FIRE-RESISTANCE DESIGN

Assembly Usage Disclaimer

BXUV - Fire Resistance Ratings - ANSI/UL 263 Certified for United States

BXUV7 - Fire Resistance Ratings - CAN/ULC-S101 Certified for Canada

See General Information for Fire-resistance Ratings - ANSI/UL 263 Certified for United States
Design Criteria and Allowable Variances

See General Information for Fire Resistance Ratings - CAN/ULC-S101 Certified for Canada
Design Criteria and Allowable Variances

Design No. U478

June 14, 2019

Nonbearing Wall Rating — 3 Hr.

* Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively.

    1. Studs — Channel-shaped, min 1-5/8 in. wide by 1-1/4 in. deep, with 5/16 in. folded back return flange legs. Fabricated from No. 25 MSG galv steel. Stud spacing not greater than 24 in. OC. Studs to be cut 1 in. less than assembly height.
    1A. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2A, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Studs cut 1 in. less in length than assembly height. Stud spacing not greater than 24 in. OC.

    CALIFORNIA EXPANDED METAL PRODUCTS COViper20™


    MARINO/WARE, DIV OF WARE INDUSTRIES INCViper20™


    FUSION BUILDING PRODUCTSViper20™


    IMPERIAL MANUFACTURING GROUP INCViper20™


    1B. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2B, proprietary channel shaped steel studs, 1-1/4 in. deep by 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Studs cut 1 in. less in length than assembly height.

    CLARKDIETRICH BUILDING SYSTEMSCD ProSTUD


    DMFCWBS L L CProSTUD


    MBA METAL FRAMINGProSTUD


    RAM SALES L L CRam ProTRAK


    STEEL STRUCTURAL PRODUCTS L L CTri-S ProSTUD


    1C. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2C, proprietary channel shaped steel studs, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Studs cut 1 in. less in length than assembly height. Stud spacing not greater than 24 in. OC.

    TELLING INDUSTRIES L L CViper20™


    1D. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2D, proprietary channel shaped steel studs, 1-1/4 in. deep by 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel. Studs cut 1 in. less in length than assembly height.

    TELLING INDUSTRIES L L CTRUE-STUD™


    1E. Framing Members* — Steel Studs — As an alternate to Item 1 — For use with Item 2A (3-5/8 in. wide track), channel shaped studs, fabricated from min 25 MSG corrosion-protected steel, 1-1/4 in. wide by 3-5/8 in. deep, spaced a max of 24 in. OC. Studs to be cut 3/8 to 3/4 in. less than assembly height.

    MARINO/WARE, DIV OF WARE INDUSTRIES INCStudRite™


    1F. Framing Members* — Steel Studs — Not Shown — In lieu of Item 1 — For use with Item 2E, proprietary channel shaped steel studs, 1-1/4 in. deep by 3-1/2 in. wide fabricated from min 0.018 in. thick galv steel. Studs cut 1 in. less in length than assembly height.

    STEEL INVESTMENT GROUP L L CAlphaSTUD


    2. Floor and Ceiling Runners — Channel-spaced runners, min 1-5/8 in. wide by 1-1/4 in. deep, fabricated from No. 25 MSG galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC, max.
    2A. Framing Members* — Floor and Ceiling Runner — Not Shown — In lieu of Item 2 — For use with Item 1A, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    CALIFORNIA EXPANDED METAL PRODUCTS COViper20™ Track


    MARINO/WARE, DIV OF WARE INDUSTRIES INCViper20™ Track


    FUSION BUILDING PRODUCTSViper20™ Track


    IMPERIAL MANUFACTURING GROUP INCViper20™ Track


    2B. Framing Members* — Floor and Ceiling Runners — Not Shown — In lieu of Item 2 — For use with Item 1B, channel shaped runners, 1-1/4 in. deep by 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    CLARKDIETRICH BUILDING SYSTEMSCD ProTRAK


    DMFCWBS L L CProTRAK


    MBA METAL FRAMINGProTRAK


    RAM SALES L L CRam ProSTUD


    STEEL STRUCTURAL PRODUCTS L L CTri-S ProTRAK


    2C. Framing Members* — Floor and Ceiling Runner — Not Shown — In lieu of Item 2 — For use with Item 1C, proprietary channel shaped runners, 1-1/4 in. deep by min 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    TELLING INDUSTRIES L L CViper20™ Track


    2D. Framing Members* — Floor and Ceiling Runners — Not Shown — In lieu of Item 2 — For use with Item 1D, channel shaped runners, 1-1/4 in. deep by 1-5/8 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    TELLING INDUSTRIES L L CTRUE-TRACK™


    2E. Framing Members* — Floor and Ceiling Runners — Not Shown — In lieu of Item 2 — For use with Item 1F, channel shaped runners, 1-1/4 in. deep by 3-1/2 in. wide fabricated from min 0.018 in. thick galv steel, attached to floor and ceiling with fasteners spaced 24 in. OC max.

    STEEL INVESTMENT GROUP L L CAlphaTRAK


    3. Batts and Blankets* — (Optional) — Mineral wool insulation, partially or completely filling stud cavity.

    THERMAFIBER INCType SAFB.


    3A. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) — (100% Borate Formulation) — Spray applied cellulose material. The fiber is applied with water to completely fill the enclosed cavity in accordance with the application instructions supplied with the product with a nominal dry density of 2.7 lb/ft3. Alternate Application Method: The fiber is applied without water or adhesive at a nominal dry density of 3.5 lb/ft3, in accordance with the application instructions supplied with the product.

    U S GREENFIBER L L CINS735 & INS745 for use with wet or dry application. INS765LD and INS770LD are to be used for dry application only.


    3B. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) - Spray applied cellulose insulation material. The fiber is applied with water to interior surfaces in accordance with the application instructions supplied with the product. Applied to completely fill the enclosed cavity. Minimum dry density of 4.3 pounds per cubic ft.

    NU-WOOL CO INC Cellulose Insulation


    3C. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) — Spray applied cellulose fiber. The fiber is applied with water to completely fill the enclosed cavity in accordance with the application instructions supplied with the product. The minimum dry density shall be 4.30 lbs/ft3.

    INTERNATIONAL CELLULOSE CORPCelbar-RL


    3D. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 3) — Spray-applied cellulose material. The fiber is applied with water to completely fill the enclosed cavity in accordance with the application instructions supplied with the product. To facilitate the installation of the material, any thin, woven or non-woven netting may be attached by any means possible to the outer face the studs. The material shall reach equilibrium moisture content before the installation of materials on either face of the studs. The minimum dry density shall be 5.79 lbs/ft3.

    APPLEGATE HOLDINGS L L CApplegate Advanced Stabilized Cellulose Insulation


    4. Gypsum Board* — 1/2 in. thick, 4 ft wide with square or tapered edges. Inner layers to be applied vertically with joints centered over studs. Outer layer may be applied vertically or horizontally. First layer fastened to each stud with 1 in. long, Type S, self-tapping steel screws. Second layer fastened to each stud through the first layer with 1-5/8 in. long, Type S, self-tapping steel screws. Third layer fastened to each stud through the first and second layers with 2-1/4 in. long, Type S, self-tapping steel screws. First and second layer screws shall be located 4 and 3 in. from top and bottom of wall, respectively, with a max spacing of 48 in. OC vertically.

    The third layer screws shall be located 2 in. from top and bottom of wall with a max spacing of 12 in. OC vertically. If each third layer board is installed horizontally, board end shall be centered over and secured to the stud with Type S, self-tapping steel screws spaced 1/2 in. from end joint and 12 in. OC vertically. Also secured to the first and the second layers with 1-1/2 in. long, Type G, self-tapping steel screws located midway between studs and 1 in. from the horizontal joint. Board end joints shall be staggered. Vertical board joints to be staggered from the joints in the adjacent layer and on opposite sides of studs.

    CABOT MANUFACTURING ULCType C.


    AMERICAN GYPSUM COTypes AG-C.


    CERTAINTEED GYPSUM INCType C.


    CGC INCTypes C, IP-X2, IPC-AR.


    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L CType LGFC-C/A.


    GEORGIA-PACIFIC GYPSUM L L CTypes 5, DAPC, TG-C.


    NATIONAL GYPSUM COTypes eXP-C, FSK-C, FSW-C, FSMR-C.


    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUMType PG-C.


    PANEL REY S A Type PRC


    SAINT-GOBAIN GYPROC MIDDLE EAST FZEType Gyproc FireStop, Gyproc FireStop MR, Gyproc FireStop M2TECH, Gyproc FireStop ACTIV'Air, Gyproc FireStop MR ACTIV'Air, Gyproc FireStop M2TECH ACTIV'Air


    THAI GYPSUM PRODUCTS PCLType C.


    UNITED STATES GYPSUM COTypes C, IP-X2, IPC-AR.


    USG BORAL DRYWALL SFZ LLCType C


    USG MEXICO S A DE C VTypes C, IP-X2, IPC-AR.


    4A. Gypsum Board* — (As an alternate to Item 4) — 5/8 in. thick. Installed as described in Item 4, except the third layer Type G screws shall be 1-7/8 in. long.

    NATIONAL GYPSUM CO Type FSMR-C.


    UNITED STATES GYPSUM COType ULIX


    5. Cementitious Backer Units* — Board 1/2 or 5/8 in. thick, square edge, attached to studs with 2-1/4 in. long, Type S, corrosion resistant wafer head steel screws spaced 6 in. OC, joints covered with glass fiber mesh tape. Alternate board attachment for 20 gauge or heavier studs, 2-1/4 in. long, Type S-12, corrosion resistant steel screws spaced 8 in. OC, joints covered with glass fiber mesh tape.

    UNITED STATES GYPSUM COType DCB


    6. Joint Tape and Compound — Vinyl or casein, dry or premixed joint compound applied in two coats to joints and screw heads. Paper tape, 2 in. wide, embedded in first layer of compound over all joints.

    * Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively.

Last Updated on 2019-06-14
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