To limit the probability that openings in rated wall or ceiling membranes will contribute to the spread of fire within the wall or ceiling space, which could lead to the premature failure or collapse of the wall or ceiling assembly, which could lead to damage to the building.
To limit the probability that openings in rated wall or ceiling membranes will contribute to the spread of fire within the wall or ceiling space, which could lead to the premature failure or collapse of the wall or ceiling assembly, which could lead to the spread of fire from one compartment to another, which could lead to damage to the building.