To limit the probability that the supports for a floor assembly will prematurely fail in a fire situation, which could lead to the collapse of the floor assembly, which could lead to the spread of fire from the basement to an upper storey, which could lead to damage to the building.
To limit the probability that the supports for a floor assembly will prematurely fail in a fire situation, which could lead to the collapse of the floor assembly, which could lead to damage to the building.