Reference: UL Design U465 Exterior Wall Fire-Rated System
1-Hour Fire-Resistance Rating Cavity thickness..........92 mm (3-5/8")
Wall thickness.............124 mm (4-7/8")
Weight............................29 kg/m2 (6 psf)
Interior Install insulation between studs. Apply one layer of 15.9 mm (5/8") ProRoc™ Type X gypsum board vertically to interior side with 25 mm (1") Type S steel screws spaced 200 mm (8") o.c. along edges, and 300 mm (12") o.c. in the field. Joints must be offset from joints on the opposite side. Tape and finish joints.
Exterior Apply one layer of 15.9 mm (5/8") GlasRoc® Sheathing Type X vertically to exterior side with 25 mm (1") screws spaced 200 mm (8") o.c. along edges, and 300 mm (12") o.c. in the field. Joints must be offset from joints on the opposite side.
