; under a different safety or administration requirement. That selection is wrong because 50 lb; under a different safety or administration requirement is the wrong OSHA fall-protection number for the item asked.
Option C: 100 lb
Choice C (100 lb) is rejected because 100 lb is the wrong OSHA fall-protection number for the item asked.
Option D: 150 lb
In general project requirements, 150 lb is the wrong selection for Guardrail top rail force: 150 lb is the wrong OSHA fall-protection number for the item asked.
Memory Technique
Link guardrail top rail force to its book condition; a different condition means a different answer than At least 200 lb outward or downward.
Reference Hint
Open 29 CFR 1926 OSHA Construction Standards; use 29 CFR 1926.502(b)(3) to confirm that At least 200 lb outward or downward is the controlling requirement.502(b)(3).
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