Appendix BB — FIRE-FLOW REQUIREMENTS FOR BUILDINGS
Section BB104
California Fire Code (Title 24, Part 9) · 2022 edition · updated 2026-09-10 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
BB104.1 General. The fire area shall be the total floor area¶
of all floor levels within the exterior walls, and under the hor- izontal projections of the roof of a building, except as modi- fied in Section 4.
BB104.2 Area separation. Portions of buildings which are¶
separated by one or more 4-hour area separation walls con- structed in accordance with the building code, without open- ings and provided with a 30-inch (762 mm) parapet, are allowed to be considered as separate fire areas.
BB104.3 Type I and Type IB construction. The fire area of¶
buildings constructed of Type I and Type IB construction shall be the area of the three largest successive floors.
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