To limit the probability that materials used to construct fire escapes will fail prematurely when exposed to fire, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To limit the probability that materials used to construct fire escapes will fail prematurely when exposed to fire, which could lead to emergency responders being delayed or ineffective in carrying out their emergency response operations, which could lead to the spread of fire, which could lead to harm to persons.