Which component is described as part of the approved perimeter fire containment system for a curtain wall at floor openings?

Which component is described as part of the approved perimeter fire containment system for a curtain wall at floor openings?

• A. Firestop spray and safing insulation at floor opening at curtain wall
• B. Provide curtain wall with insulated glazing
• C. Provide concrete slab on steel deck; 1-hour rated assembly
• D. Fire-rated insulation system and hold-off curtain wall with insulation hangars

Answer: (A)

The key requirement is sealing the gap around the curtain wall where it meets the floor opening to stop fire and smoke from moving through that opening. Firestop spray fills the voids in the opening, creating a continuous barrier, while safing insulation fills and stabilizes the surrounding area to maintain the thermal and fire-resistance integrity. Together, these elements form the approved perimeter fire containment system for a curtain wall at floor openings. The other options don’t address that specific containment around the opening: insulating glazing is about thermal performance of the glass itself, not sealing the opening; a 1-hour rated concrete slab assembly concerns the floor construction’s fire rating rather than the curtain wall opening; and a hold-off system with insulation hangars relates to installation clearance and insulation details, not the firestop containment at the opening.

The key requirement is sealing the gap around the curtain wall where it meets the floor opening to stop fire and smoke from moving through that opening. Firestop spray fills the voids in the opening, creating a continuous barrier, while safing insulation fills and stabilizes the surrounding area to maintain the thermal and fire-resistance integrity. Together, these elements form the approved perimeter fire containment system for a curtain wall at floor openings.

The other options don’t address that specific containment around the opening: insulating glazing is about thermal performance of the glass itself, not sealing the opening; a 1-hour rated concrete slab assembly concerns the floor construction’s fire rating rather than the curtain wall opening; and a hold-off system with insulation hangars relates to installation clearance and insulation details, not the firestop containment at the opening.