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BXUV.U419 - Fire Resistance Ratings - ANSI/LTL 263 Page 7 of 9
<br /> USG MEXICO S A DE C V— 1/2 in. thick Type C, IP-X2, IPC-AR or; 5/8 in thick Type AR, C, IP-AR, IP-X1, IP-X2, IPC-AR,
<br /> SCX, SHX, or; 3/4 in. thick Types IP-X3 or ULTRACODE
<br /> 6. Fasteners —(Not shown) — For use with Items 2 and 2F - Type S or 5-12 steel screws used to attach panels to studs
<br /> (Item 2) or furring channels (Item 7) Single layer systems: 1 in. long for 1/2 and 5/8 in. thick panels or 1-1/4 in. long
<br /> for 3/4 in. thick panels, spaced 8 in. OC when panels are applied horizontally, or 8 in OC along vertical and bottom edges
<br /> and 12 in. OC in the field when panels are applied vertically. Two layer systems: First layer- 1 in. long for 1/2 and 5/8 in.
<br /> thick panels or 1-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC. Second layer- 1-5/8 in long for 1/2 in., 5/8 in
<br /> thick panels or 2-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC with screws offset 8 in. from first Iayer.Three-layer
<br /> systems: First layer- 1 in. long for 1/2 in., 5/8 in. thick panels, spaced 24 in. OC. Second layer- 1-5/8 in. long for 1/2 in.,
<br /> 5/8 in. thick panels, spaced 24 in. OC. Third layer- 2-1/4 in. long for 1/2 in., 5/8 in. thick panels or 2-5/8 in. long for 5/8
<br /> in thick panels, spaced 12 in. OC. Screws offset min 6 in. from layer below. Four-layer systems: First layer- 1 in. long for
<br /> 1/2 in., 5/8 in. thick panels, spaced 24 in OC. Second layer- 1-5/8 in. long for 1/2 in., 5/8 in. thick panels, spaced 24 in.
<br /> OC. Third layer- 2-1/4 in. long for 1/2 in. thick panels or 2-5/8 in. long for 5/8 in thick panels, spaced 24 in. OC. Fourth
<br /> layer- 2-5/8 in. long for 1/2 in thick panels or 3 in. long for 5/8 in thick panels, spaced 12 in. OC. Screws offset min 6 in.
<br /> from layer below
<br /> 6A. Fasteners —(Not shown) —For use with Item 2A - Type S or 5-12 steel screws used to attach paneis to studs (Item
<br /> 2A) Single layer systems: 1 in. long for 1/2 and 5/8 in. thick panels or 1-1/4 in long for 3/4 in. thick panels, spaced 8-
<br /> 1/2 in. OC with additional screws 1 in and 2-1/2 in. from edges of the board when panels are horizontally. or 8 in. OC
<br /> along vertical and bottom edges and 12 in. OC in the field when panels are applied vertically. Two layer systems applied
<br /> vertically: First layer- 1 in. long for 1/2 and 5/8 in thick panels or 1-1/4 in long for 3/4 in thick panels, spaced 16 in.
<br /> OC. Second layer- 1-5/8 in long for 1/2 in., 5/8 in. thick panels or 2-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC
<br /> with screws offset 8 in. from first layer. Two layer systems applied horizontally: First layer- 1 in. long for 1/2 and 5/8
<br /> in. thick panels or 1-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC starting 8 in from each edge of the board with
<br /> an additional screw placed 1-1/4 in. from each edge of the board. Second layer- 1-5/8 in. long for 1/2 in., 5/8 in thick
<br /> panels or 2-1/4 in. long for 3/4 i�, thick panels, spaced 16 in. OC starting 8 in. from each edge of the board with an
<br /> additional screw placed i-1/4 in from each edge of the board with screws offset 8 in. from first layer. Three-layer
<br /> systems: First layer- 1 in, long for 1/2 in., 5/8 in thick panels, spaced 24 in. OC. Second layer- 1-5/8 in. long for 1/2 in.,
<br /> S/8 in. thick panels, spaced 24 in. OC. Third layer- 2-1/4 in, long for 1/2 in., 5/8 in. thick panels or 2-5/8 in. long for 5/8
<br /> in. thick panels, spaced 12 in. OC. Screws offset min 6 in. from layer below. For all layers, an additional screw shall be
<br /> placed 1-1/4 in. from each edge of the board. Four-layer systems: First layer- 1 in long for 1/2 in., 5/8 in. thick panels,
<br /> spaced 24 in OC. Second layer- 1-5/8 in. long for 1/2 in , 5/8 in. thick panels, spaced 24 in OC. Third layer- 2-1/4 in. long
<br /> for 1/2 in thick panels or 2-5/8 in. long for 5/8 in. thick panels, spaced 24 in. OC. Fourth layer- 2-5/8 in. long for 1/2 in.
<br /> thick panels or 3 in long for 5/8 in thick panels, spaced 12 in. OC. Screws offset min 6 in. from layer below. For all layers,
<br /> an additional screw shall be placed 1-1/4 in. from each edge of the board
<br /> 7. Furring Channels —(Optional, not shown, for single or double layer systems) — Resilient furring channels fabricated
<br /> from min 25 MSG corrosion-protected steel, spaced vertically a max of 24 in. OC. Flange portion attached to each
<br /> intersecting stud with 1/2 in long Type 5-12 steel screws. Not for use with Item SA and SE.
<br /> 7A. Framing Members* —(NOt Shown) —(Optional on one or both sides, not shown, for single or double layer systems)
<br /> — As an alternate to Item 7, furring channels and Steel Framing Members as described below:
<br /> a. Furring Channels — Formed of No 25 MSG galv steel. 2-3/8 in wide by 7/8 in. deep, spaced
<br /> max. 24 in. OC perpendicular to studs. Channels secured to studs as described in Item b. Gypsum
<br /> board attached to furring channels as described in Item 6. Not for use with Item SA and SE.
<br /> b Steel Framing Members* — Used to attach furring channels (Item 7Aa) to studs (Item 2)
<br /> Clips spaced max. 48 in. OC. RSIC-1 clips secured to studs with No. 8 x 1-1/2 in. minimum self-
<br /> drilling, S-12 steel screw through the center grommet. RSIC-V clips secured to studs with No. 8 x
<br /> 9/16 in. minimum self-drilling, 5-12 steel screw through the center hole. Furring channels are
<br /> friction fitted into clips.
<br /> PAC INTERNATIONAL INC — Types RSIC-1, RSIC-V
<br /> 76. Framing Members* —(Optional, Not Shown) — As an alternate to Item 7, for single or double layer systems, furring
<br /> channels and Steel Framing Members on only one side of studs as described betow:
<br /> a. Furring Channels — Formed of No. 25 MSG galv steel, spaced 24 in OC perpendicular to studs.
<br /> Channels secured to studs as described in Item b. Batts and Blankets placed in stud cavity as
<br /> described in Item 5. Two layers of gypsum board attached to furring channels as described in Item
<br /> 5 Not for use with Item SA and SE.
<br /> b Steel Framing Members* — Used to attach furring channels (Item 7Ba) to one side of studs
<br /> (Item 2) only. Clips spaced 48 in. OC., and secured to studs with two No. 8 x 2-1/2 in, coarse
<br /> drywall screws, one through the hole at each end of the clip. Furring channels are friction fitted into
<br /> clips.
<br /> KINETICS NOISE CONTROL INC — Type Isomax
<br /> 7C. Framing Members* — Optional - Not Shown - Used as an alternate method to attach resilient channels (Item 7)
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