• 29 CFR 1926.352 specifies circumstances in which fire watchers are needed on construction sites, as well as their training and responsibilities.

Welding and metal cutting operations produce molten metal, sparks, weld spatter, slag, and hot work surfaces. All of these can create a situation that can cause fires.

29 CFR 1926.352 is concerned with fire hazards in situations where:

• Other than a minor fire might develop,
• Combustible material is located within 35 feet of the work,
• Combustible material is located more than 35 feet away but can be easily ignited by sparks,
• Wall or floor openings within 35 feet expose combustible material in adjacent areas or concealed wall or floor spaces, or
• Combustible materials are located on the opposite side of surfaces being welded.

Where to go for more information:

• The company fire prevention plan.
• 29 CFR 1926 Subpart J — Welding and cutting.
• ANSI Z49.1-1967 — Safety in Welding and Cutting.

Fire watchers in construction

According to 1926.352, construction employees assigned to guard against fire during welding, cutting, or heating operations (and for a sufficient time after completion of the work) are to be instructed on the specific anticipated fire hazards and how the provided firefighting equipment is to be used.

Fire watchers are additional personnel who:

• Provide additional safeguards against fire during and after the welding, cutting, or heating operations;
• Are trained on the specific fire hazards for that job and location; and
• Know where fire prevention equipment is located and how to use it.

The fire watch is to be maintained for at least 30 minutes following completion of the work.

Fire watchers must be trained in:

• Assessing whether a fire watcher is necessary,
• The responsibilities of the fire watcher,
• The company’s welding best practices,
• Checking for fire hazards prior to welding or cutting,
• Covering fire hazards that cannot be moved,
• Obtaining a hot work permit, and
• Reporting fires.