Fire Watch Patrol Intervals
Contents
Fire Watch Patrol Intervals: 15, 30 or 60 Minutes
Pick the wrong interval and the marshal writes you a ticket. Pick the right one and you sleep through the night. Below is the no fluff guide to choosing fire watch patrol intervals so you stay compliant without burning cash.
The Code Says This
NFPA 601 wants a guard to visually inspect every impaired zone every 15 minutes when sprinklers are offline. Some smaller towns allow 30 minutes if the building is fully evacuated, but 60 minutes is never legal for active impairment.
High hazard areas like paint booths or generator rooms always default to 15 minutes regardless of city size. If you guess 30 to save money, the fine will erase any savings.
When 30 Minutes Is Actually Allowed
Only if the building is empty, power is cut, and no hot work occurs. Think of it as a vacant warehouse waiting for final inspection. The second a contractor flips a breaker or strikes an arc, you snap back to 15.
And you still need written approval from the fire marshal beforehand. Call and ask; an email confirmation beats a surprise citation.
Real Cost Math
15 minute rounds on a 6 hour outage equals 24 patrols. 30 minute rounds cut that to 12. At $70 per hour you save roughly $210, but one $5 k violation wipes out 23 future shifts. The cheaper interval is only a bargain until the inspector arrives.
Hidden Factor: Guard Fatigue
Walking a 12 story high rise every 15 minutes is equal to 3 miles per shift. Tired guards miss things. We rotate two guards every 4 hours so eyes stay fresh and logs stay accurate. The extra $140 beats a missed ember that turns into a $400 k claim.
Technology Shortcut
Our tablets beep every 14 minutes. The guard must scan the NFC tag on each floor or the app flags a missed round. Supervisors see the alert in real time and can redirect the nearest float crew if needed. No guesswork, no blank spaces in the log.
Quick Decision Tree
- Sprinklers down + people inside = 15 minutes
- Hot work anywhere = 15 minutes
- Building empty + no ignition source = ask marshal for 30
- Never 60 minutes during active impairment
Still unsure which fire watch patrol interval fits your job? Call us and we will tell you in under 3 minutes and email the code section so you can show the inspector chapter and verse.
And remember, shorter intervals cost a little more per shift but save you thousands per violation. Pick 15, sleep tight.



