NV B General Building Practice Questions - Nevada B General Building Contractor Examination Exam

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Per 2018 IBC 1907.1, what is the minimum thickness of a concrete floor slab supported directly on the ground, and what vapor retarder is required unless an approved equivalent is used?

3 inches thick with a 4-mil polyethylene vapor retarder 4 inches thick with no vapor retarder 3-1/2 inches thick with a 6-mil polyethylene vapor retarder lapped at least 6 inches 5 inches thick with a 10-mil vapor retarder

Correct Answer:

3-1/2 inches thick with a 6-mil polyethylene vapor retarder lapped at least 6 inches

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