Fire barriers are used for area separations and hazard protection; an example includes which pair?

• A. Stairwells and Shafts
• B. Attic Access and Utility Services
• C. FDC Manifolds and OS&Y Valves
• D. Fire Depository Boxes

Answer: (A)

Fire barriers are fire-resistance-rated assemblies that create separations between areas and protect life safety by slowing or stopping the spread of fire and smoke. An example of how this concept is applied is enclosing stairwells and vertical shafts with fire barriers. Enclosing stairwells helps keep the exit path protected so occupants can evacuate safely even if fire is burning on other floors. Enclosing shafts, such as elevator or utility shafts, prevents flames and hot gases from moving vertically between floors, which both protects occupants and aids firefighting operations.

Other options involve openings, equipment, or storage rather than a barrier that separates areas, so they don’t illustrate the area-separation role of fire barriers as clearly.