What is containment?
To confine a fire to the zone of origin, for a specified time, thereby preventing fire spread and leaving more time for safe evacuation of the building occupants. Specifically engineered containment systems are used as enclosures in instances where specific identifiable hazards within a building need to be independently isolated from the remainder of the building. Fire-resistive enclosures used for containment are subjected to fire exposure conditions specified in various related test Standards.