fire-resistive ceiling
One having a fire endurance rating of at least 1 hr.
fire-endurance
Glossary
fire partition
In a building, a partition which has a fire-endurance rating of not less than 2 hr, but does not qualify
Glossary
class A, B, C, D, E, F
A classification applied to fire doors, fire windows, roof coverings, interior finishes, places of assembly, etc., to indicate gradations of