Two layers of 5/8” (15.9 mm) ToughRock® Fireguard X® Products or 5/8” (15.9 mm) DensArmor Plus® Fireguard® gypsum panels screw-attached to 1-5/8” (41 mm) steel studs located at each corner of W10 x 49 (metric W250 x 73) column with 1” (25 mm) Type S screws 24” (610 mm) o.c. for base layer and 1-5/8” (41 mm) Type S drywall screws 12” (305 mm) o.c. for face layer. 1-1/4” (32 mm) steel beads at corners attached with 6d coated nails 1-3/4” (45 mm) long, 0.0915” (2 mm) shank, 1/4” (6 mm) heads, 12” (305 mm) o.c.
