What term describes a complete, tested assembly that prevents the passage of flames, smoke, and toxic gases through penetrations in fire-rated walls and floors for a specified period?

What term describes a complete, tested assembly that prevents the passage of flames, smoke, and toxic gases through penetrations in fire-rated walls and floors for a specified period?

• A. Firestop System
• B. Fire Wall
• C. Hard Wall System
• D. Flex Duct

Answer: (A)

Firestop system is the term for the complete, tested assembly that seals penetrations in fire-rated walls and floors to block flames, smoke, and toxic gases for a defined period. It isn’t just a sealant or a single material; it includes the penetrating item (such as a pipe or duct), the firestop material, any sleeves or collars, and the surrounding construction, all installed to a tested listing. When properly applied, this system preserves the fire-resistance rating of the wall or floor for the specified duration by preventing the fire from traveling through the opening. A fire wall refers to the barrier itself, not the sealing assembly around penetrations, and the other terms don’t describe the complete, tested penetrations protection described here.

Firestop system is the term for the complete, tested assembly that seals penetrations in fire-rated walls and floors to block flames, smoke, and toxic gases for a defined period. It isn’t just a sealant or a single material; it includes the penetrating item (such as a pipe or duct), the firestop material, any sleeves or collars, and the surrounding construction, all installed to a tested listing. When properly applied, this system preserves the fire-resistance rating of the wall or floor for the specified duration by preventing the fire from traveling through the opening. A fire wall refers to the barrier itself, not the sealing assembly around penetrations, and the other terms don’t describe the complete, tested penetrations protection described here.