Ask any superintendent what the most common fire watch violation is, and the answer is the same: the welder watching himself. OSHA's own fact sheet is explicit — the person performing hot work cannot also serve as the fire watch. The duties are continuous, including during breaks. No exceptions. Yet this single violation accounts for more citations than almost any other hot work deficiency.
Separation of Duties
The person performing hot work cannot be the fire watch. This is one of the most commonly violated requirements in the field. GPS-verified check-ins from a separate device prove a second individual was present at the work location — eliminating any question about whether the fire watch was independent.
Continuous Duty
Fire watch duties are continuous, including during breaks. If the fire watcher needs to leave the area for any reason, a qualified replacement must be assigned before they step away. There is no exception for short breaks, bathroom trips, or shift changes.
Post-Work Requirements
OSHA requires a minimum 30-minute post-work watch. NFPA 51B (2019 edition) now requires 60 minutes. Many facility owners and GCs require even longer. The longer the required window, the harder it becomes to verify with paper — and the more critical timed, automated check-ins become.
Source: OSHA Publications