The Company requires a fire watch during hot work if any of the following conditions are present:
- Slag, weld splatter, or sparks which might pass through an opening and cause a fire.
- Fire-resistant guards or curtains are not used to prevent the ignition of combustible materials on or areas where combustables are stored.
- Combustible material is located closer than 35 feet to the hot work area, in either the horizontal or vertical direction, that cannot be removed, protected with flame-proof covers, nor otherwise shielded with solid non-combustable fire-resistant guards or curtains.
- Hot work occurs on or near insulation, combustible coatings, or combustable walls or walls with combustable inner core fill materials.
- Combustible materials adjacent to the opposite sides of walls.
- The hot work is close enough to cause ignition through heat radiation or conduction on the following:
- Insulated pipes, partitions, walls, or overheads
- Combustible materials and/or coatings, or
- Unprotected combustible pipes or cable runs
The number and location of personnel performing fire watch duty depends on the scope of work. For example, if there are multiple combustable material opportunities that cannot be moved from the immediate vacinity of the hot work operation, a fire watch must be posted simultaneously in each area. Similarly, where hot material from hot work could spread or fall over more than one level, as in elevated storage areas, rafters, machinery spaces, or loading docks, a fire watch must be posted at each affected level, unless positive means are available to prevent the spread or fall of hot material.