Resilient channels 24” o.c. attached horizontally on one side of 2” x 4” wood studs 24” o.c. with 1-1/4” Type S drywall screws. One layer 5/8” (15.9 mm) ToughRock® Fireguard X® or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum panels applied horizontally to channels with 1” Type S drywall screws 8” o.c. with vertical joints located mid way between studs. 3” mineral or glass fiber insulation in stud space. Opposite side: one layer 5/8” (15.9 mm) ToughRock® Fireguard X® Products or 5/8” (15.9 mm) DensArmor Plus Fireguard gypsum panels applied horizontally or vertically to studs with 6d cement coated nails, 1 7/8” long, 0.0915” shank, 15/64” heads, 7” o.c. Vertical joints staggered 24” on opposite sides. Sound Tested with 3-1/2” (89 mm) fiberglass insulation
