AL Building Under 4 Stories Practice Questions - Alabama Building Contractor Under Four Stories Examination Exam

Per typical IRC/IBC frost-protection practice, footings must extend to which of the following depths?

Six inches below finished grade in all climates At or below the local frost line, and not less than 12 inches below undisturbed ground surface Twenty-four inches below grade regardless of frost depth Only to the top of the undisturbed native soil

Correct Answer:

At or below the local frost line, and not less than 12 inches below undisturbed ground surface

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