What is compartmentation in fire safe design, and what purpose does it serve?

• A. The process of removing all occupants from a building.
• B. The strategy of providing multiple overlapping alarms.
• C. Dividing a building into fire-rated compartments to confine fire and smoke and provide evacuation time.
• D. The design of open-plan spaces to maximize visibility.

Answer: (C)

Compartmentation in fire safe design is about dividing a building into fire-rated compartments using rated walls, floors, and doors so that fire and smoke are contained within the area where they start. This containment slows the spread of heat, fire, and smoke, protects people by keeping evacuation paths clear for longer, and gives firefighters a safer window to control the blaze.

That’s why dividing a building into fire-rated compartments to confine fire and smoke and provide evacuation time is the best description. It’s not about evacuating occupants as the sole goal, nor is it about alarms or open-plan layouts—the latter would not limit fire spread or protect egress routes.