To limit the probability that certain concealed spaces will not be separated from certain other parts of the building, which could lead to the spread of fire within these spaces, which could lead to damage to the building.
To limit the probability that fire blocking material used to block and separate concealed spaces will not remain in place for a certain minimum time when subjected to fire conditions, which could lead to the spread of fire within these spaces, which could lead to damage to the building.
To state the application of Article 3.1.11.7.