The stormwater inspector walks the site and notes this item: how far should a portable ladder extend above an upper landing?
Correct Answer
A) At least 3 ft
At least 3 ft is the controlling requirement.1053(b)(1). Other choices: the distractors are related-looking contract or field terms, but they do not match the cited requirement for review item 176.
Why This Is the Correct Answer
At least 3 ft is the controlling requirement.1053(b)(1).
Why the Other Options Are Wrong
Option B: 12 in.; without satisfying the required project control
The trap in B is 12 in.; without satisfying the required project control. That selection is wrong because 12 in.; without satisfying the required project control is not the OSHA ladder setup, extension, or access dimension cited here.
Option C: 18 in.
Choice C gives 18 in. Its specific error: 18 in. is not the OSHA ladder setup, extension, or access dimension cited here.
Option D: 6 ft
Choice D (6 ft) is rejected because 6 ft is not the OSHA ladder setup, extension, or access dimension cited here.
Memory Technique
Treat ladder extension like a labeled shelf; only the matching condition belongs with At least 3 ft.
Reference Hint
Open 29 CFR 1926 OSHA Construction Standards; use 29 CFR 1926.1053(b)(1) to confirm that At least 3 ft is the controlling requirement.1053(b)(1).
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