Section BB104 — FIRE AREA — 2025 California Fire Code (Title 24, Part 9)

BB104.1 General. ¶

BB104.1 General. The fire area shall be the total floor area of all floor levels within the exterior walls, and under the horizontal projec- tions of the roof of a building, except as modified in Section 4.

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BB104.2 Area separation. ¶

BB104.2 Area separation. Portions of buildings which are separated by one or more 4-hour area separation walls constructed in accor- dance with the building code, without openings and provided with a 30-inch (762 mm) parapet, are allowed to be considered as separate fire areas.

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BB104.3 Type I and Type IB construction. ¶

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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