Which statements describe uses of firestopping products?

• A. Seal around conduit penetrations through floors
• B. Compartmentalize a room in a building
• C. Seal wall penetrations to maintain fire rating
• D. All of these

Answer: (D)

Firestopping products are used to preserve the fire resistance of barriers by sealing openings and joints where services pass through. When conduits thread through a floor, the gap around them must be filled with firestop material to keep the floor’s fire rating intact. Likewise, penetrations in fire-rated walls need to be sealed so flames and smoke can’t bypass the barrier and compromise the rating. By sealing these penetrations, firestopping supports the building’s ability to compartmentalize—restricting the spread of fire between different areas. Because each statement describes a real use of firestop materials, all of these describe valid applications.