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BXUV.U404 - Fire Resistance Ratings - ANSI/UL 4bJ ragc .3 01
<br /> 3. CementitioUa Backer Units"' — 1/2 In. or 5/8 in. thick, applied vertically or horizontally with vertical joints centered
<br /> over studs. Fastened to studs and runners with corrosion resistant, Chamfered, ribbed wafer head screws with a minimum
<br /> head diameter of .400 inch. For nonbearing systems, fastened to studs and bottom runners with the uppermost screws
<br /> placed 1/2 in. to 2 In. below the bottom edge of the leg of the top runner. Horizontal joints need not be backed by framing.
<br /> 1 Hr System - Screws shall be min 1 -1/4 in. long and spaced a max of 8 in. OC. Alt vertical joints staggered one stud
<br /> cavity from gypsum board vertical joints on the opposite side of studs. Horizontal edge joints and horizontal butt joints on
<br /> opposite sides of studs need not be staggered. 2 -Hr System - For the base layer in Configuration B, the screws shell be
<br /> min 1.1/4 In. long and spaced a may of 12 in. OC. For the face layers, screws shall be 1 -5/8 in. long and spaced a max of 8
<br /> In. OC. All race layer joints offset min 12 in. from underlying base layer Joints. )olnts in either layer need not be staggered
<br /> from joints oh the opposite side of the wail.
<br /> UNITED STATES GYPSUM CO — DUROCK Exterior Cement Board, or DUROCK Brand Cement Board.
<br /> 4. Batts and Blankets" — Min 3 in. thick miner!! wool insulation batts, friction fitted between studs .
<br /> THERMAFIBER INC — Type SAFB.
<br /> 5. Gypsum Boards -- 5/8 In. thick, with square or tapered edges, applied vertically Or horizontally with vertical joints
<br /> centered over studs. Horizontal joints need not be backed by framing. Fastened with Type 5 -12 screws. 1 -Hr System - For
<br /> vertical application, fastened to studs and runners with 1 in. long screws spaced max 8 In. OC at vertical edges and spaced
<br /> max 12 in. OC In the field. For horizontal application, fastened to studs and runners with 1 In. long screws spaced max 8 In.
<br /> OC. Vertical joints staggered one stud cavity from cement board vertical Joints on opposite side of studs. Horizontal edge
<br /> Joints and horizontal butt joints on opposite sides of studs need not be staggered. 2 -Hr System - Base layer with an
<br /> overlying gypsum board face layer, fastened with 1 In, long screws spaced max 16 In. OC to studs and runners. Base layer
<br /> with an overlying cement board face layer, fastened with 1 In. long screws spaced max 12 in. OC to studs and runners.
<br /> Face layers fastened with 1 -5/8 In. long screws spaced max 16 In. OC to studs and runners with screws offset 8 in. from
<br /> face layer screws. Face layer joints offset min 12 in. from base layer joints. Joints In either layer need not be staggered
<br /> from joints on the opposite side of the wall. When used in widths other than 413 in., gypsum panels to be Installed
<br /> horizontally.
<br /> CANADIAN GYPSUM COMPANY — Types AR, C, IP -AR, IP -X1, IP -X2, IPC -AR, SCX, SHX, WRC or WRX.
<br /> UNITED STATES GYPSUM CO — Type AR, C, fRX -G, IP -AR, IP -X1, IP -X2, IPC -AR, SCX, SHX, WRC, WRX, USGX (Joint
<br /> tape and compound, Items 6 and 7, optional for use with Type USGX)
<br /> USG MEXICO 15 A DE C V — Types AR, C, IP-AR, IP -X1, IP -X2, IPC -AR, SCX, SHX, WRC, WRX.
<br /> SA. Gypsum Board* — (As an alternate to Ram 5 may be used as the base layer on one or both Sides of wall, For direct
<br /> attachment only) - Nom 5/8 in. thick lead backed gypsum panels with beveled, square or tapered edges, applied vertically.
<br /> Vertical joints centered over studs and staggered min 1 stud cavity on opposite sides of studs. Wallboard secured to studs
<br /> with 1-1/4 in. lohg Type S -12 steel screws spaced 8 in. OC at perimeter and 12 in. OC in the field.
<br /> RAY -BAR ENGINEERING CORP — Type R8 -LBG
<br /> 5B. Gypsum Board" — (As an alternate to Rem 5 or SA may be used as Inc base layer on one or both sides of wall, For
<br /> direct attachment only). Nominal 5/8 In. thick lead backed gypsum panels with beveled, square or tapered edges, applied
<br /> vertically. Vertical joints centered over studs end staggered min 1 stud cavity on opposite sides of studs. Wallboard secured
<br /> to studs with 1 -1/4 In, long Type S -12 (or #6 by 1-1 /4 in. long bugle head fine driller) steel screws spaced 8 In. OC at
<br /> perimeter and 12 in. OC in the field.
<br /> NEW ENGLAND LEAD BURNING CO INC, DBA
<br /> NELCO — Nalco
<br /> 6. Joints — Covered with glass fiber mesh tape and latex modified Portland cement mortar or basecoat, or Type I organic
<br /> adhesive,
<br /> 7. Joints — When tapered edge gypsum board is used, face layer joints covered with Joint compound and paper tape. As
<br /> an alternate, gypsum veneer plaster may be applied to the entire surface of Classified veneer baseboard with joints
<br /> reinforced. When square -edge gypsum board is used, treatment orjolnts is optional.
<br /> 8. Vapor Retarder, Water serrier or Weather Resistive Barrier — (Optional — Not shown) — As required.
<br /> 9. Lead Batten Strips — (Not Shown, Por use With Item SA) - Lead Patten strips, min 1 -3/2 In. wide, max 10 ft long with
<br /> a max thickness of 0.125 ih. Strips placed on Inc interior face of studs and attached from the exterior face of the stud with
<br /> two 1 in. long Type 5 -12 pan head steel screws, one at the top of Inc strip and one at the bottom orthe strip. Lead batten
<br /> strips to have a purity of 99.9% meeting the Federal specification QQ- L -201f, Grade "C ". Lead batten strips required behind
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