RE- NFPA 221

[PETER CIRILLO]

NFPA 221 talks about High challenge fire walls........what constitutes a "high challenge fire occupancy", I assume it is high hazard "H" occupancies ?

 

[blugosi]

Late reply, but these HC walls are the equivalent of Factory Mutual definition MFL (Max foreseeable loss) walls, implemented in a way to keep standing even after anything on either side has been pulverized or something, assuming all fire protection systems did not contain the incident (insurance fraud maybe?)

According to Datasheet DS 1-22 ,
"The event can be related to fire, explosion, equipment failure, or other scenarios, with the exception of natural hazards." with indicative scenarios being a fire in a key manufacturing plant or warehouse, boiler explosion, runaway thermal reaction.

"The MFL scenario is based on impaired active protection systems and/or safety devices, reliance on passive protection only, and an understanding of the overall hazard and associated business impact. Additional unfavorable conditions, such as delayed fire service response, are considered."

 

[PETER CIRILLO]

Late reply, but these HC walls are the equivalent of Factory Mutual definition MFL (Max foreseeable loss) walls, implemented in a way to keep standing even after anything on either side has been pulverized or something, assuming all fire protection systems did not contain the incident (insurance fraud maybe?)

According to Datasheet DS 1-22 ,
"The event can be related to fire, explosion, equipment failure, or other scenarios, with the exception of natural hazards." with indicative scenarios being a fire in a key manufacturing plant or warehouse, boiler explosion, runaway thermal reaction.

"The MFL scenario is based on impaired active protection systems and/or safety devices, reliance on passive protection only, and an understanding of the overall hazard and associated business impact. Additional unfavorable conditions, such as delayed fire service response, are considered."

Better late than never, thank you