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. U338

June 14, 2019

Nonbearing or Bearing Wall Rating — 1 HR.

(See Items 2 and 2A)

Finish Rating — One Layer of Wallboard — Min. 20 Min.

Two Layers of Wallboard — Min. 59 Min

This design was evaluated using a load design method other than the Limit States Design Method (e.g., Working Stress Design Method). For jurisdictions employing the Limit States Design Method, such as Canada, a load restriction factor shall be used — See Guide BXUV or BXUV7

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

    HORIZONTAL SECTION
    1. Wood Studs — Nom 2 by 3 or 2 by 4 in., flat wise, spaced 24 in. O.C. max, effectively firestopped.
    2. Gypsum Board* — Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. For Nonbearing Wall rating — One layer of 5/8 in. thick, gypsum board secured to each side of studs. Gypsum board applied horizontally or vertically, unless specified below, with vertical joints centered on studs, and nailed to studs and bearing plates 7 in. O.C. with 6d cement coated nails, 1-7/8 in. long, 0.0915 in. shank diam and 1/4 in. diam head. As an alternate, No. 6 bugle head drywall screws, 1-7/8 in. long, may be substituted for the 6d cement coated nails.

    When used in widths other than 48 in., gypsum board to be installed horizontally.

    CABOT MANUFACTURING ULC (View Classification)CKNX.R25370


    AMERICAN GYPSUM CO (View Classification)CKNX.R14196


    BEIJING NEW BUILDING MATERIALS PUBLIC LTD CO (View Classification)CKNX.R19374


    CERTAINTEED GYPSUM INC (View Classification)CKNX.R3660


    CGC INC (View Classification)CKNX.R19751


    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L C (View Classification)CKNX.R18482


    GEORGIA-PACIFIC GYPSUM L L C (View Classification)CKNX.R2717


    LOADMASTER SYSTEMS INC (View Classification)CKNX.R11809


    NATIONAL GYPSUM CO (View Classification)CKNX.R3501


    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUM (View Classification)CKNX.R7094


    PANEL REY S A (View Classification)CKNX.R21796


    SIAM GYPSUM INDUSTRY (SARABURI) CO LTD (View Classification)CKNX.R19262


    THAI GYPSUM PRODUCTS PCL (View Classification)CKNX.R27517


    UNITED STATES GYPSUM CO (View Classification)CKNX.R1319


    USG BORAL DRYWALL SFZ LLC (View Classification)CKNX.R38438


    USG BORAL DRYWALL SFZ LLC (View Classification)CKNX.R38438


    USG MEXICO S A DE C V (View Classification)CKNX.R16089


    2A. Gypsum Board* — Same as Item 2. For Bearing Wall rating — Additional layer of 5/8 in. thick, 4 ft wide wallboard each side of studs. Attached to studs over inner layer 8 in. O.C. max, with 8d cement coated nails, 2-3/8 in. long, 0.113 in. shank diam and 9/32 in. diam head.
    2B. Gypsum Board* — (As an alternate to Item 2, not shown) - For Nonbearing Wall rating - Any 5/8 in. thick gypsum panels that are eligible for use in Design Nos. L501, G512 or U305, supplied by the Classified companies listed below shown in the Gypsum Board* (CKNX) category. Applied horizontally or vertically and attached to studs and bearing plates with 1-1/4 in. long Type W coarse thread gypsum panel steel screws spaced a max 8 in. OC, with last screw 1 in. from edge of board. When used in widths other than 48 in., gypsum board to be installed horizontally.

    CGC INC

    UNITED STATES GYPSUM CO

    USG BORAL DRYWALL SFZ LLC

    USG MEXICO S A DE C V

    2C. Gypsum Board* — Same as Item 2B. For Bearing Wall rating — Additional layer of 5/8 in. thick, 4 ft wide wallboard each side of assembly. Attached to studs over inner layer 8 in. O.C. max with 1-7/8 in. long Type W coarse thread gypsum panel steel screws.

    CGC INC

    UNITED STATES GYPSUM CO

    USG BORAL DRYWALL SFZ LLC

    USG MEXICO S A DE C V

    2D. Gypsum Board* — (As an alternate to Item 2, not shown) - For Nonbearing Wall rating - 5/8 in. thick gypsum panels applied horizontally or vertically and attached to studs and bearing plates with 1-1/4 in. long Type W coarse thread gypsum panel steel screws spaced a max 8 in. OC, with last screw 1 in. from edge of board. When used in widths other than 48 in., gypsum board to be installed horizontally.

    CABOT MANUFACTURING ULCType X, 5/8 Type X


    AMERICAN GYPSUM CO Types AGX-1, M-Glass, AG-C, LightRoc


    CERTAINTEED GYPSUM INCType C, Type X, Type X-1, or Type SilentFX


    GEORGIA-PACIFIC GYPSUM L L CType TG-C


    NATIONAL GYPSUM COType FSK, Type FSK-G, Type FSW, Type FSW-3, Type FSW-5, Type FSW-G, Type FSK-C, Type FSW-C, Type FSMR-C, Type FSW-6, Type FSL


    THAI GYPSUM PRODUCTS PCLType C or Type X


    2E. Gypsum Board* — Same as Item 2D. For Bearing Wall rating — Additional layer of 5/8 in. thick, 4 ft wide wallboard each side of assembly. Attached to studs over inner layer 8 in. O.C. max with 1-7/8 in. long Type W coarse thread gypsum panel steel screws.

    CABOT MANUFACTURING ULCType X


    AMERICAN GYPSUM CO Types AGX-1, M-Glass, AG-C, LightRoc


    CERTAINTEED GYPSUM INCType C, Type X, Type X-1


    GEORGIA-PACIFIC GYPSUM L L CType TG-C


    THAI GYPSUM PRODUCTS PCLType C or Type X


    2F. Gypsum Board* — (As an alternate to Item 2, not shown) - For Nonbearing Wall rating - 5/8 in. thick gypsum panels, with square edges, applied either horizontally or vertically. Gypsum panels fastened to framing with 1-1/4 in. long Type W coarse thread gypsum panel steel screws spaced a max 8 in. OC, with last 2 screws 1 and 4 in. from edge of board or nailed as described in Item 3. When used in widths of other than 48 in., gypsum boards are to be installed horizontally.

    GEORGIA-PACIFIC GYPSUM L L CGreenGlass Type X, Type DGG.


    2G. Gypsum Board* — Same as Item 2F. For Bearing Wall rating — Additional layer of 5/8 in. thick, 4 ft wide wallboard each side of assembly. Attached to studs over inner layer 8 in. O.C. max with 1-7/8 in. long Type W coarse thread gypsum panel steel screws.

    GEORGIA-PACIFIC GYPSUM L L C GreenGlass Type X, Type DGG.


    2H. Gypsum Board* — (As an alternate to Items 2 through 2H) - 5/8 in. thick, 4 ft. wide, paper surfaced applied vertically only and secured as described in Item 2.

    CERTAINTEED GYPSUM INCType SilentFX


    GEORGIA-PACIFIC GYPSUM L L CType X ComfortGuard Sound Deadening Gypsum Board.


    NATIONAL GYPSUM COSoundBreak XP Type X Gypsum Board


    2I. Gypsum Board* — (As an alternate to Items 2 through 2H) — Nominal 5/8 in. thick, 4 ft wide panels, applied vertically and secured as described in Item 2 or 2A.

    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUMType QuietRock ES


    2J. Wall and Partition Facings and Accessories* — (As an alternate to Items 2 through 2I) — Nominal 5/8 in. thick, 4 ft wide panels, applied vertically and secured as described in Item 2 or 2A.

    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUMType QuietRock 527


    2K. Gypsum Board* — (As an alternate to 5/8 in. Type FSW in Item 2) -- 2 layers nom. 5/16 in. thick gypsum panels applied vertically or horizontally. Horizontal joints on the same side need not be staggered. Inner layer attached with fasteners, as described in item 2, spaced 24 in. OC. Outer layer attached per Item 2.

    NATIONAL GYPSUM COType FSW


    2L. Gypsum Board* — (As an alternate to Item 2) — 5/8 in. thick gypsum panels, with beveled, square, or tapered edges, applied either horizontally or vertically. Gypsum panels fastened to framing with 1-1/4 in. long Type W coarse thread gypsum panel steel screws spaced a maximum 10 in. OC with the last two screws 4 and 1 in. from the edges of the board. When used in widths other than 48 in., gypsum panels are to be installed horizontally.

    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L CType LGFC6A (finish rating 21 min), Type LGFC2A, Type LGFC-C/A, Type LGFC-WD, Type LGLLX


    3. Joints and Nail Heads — Gypsum board joints of outer layer covered with paper tape and joint compound. Nail heads of outer layer covered with joint compound. As an alternate, nom 3/32 in. thick gypsum veneer plaster may be applied to the entire surface of Classified veneer baseboard with joints reinforced with paper tape.
    4. Batts and Blankets* — (Optional) — Max 1 in. thickness glass or mineral fiber batt insulation.

    See Batts and Blankets* (BZJZ) category for names of Classified companies.

    4A. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 4) — 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. INS510LD, INS515LD, INS541LD, INS735, INS745, INS765LD, and INS770LD are to be used for dry application only.


    4B. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 4) - 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


    4C. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 4) - 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


    4D. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 4) - 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


    * 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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