Chapter 64 — PYROPHORIC MATERIALS
Section 6405
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.
6405.1 General. The use of pyrophoric materials in amounts¶
exceeding the maximum allowable quantity per control area indicated in Table 5003.1.1(1) or 5003.1.1(3) shall be in accordance with Sections 5001, 5003, 5005 and this chapter.
6405.2 Weather protection. Where overhead construction is¶
provided for sheltering of outdoor use areas of pyrophoric materials, the use areas shall be provided with approved automatic fire-extinguishing system protection.
6405.3 Silane gas. The use of silane gas, and gas mixtures¶
with a silane concentration of 1.37 percent or more by volume, shall be in accordance with ANSI/CGA G-13.
TABLE 6404.2.1 PYROPHORIC GASES—DISTANCE FROM STORAGE TO EXPOSURES a
| MAXIMUM AMOUNT PER STORAGE AREA (cubic feet) |
MINIMUM DISTANCE BETWEEN STORAGE AREAS (feet) |
MINIMUM DISTANCE TO LOT LINES OF PROPERTY THAT CAN BE BUILT ON (feet) |
MINIMUM DISTANCE TO PUBLIC STREETS, PUBLIC ALLEYS OR PUBLIC WAYS (feet) |
MINIMUM DISTANCE TO BUILDINGS ON THE SAME PROPERTY |
||
|---|---|---|---|---|---|---|
| MAXIMUM AMOUNT PER STORAGE AREA (cubic feet) |
MINIMUM DISTANCE BETWEEN STORAGE AREAS (feet) |
MINIMUM DISTANCE TO LOT LINES OF PROPERTY THAT CAN BE BUILT ON (feet) |
MINIMUM DISTANCE TO PUBLIC STREETS, PUBLIC ALLEYS OR PUBLIC WAYS (feet) |
Nonrated construction or openings within 25 feet |
Two-hour construction and no openings within 25 feet |
Four-hour construction and no openings within 25 feet |
| 250 | 5 | 25 | 5 | 5 | 0 | 0 |
| 2,500 | 10 | 50 | 10 | 10 | 5 | 0 |
| 7,500 | 20 | 100 | 20 | 20 | 10 | 0 |
For SI: 1 foot = 304.8 mm, 1 cubic foot = 0.02832 m 3 . a. The minimum required distances shall be reduced to 5 feet where protective structures having a minimum fire resistance of 2 hours interrupt the line of sight
between the container and the exposure. The protective structure shall be not less than 5 feet from the exposure. The configuration of the protective structure shall allow natural ventilation to prevent the accumulation of hazardous gas concentrations.
64-4 2022 CALIFORNIA FIRE CODE
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CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE
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