Residential · IRC 2021 §R305.1 / §R305.1.1
Basement Ceiling Height at Beams and Ducts
Beams, girders and ducts may project to 6 ft 4 in above a basement floor. Girders 36 in or more apart clear may drop to 78 in. Non-habitable basement portions need 6 ft 8 in elsewhere.. Referenced to IRC 2021 §R305.1 / §R305.1.1.
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