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Reference:
UL Design U302
Exterior Wall Fire-Rated System
2-Hour Fire-Resistance Rating
Cavity thickness..........89 mm (3-1/2")
Wall thickness.............254 mm (10")
Interior
Apply a base layer of 15.9 mm (5/8") ProRoc™ Type X gypsum board vertically or horizontally with 48 mm (1-7/8") nails spaced 200 mm (8") o.c. Vertical joints must be located over framing members.
Apply a face layer of 15.9 mm (5/8") ProRoc™ Type X gypsum board vertically or horizontally to the interior side with 60 mm (2-3/8") nails spaced 200 mm (8") o.c. Joints must be offset from joints in the underlying layer. Tape and finish joints.
Exterior
Apply one layer of 12.7 mm (1/2") GlasRoc® Sheathing horizontally to the exterior side with 44 mm (1-3/4") roofing nails spaced 150 mm (6") o.c. Vertical joints must be located over framing members and staggered.
Additional UL Design Listings for Wood Stud Systems:
U322, U323, U324, U325, U326, U329, U330, U332, U337, U338, U339, U341, U342, U354, U355, U357, U358, U360.
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