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BXUV.U419 - Fire Resistance Ratings - ANSI/UL 263 Page 5 of 9
<br /> Min Min No. of Min
<br /> Stud Stud Layers Thkns of
<br /> Depth, in. Depth, in. & Thkns Insulation
<br /> Rating, Hr Items 2, 2D, 2E, and 2G Item 2A of Panel (Item 4)
<br /> 1 3-1/2 3-5/8 1 layer, 5/8 in. thick Optional
<br /> 1 2-1/2 3-5/8 1 layer, 1/2 in. thick 1-1/2 in.
<br /> 1 1-5/8 3-5/8 1 layer, 3/4 in. thick Optional
<br /> 2 1-5/8 2-1/2 2 layers, i/2 in. thick Optional
<br /> 2 1-5/8 2-1/2 2 layers, 5/8 in. thick Optional
<br /> 2 3-1/2 3-5/8 1 layer, 3/4 in thick 3 in.
<br /> 3 1-5/8 2-1/2 3 layers, 1/2 in. thick Optional
<br /> 3 1-5/8 2-1/2 2 layers, 3/4 in. thick Optional
<br /> 3 1-5/8 2-1/2 3 layers, 5/8 in. thick Optional
<br /> 4 1-5/8 2-1/2 4 layers, 5/8 in. thick Optional
<br /> 4 1-5/8 2-1/2 4 layers, 1/2 in thick Optional
<br /> 4 2-1/2 2-1/2 2 layers, 3/4 in thick 2 in.
<br /> CANADIAN GYPSUM COMPANY — 1/2 in. thick Type C, IP-X2 or IPC-AR, WRC, 5/8 in. thick Type AR, C, IP-AR, IP-X1,
<br /> IP-X2, IPC-AR, SCX, SHX, WRX or WRC, 3/4 in. thick Types IP-X3 or ULTRACODE
<br /> UNITED STATES GYPSUM CO — 1/2 in. thick Type C, IP-X2, IPC-AR or WRC, 5/8 in. thick Type SCX, SHX, WRX, IP-X1,
<br /> AR, C, WRC, FRX-G, IP-AR, IP-X2, IPC-AR ; 3/4 in. thick Types IP-X3 or ULTRACODE
<br /> USG MEXICO 5 A DE C V— 1/2 in. thick Type C, IP-X2, IPC-AR or WRC; 5/8 in. thick Type AR, C, IP-AR, IP-X1, IP-X2,
<br /> IPC-AR, SCX, SHX, WRX, WRC or; 3/4 in. thick Types IP-X3 or ULTRACODE
<br /> When Item 78, Steel Framing Members*, is used, Nonbearing Wall Rating is limited to 1 Hr Min. stud depth is 3-1/2 in.,
<br /> min thickness of insulation (Item 4) is 3 m., and two layers of gypsum board panels (1/2 in. or 5/8 in thick) shall be
<br /> attached to furring channels as described in Item 6. One layer of gypsum board panels (1/2 in. or 5/8 in. thick) attached to
<br /> opposite side of stud without furring channels as described in Item 6.
<br /> SA. Gypsum Board* —(As an alternate to Item 5) — 5/8 in. thick, 24 to 54 in. wide, applied horizontally as the outer
<br /> layer to one side of the assembly. Secured as described in Item 6.
<br /> CANADIAN GYPSUM COMPANY — Type SHX.
<br /> UNITED STATES GYPSUM CO — Type FRX-G, SHX.
<br /> USG MEXICO S A DE C V— Type SHX.
<br /> SB. Gypsum Board* —(Not Shown) - As an alternate to Item 5 when used as the base layer on one or both sides of wall
<br /> when 5/8 in or �/a in. thick products are specified. For direct attachment only to steel studs Item 2B, (not to be used with
<br /> Item 3) - Nom 5/8 in. or �/a in. may be used as alternate to all 5/8 in. or �/a in. shown in Item 5, Wallboard Protection on
<br /> Each Side of Wall table Nom 5/8 in. or �/a in. thick lead backed gypsum panels with beveled, square or tapered edges,
<br /> applied vertically. Vertical joints centered over studs and staggered min 1 stud cavity on opposite sides of studs. Gypsum
<br /> board secured to 20 MSG steel studs Item 2B with 1-1/4 in. long Type 5-12 steel screws spaced 8 in. OC at perimeter and
<br /> 12 in. OC in the field. To be used with Lead Batten Strips (see Item 11) or Lead Discs or Tabs (see Item 12)
<br /> RAY-BAR ENGINEERING CORP — Type RB-LBG
<br /> 5C. Gypsum Board* —(FOr Use With Item 2C) Rating Limited to 1 Hour 5/8 in thick, 48 in. wide, Gypsum paneis with
<br /> beveled, square or tapered edges, applied vertically or horizontally. (Vertical Application) - The gypsum board is to be
<br /> installed on each side of the studs with 1 in long Type S coated steel screws spaced 8 in OC starting 4 in from the edge of
<br /> the board at the vertical edges and 12 in. OC starting 6 in. from the edge of the board at the center of each board. Gypsum
<br /> boards are to be secured to the top and bottom track with screws spaced 8 in. OC starting 4 in. from the board edge.
<br /> Fasteners shall not penetrate through both the stud and the track at the same time. Vertical joints are to be centered over
<br /> studs and staggered one stud cavity on opposite sides of studs. (Horizontal Application) - The gypsum board is to be
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