To limit the probability that floor assemblies of exterior passageways that are used as part of a means of egress will fail or collapse prematurely when exposed to fire, which could lead to damage to the building.
To limit the probability that floor assemblies of exterior passageways that are used as part of a means of egress will fail or collapse prematurely when exposed to fire, which could lead to delays or ineffectiveness in emergency response operations, which could lead to the further spread of fire, which could lead to damage to the building.