Which term describes an enclosed space meeting specific fire safety criteria?

Which term describes an enclosed space meeting specific fire safety criteria?

• A. Compartment
• B. Room
• C. Area
• D. Zone

Answer: (A)

A compartment is the enclosed space designed to confine a fire and limit its spread. In NFPA 13R terms for low-rise residential systems, buildings are divided into compartments whose walls, floors, and ceilings provide a fire-resistance boundary; openings are protected to keep the enclosure intact. This combination of enclosure and fire-resistance criteria is what makes a space a compartment, not just any locked or closed room. A room, while enclosed, isn’t inherently defined by fire-resistance boundaries or designed to contain a fire as a compartment is. An area refers to a broader part of a building, not necessarily enclosed by fire-rated barriers. A zone is a design concept used for coordinating sprinkler coverage or hydraulic calculations, not specifically an enclosed fire-resisting space.

A compartment is the enclosed space designed to confine a fire and limit its spread. In NFPA 13R terms for low-rise residential systems, buildings are divided into compartments whose walls, floors, and ceilings provide a fire-resistance boundary; openings are protected to keep the enclosure intact. This combination of enclosure and fire-resistance criteria is what makes a space a compartment, not just any locked or closed room. A room, while enclosed, isn’t inherently defined by fire-resistance boundaries or designed to contain a fire as a compartment is. An area refers to a broader part of a building, not necessarily enclosed by fire-rated barriers. A zone is a design concept used for coordinating sprinkler coverage or hydraulic calculations, not specifically an enclosed fire-resisting space.