Floor/Ceiling Wood-Framed

Base Layer: 5/8” (15.9 mm) ToughRock Fireguard C gypsum board or 5/8” (15.9 mm) DensArmor Plus Fireguard C (UL L505 only) applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 2-1/2” (64 mm) 8d cement coated nails 7” (178 mm) o.c. Resilient channel 24” (610 mm) o.c. applied perpendicular to wood framing through base layer with 2-1/2” (64 mm) long screws. Double channel installed at face layer end joints. Face Layer: 5/8” (15.9 mm) ToughRock Fireguard C gypsum board applied or 5/8” (15.9 mm) DensArmor Plus Fireguard C (UL L505 only) applied perpendicular to resilient channels with 1” (25 mm) Type S screws 12” (305 mm) o.c. Wood joists supporting 1” (25.4 mm) nominal T&G wood subfloor and 1” (25 mm) nominal wood finish floor or 15/32” (11.9 mm) plywood subfloor and 19/32” (15.1 mm) plywood finish floor applied perpendicular to joists with joints staggered..

Hourly Rating: 2-hour
STC Rating:
Fire Test Reference: UL L505, ULC M503, cUL L505, GA FC 57242
Sound Test Reference:
Approved for Assembly:
ToughRock® Fireguard C® Products
DensArmor Plus® Fireguard C® Products