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Glossary Term Defined

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Gross, Floor Area

INTERNATIONAL BUILDING CODE: SEC: 1002.1

The floor area within the inside perimeter of the exterior walls of the building under consideration, exclusive of vent shafts and courts, without deduction for corridors, stairways, closets, the thickness of interior walls, columns or other features. The floor area of a building, or portion thereof, not provided with surrounding exterior walls shall be the usable area under the horizontal projection of the roof or floor above. The gross floor area shall not include shafts with no openings or interior courts. NPFA-101 has a different definition and some local building codes also depart from this measure in some respects.

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