Which term describes materials used to prevent or limit fire spread within hollow spaces, penetrations, or crawl spaces?

Which term describes materials used to prevent or limit fire spread within hollow spaces, penetrations, or crawl spaces?

• A. Glued-Laminated Beam
• B. Assembly
• C. Means of egress
• D. Fire-Stop

Answer: (D)

Fire stop describes the materials and systems used to seal openings and voids so fire, smoke, and hot gases can’t easily spread through hollow spaces, penetrations, or crawl spaces. When pipes, ducts, cables, or gaps pass through fire-rated walls or floors, fire-stop products like intumescent sealants, cementitious mortars, mineral wool blocks, or firestop collars are installed to maintain the integrity of the enclosure. This helps keep compartments separate, preserving the fire resistance rating of assemblies and buying time for occupants to evacuate and for responders to act. The other terms aren’t about sealing passages in concealed spaces: a glued-laminated beam is a structural member, not a fire-stopping material; means of egress refers to the path occupants use to exit; and an assembly is a broader construction unit, not the specific materials used to block fire spread through voids.

Fire stop describes the materials and systems used to seal openings and voids so fire, smoke, and hot gases can’t easily spread through hollow spaces, penetrations, or crawl spaces. When pipes, ducts, cables, or gaps pass through fire-rated walls or floors, fire-stop products like intumescent sealants, cementitious mortars, mineral wool blocks, or firestop collars are installed to maintain the integrity of the enclosure. This helps keep compartments separate, preserving the fire resistance rating of assemblies and buying time for occupants to evacuate and for responders to act.

The other terms aren’t about sealing passages in concealed spaces: a glued-laminated beam is a structural member, not a fire-stopping material; means of egress refers to the path occupants use to exit; and an assembly is a broader construction unit, not the specific materials used to block fire spread through voids.