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Extinguishers should be supplied by the group performing the hot work. Make immediately available at the work area 2 fully charged and operable fire extinguishers appropriate for the type of possible fire.Do not perform hot work on pipes or other metal that is in contact with combustible walls, partitions, ceilings, roofs, or other combustibles if the work is close enough to cause ignition by conduction.Do not attempt hot work on a partition, wall, ceiling, or roof that has a combustible covering or insulation, or on walls or partitions of combustible sandwich-type panel construction.If it's impractical to relocate combustibles, post a hot work fire watch on the opposite side of the work. Take precautions to prevent the ignition of combustibles on the other side of walls, partitions, ceilings, or roofs where hot work will be performed by relocating them.Provide fire-retardant shields or guards to prevent ignition if hot work is done near walls, partitions, ceilings, or roofs of combustible construction.Tightly cover openings or cracks in walls, floors, or ducts within 35 feet of the site with fire-retardant or noncombustible material to prevent the passage of sparks to adjacent areas.Edges of covers at the floor must be tight to prevent sparks from going under them, including where several covers overlap when protecting a large pile. If relocation is impractical, protect combustibles with fire-retardant covers, shields, blankets, or curtains. Move combustible materials at least 35 feet away from hot work operations.Note: Where floors have been wet down, personnel operating arc welding or cutting equipment must be properly grounded and equipped with spark arrestors protected from possible shock or flash burns. Keep combustible floors (except wood on concrete) either wet, covered with damp sand, or protected by non-combustible or fire-retardant shields, blankets, pads, and/or curtains.Sweep the floor clean for a radius of 35 feet if combustible materials such as paper or wood shavings are present.Make sure equipment to be used (e.g., welding equipment, shields, personal protective equipment, fire extinguishers, etc.) is in satisfactory operating condition and good repair.

(See 'Where hot work may be performed' above.) The following conditions must be confirmed by the CHWSS before hot work operations can commence: Hot work is allowed only in fire-safe areas. Areas with an accumulation of combustible dusts where explosive atmospheres can develop (e.g., wood working dust collection systems).Areas where explosive or potentially explosive atmospheres are present (e.g., on drums or tanks previously containing solvents or other combustible or flammable materials, high or low-pressure gas lines, etc.).

Buildings with fire sprinklers if the fire protection system is impaired.

A permit-required area is an area made fire-safe by removing or protecting combustibles from ignition sources.

Examples: a maintenance shop or a detached outside location constructed of noncombustible or fire-resistive materials.

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Designated areas are essentially free of combustible and flammable contents and are segregated from adjacent areas. A designated area is a permanent hot work location designed for or approved by a Competent Hot Work Safety Supervisor (CHWSS).

Perform hot work operations only in designated areas or permit-required areas.

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