NARA Conference - 2008 Performance criteria Demonstrate for each design fire scenario that each space will be fully isolated from the fire before the smoke or thermal layer descends to a level where irreversible damage can occur the smoke and thermal layer will not descend to a level where irreversible damage can occur in any room no fire effects will reach any space beyond the room of origin A.9.2.2.2 NFPA 909 recommendations
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