A building’s fire hazards can become significantly higher very rapidly in cases when the building is under construction, undergoing repairs, or some part of the fire protection system is not operational. In such scenarios, relying on the alarms and equipment might not be enough.
Employing an emergency fire watch is a way to ensure trained on-site coverage that will monitor and respond to any changes. Conditions requiring fire guard coverage can arise at any kind of property. Hot work, system impairments, construction activities, and even temporary hazards can give rise to the need for constant observation.
Scenario 1: When Fire Protection Systems Are Out of Service
A damaged or impaired sprinkler, alarm, standpipe, fire pump, or other protection system can reduce a building’s normal level of fire defense.
NFPA guidance on fire protection system impairments calls for assessing the extent and expected duration of an impairment and considering the increased risk in affected areas. For longer impairments, an approved fire watch may be one of the measures used to address the added risk.
This situation can occur during planned maintenance as well as unexpected equipment failures. The appropriate response depends on the affected system, building conditions, applicable requirements, and direction from the authority having jurisdiction.
Scenario 2: Hot Work Creates a Different Level of Exposure
Welding, cutting, brazing, grinding, and similar work can produce sparks, flames, or intense heat. Those ignition sources become more concerning when combustible materials, concealed spaces, or openings are nearby.
OSHA identifies circumstances where fire watches are required during hot work, including situations where sparks can pass through openings or combustible materials cannot be removed or adequately protected.
A fire watch should also be separate from the person performing the hot work. OSHA states that the person assigned to fire watch cannot simultaneously perform other duties while actively carrying out that role.
Scenario 3: Construction and Renovation Projects
Construction and renovation can temporarily change a building’s normal fire safety conditions. Walls may be opened, fire barriers may be altered, combustible materials may accumulate, and permanent protection systems may not yet be fully operational.
OSHA requires employers to maintain an effective fire protection and prevention program throughout construction, repair, alteration, and demolition work. It also requires firefighting equipment to remain available as required by the applicable standards.
On-site monitoring can therefore become particularly relevant during phases where normal safeguards are disrupted, or temporary hazards are present.
Scenario 4: Occupied Buildings With Active Work
Renovation within an occupied building presents yet another combination of risks – the hazards associated with the work performed and use of the building by the people at the same time.
The need to have a fire watch is determined by the introduction of temporary sources of ignition, blocking normal access to fire protection equipment, impact on alarm and suppression systems, and other factors requiring increased supervision.
Both work areas and adjacent rooms should be taken into account during the risk assessment. The heat, smoke, and sparks can spread beyond the location of work performed through openings, shafts, ceilings, or connected rooms.
Scenario 5: After a Fire or Other Emergency
A fire may be extinguished without every related hazard disappearing immediately. Hot materials, damaged electrical equipment, compromised fire protection systems, and concealed ignition points can create continuing concerns.
This is one reason post-incident monitoring should be based on the condition of the property and direction from qualified fire-safety personnel or the relevant authority. A temporary fire watch can be part of a broader response when ongoing observation is necessary.
What Effective Fire Guard Coverage Should Include
The exact duties depend on the site and applicable requirements, but effective coverage should be built around clear responsibilities.
Key elements may include:
- Continuous observation of designated areas
- Clear communication procedures
- Knowledge of the site’s fire hazards
- Access to appropriate emergency equipment
- Defined escalation procedures
- Authority to report unsafe conditions promptly
- Documentation of significant observations and incidents
OSHA’s fire-watch requirements for shipyard hot work specifically address training, assigned duties, equipment, communication, access, and the ability to respond to developing fires.
Final Takeaway
On-site fire guard coverage becomes particularly important when normal fire protection is disrupted or when work introduces a meaningful ignition risk. System impairments, hot work, construction, renovation, occupied buildings, and post-incident conditions can all require closer attention.
A well-planned emergency fire watch is not a replacement for functioning alarms, sprinklers, fire prevention measures, or emergency planning. It is an additional layer of protection used when site conditions create risks that demand active monitoring and prompt communication.
