Chapter 35 — WELDING AND OTHER HOT WORK
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.
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Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. Any unauthorized reproduction or distribution is a violation of the federal copyright act and the license agreement, and subject to civil and criminal penalties thereunder.
35-2 2022 CALIFORNIA FIRE CODE
Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. Any unauthorized reproduction or distribution is a violation of the federal copyright act and the license agreement, and subject to civil and criminal penalties thereunder.
CHAPTER 35
WELDING AND OTHER HOT WORK
User note:
About this chapter: Chapter 35 covers requirements for safety in welding and other types of hot work by reducing the potential for fire igni- tions that usually result in large losses. Several different types of hot work would fall under the requirements found in Chapter 35, including both gas and electric arc methods and any open-torch operations. Many of the activities of this chapter focus on the actions of the occupants.
3510.1 General.¶
Hot work performed on the interior or exterior of tanks that hold or have held flammable or combustible liquids shall be in accordance with Section 3510.2 and Chapters 4, 5, 6, 7 and 10 of NFPA 326.
3510.2 Prevention. The following steps shall be taken to¶
minimize hazards where hot work must be performed on a flammable or combustible liquid storage container:
Use alternative methods to avoid hot work where possible.
Analyze the hazards prior to performing hot work, identify the potential hazards and the methods of hazard control.
Hot work shall conform to the requirements of the code or standard to which the container was originally fabricated.
Test the immediate and surrounding work area with a combustible gas detector and provide for a means of continuing monitoring while conducting the hot work.
Qualified employees and contractors performing hot work shall use an industry-approved hot work permit system to control the work.
Personnel shall be properly trained on hot work policies and procedures regarding equipment, safety, hazard controls and job-specific requirements.
On-site safety supervision shall be present where hot work is in progress to protect the personnel conducting the hot work and provide additional overview of sitespecific hazards.
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