Chapter 4 — SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE
Section 413 — COMBUSTIBLE STORAGE
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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413.1 General. ¶
413.1 General. High-piled stock or rack storage in any occupancy group shall comply with the California Fire Code .
413.2 Attic, under-floor and concealed spaces. ¶
413.2 Attic, under-floor and concealed spaces. Attic, under-floor and concealed spaces used for storage of combustible materials shall be protected on the storage side as required for 1-hour fire-resistance-rated construction. Openings shall be protected by assemblies that are self-closing and are of noncombustible construction or solid wood core not less than 1 [3] / 4 inches (45 mm) in thickness. Exception: Neither fire-resistance-rated construction nor opening protectives are required in any of the following locations: 1. Areas protected by approved automatic sprinkler systems. 2. Group…