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. U350

September 25, 2018

Bearing Wall Rating — 2 Hr

Finish Rating — 23 min

STC Ratings — 61, 56 (See Items 2, 2A, 7, 7A)

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.

CONFIGURATION A
    1. Wood Studs — Double row of nom 2 by 4 in., spaced 16 in. OC with two 2 by 4 top and one 2 by 4 bottom plates. As an option, nom 2 in. by 6 in.., spaced 24 in.. OC with two 2 in. by 6 in. top and one 2 in. by 6 in. bottom plates may be used in lieu of 2 in. by 4 in. studs and plates. Studs effectively fire stopped. Opposite stud rows spaced 1 in. apart.
    2. Batts and Blankets* — Used to achieve the STC Ratings - Faced or unfaced mineral fiber insulation, 3-1/2 in. thick, nom 3.0 pcf, pressure fit in the wall cavity between stud, plates, and cross bracing

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

    2A. Glass Fiber Insulation — (As an alternate to Item 2, not for use with STC Ratings) — Faced or unfaced glass fiber batts 3-1/2 in. thick, nom 0.25 pcf, pressure fit in the wall cavity between stud, plates, and cross bracing may be used. If 2 by 6 in. studs (Item 1) are used, min. 5-1/2 in. of unfaced glass fiber batts, nom 0.25 pcf, pressure fit in the wall cavity between stud, plates, and cross bracing. Insulation may be applied in multiple layers to achieve final thickness.

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

    2B. Loose Fill Materials — (As an alternate to Item 2A, not for use with STC Ratings) — Blown-in fiberglass loose-fill insulation material. The insulation is applied in a dry state to completely fill the enclosed cavity with a minimum density of 0.25 pcf.
    2C. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 2, not for use with STC Ratings) — (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.


    2D. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 2, not for use with STC Ratings) - 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. The minimum dry density shall be 4.30 lbs/ft3.

    INTERNATIONAL CELLULOSE CORPCelbar-RL


    2E. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 2, not for use with STC Ratings) — Spray applied cellulose 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 INCCellulose Insulation


    3. Building Units* — Building units placed with the laminate face against, and nailed to the wood framing with 1-7/8 in. long, 6d nails, spaced 6 in. OC. on the perimeter and 12 in. OC. in the field.

    LOUISIANA-PACIFIC CORPType Blazeguard 1-Side


    LOUISIANA-PACIFIC CORPType LP FlameBlock 1-Side


    4. Gypsum Board* — Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. Nom. 5/8 in. thick, 4 ft. wide board, applied vertically over building units (Item 3) or attached directly to the wood studs (Configuration B) with joints staggered from joints of building units and nailed to studs and bearing plates through the building units 8 in. OC. with 8d cement coated nails, 2-3/8 in. long, 0.113 in. shank diam. and 9/32 in. diam. head. When constructing Configuration B, 1-7/8 in. long, 8d cement coated nails spaced 8 in. OC. shall be used to fasten the gypsum board directly to the wood studs. When Item 6, resilient channels are used, gypsum panels applied vertically and screw attached with 1 in. long, self-drilling, self-tapping Type S or S-12 steel screws spaced 8 in. OC.

    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


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


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


    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


    GEORGIA-PACIFIC GYPSUM L L C (View Classification)CKNX.R6937


    THAI GYPSUM PRODUCTS PCL (View Classification)CKNX.R27517


    UNITED STATES GYPSUM CO (View Classification)CKNX.R1319


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


    5. Joints and Nailheads — Gypsum board joints covered with tape and joint compound. Nail heads covered with joint compound.
    6. Resilient Channel — Optional - Not Shown - For use with gypsum boards in Configuration B, 25 MSG galv steel, spaced vertically 24 in. OC, flange portion screw attached to one side of studs with 1-1/4 in. long diamond shaped point, double lead Phillips head steel screws.
    7. STC Rating — The STC Rating of Configuration A is 61 when it is constructed as described by Items 1 through 5, except:
      A. Item 1, above - Wood Studs - Studs in opposite rows shall be staggered 8 in. OC.
      B. Item 4, above - Gypsum Board - Min. weight 2.0 psf.
    7A. STC Rating — The STC Rating of Configuration B is 56 when it is constructed as described by Items 1 through 6, except:
      A. Item 1, above - Wood Studs - Studs in opposite rows shall be staggered 8 in. OC.
      B. Item 4, above - Gypsum Board - Min. weight 2.0 psf.
      C. Item 6, above - Resilient Channels - The gypsum board shall be attached to the studs with resilient channels.

    * 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 2018-09-25
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