Base Layer: 1/2” (12.7 mm) ToughRock® Fireguard C® or 1/2” (12.7 mm) DensArmor Plus® Fireguard C® gypsum panels applied vertically to each side of 1-5/8” (41 mm) steel studs 24” (610 mm) o.c. with 1” (25 mm) Type S drywall screws 24” (610 mm) o.c. Face Layer: 1/2” (12.7 mm) ToughRock Fireguard C or 1/2” (12.7 mm) DensArmor Plus Fireguard C gypsum panels applied vertically to each side with 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. Joints staggered 24” (610 mm) each layer and side.
