How long is the optimal time window for extinguishing a fire in a facility?
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For chemical production facilities, what is the optimal time window for extinguishing a fire once it breaks out?
The sooner, the better! It is easiest to extinguish the fire when it has just started. Steel structures tend to soften and may collapse within about 8 minutes in a fire; therefore, it is essential to turn on the fire extinguishing water to cool them down during this time.
Class 1 requires a fire resistance limit of no less than 1.5 hours; the 8-minute figure mentioned for the second floor means that the structure would collapse before the firefighters even arrived