Which term describes spaces above ceilings requiring sprinkler installation?

Which term describes spaces above ceilings requiring sprinkler installation?

• A. Ceiling pockets
• B. Rooftop spaces
• C. Wall cavities
• D. Basement plenum

Answer: (A)

Ceiling pockets describe the cavities that exist between a finished ceiling and the actual structural ceiling or roof line. In NFPA 13R applications, these spaces are recognized as areas where heat and flames can quickly move between rooms, so sprinklers are installed to protect this ceiling void and ensure the water can reach the pocket effectively. The other terms refer to different spaces: rooftop spaces are attic or roof-void areas, wall cavities are voids inside walls, and a basement plenum is an air‑handling space in the basement.

Ceiling pockets describe the cavities that exist between a finished ceiling and the actual structural ceiling or roof line. In NFPA 13R applications, these spaces are recognized as areas where heat and flames can quickly move between rooms, so sprinklers are installed to protect this ceiling void and ensure the water can reach the pocket effectively. The other terms refer to different spaces: rooftop spaces are attic or roof-void areas, wall cavities are voids inside walls, and a basement plenum is an air‑handling space in the basement.