Floor/Ceiling Wood-Framed

5/8” (15.9 mm) ToughRock® Fireguard C® gypsum board or 5/8” DensArmor Plus® Fireguard C® applied perpendicular to resilient channels 24” o.c. (610 mm) with 1” (25.4 mm) Type S drywall screws 12” (305 mm) o.c. Gypsum board end joints located midway between continuous channels and attached to additional pieces of channels 54” (1372 mm) long with screws 12” (305 mm) o.c. Resilient channels applied perpendicular to 2” x 10” wood joists 16” (406 mm) o.c. with 1-1/4” (32 mm) drywall screws. Wood joists supporting 5/8” (15.9 mm) interior plywood with exterior glue subfloor and 1-5/8” (41.3 mm) perlite-sand concrete reinforced with No. 19 SWG galvanized hexagonal wire mesh. 3” (76 mm) glass fiber insulation 0.90 pcf (14.4 kg/m3) in joist space stapled to subfloor.

Hourly Rating: 1-hour
STC Rating: 50-54 STC and 74 IIC
Fire Test Reference: UL L516, cUL L516
Sound Test Reference: KAL L224 27-65
Approved for Assembly:
ToughRock® Fireguard C® Products
DensArmor Plus® Fireguard C® Products