Chapter 35 — WELDING AND OTHER HOT WORK
Section 3501
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.
3501.1 Scope. Welding, cutting, open torches and other hot¶
work operations and equipment shall comply with this chapter.
3501.2 Permits. Permits shall be required as set forth in¶
Section 105.5.
3501.3 Restricted areas. Hot work shall only be conducted¶
in areas designed or authorized for that purpose by the personnel responsible for a hot work program. Hot work shall not be conducted in the following areas unless approval has been obtained from the fire code official:
Areas where the sprinkler system is impaired.
Areas where there exists the potential of an explosive atmosphere, such as locations where flammable gases, liquids or vapors are present.
Areas with readily ignitable materials, such as storage of large quantities of bulk sulfur, baled paper, cotton, lint, dust or loose combustible materials.
On board ships at dock or ships under construction or repair.
At other locations as specified by the fire code official.
3501.4 Cylinders and containers. Compressed gas cylinders¶
and fuel containers shall comply with this chapter and Chapter 53.
3501.5 Design and installation of oxygen-fuel gas systems.¶
An oxygen-fuel gas system with two or more manifolded cylinders of oxygen shall be in accordance with NFPA 51.
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