Chapter 4 — SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE
Section 417 — DRYING ROOMS
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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[F] 417.1 General. A drying room or dry kiln installed within a building shall be constructed entirely of approved noncombustible materials or assemblies of such materials regulated by the approved rules or as required in the general and specific sections of this chapter for special occupancies and where applicable to the general requirements of the California Mechanical Code . [F] 417.2 Piping clearance. Overhead heating pipes shall have a clearance of not less than 2 inches (51 mm) from combustible contents in the dryer. [F] 417.3 Insulation. Where the operating temperature of the dryer is…