For example, if the firestop systems in a structure were inoperable, a significant part of the fire safety plan might be compromised in the event of a fire because the walls and floors that contain the firestops are intended to have a fire-resistance rating.
In case the firestop systems within a building fail, a significant part of the fire safety plan would likely be rendered ineffective as the walls and floors containing the firestops are intended to provide a certain level of fire resistance.