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. V421

October 11, 2017

Nonbearing Wall Ratings — 1 & 2 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. Girts — "Z" or "C" shaped girts, 0.056 to 0.120 in. thick steel, 6 to 12 in. deep, with 2 to 4 in. wide flanges. Girts placed horizontally (with flanges up or down) and spaced max 48 in. OC. Girts are secured to columns with girt clips, Item 2, or bolted to the column through the girt flange.
    2. Girt Clips — (not shown) — Steel secured to column by welds or bolts.
    3. Steel Wall Panels — Min No. 26 MSG, min 16 in. wide coated steel panels. Panel joints offset 6 in. from gypsum sheathing joints. If one layer of exterior wallboard is used, panels are fastened to the horizontal girts with 1-1/2 in. (min) long No. 12-14 self-drilling screws 12 in. OC. If two layers of exterior wallboard are used, panels are fastened to the horizontal girts with 2 in. (min) long No. 12-14 self-drilling screws 12 in. OC. Vertical raised rib profiles of adjacent panels are overlapped approximately 3 in. and attached to each other with 7/8 in. long 1/4-14 (min) self-drilling screws (stitch screws) 24 in. OC (max) along the lap.
    3A. Steel Siding or Brick — (Optional, not shown) For Fire Resistance Ratings from inside of wall only, steel siding or brick veneer meeting the requirements of local code agencies, may be installed over additional furring channels (not shown), Item 4, on exterior of wall in place of steel wall panels. Brick veneer attached to furring channels with corrugated metal wall ties attached to each furring channel with steel screws, not more than each sixth course of brick. When a minimum 3-3/4 in. thick brick veneer facing is used, the fire resistance rating applies from either side of the wall.
    4. Furring Channels — Hat shaped, minimum 25 MSG galv steel, approximately 2-5/8 in wide, 7/8 in. deep, spaced 24 in. OC perpendicular to girts. Channels are secured to each girt with 3/8 in. (min) long self-drilling pan head sheet steel type screws. Two screws are used at each fastening location, one through each leg of the furring channel.
    5. Gypsum Board* — Any 1/2 in. thick UL Classified Gypsum Board that is eligible for use in Design No. X515. Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. See table under Item 6 for number of layers and thickness on interior face of wall. Any 5/8 in. or 1/2 in. thick gypsum board applied horizontally or vertically. First layer attached to furring channels, Item 4, using 1 in. long Type S bugle head gypsum board screws spaced 24 in. OC. vertically and horizontally. Second layer attached to furring channels using 1-5/8 in. long Type S bugle head gypsum board screws spaced 12 in. OC. vertically and 24 in. OC. horizontally. Third layer, when used, attached to furring channels using Type S bugle head gypsum board screws spaced 12 in. OC. vertically and 24 in. OC. horizontally, 1-7/8 in. long for 1/2 in. gypsum board and 2-1/4 in. long for 5/8 in. gypsum board. Fourth layer, when used, attached to steel strapping using 1 in. long (min) bugle head drywall screws spaced 8 in. OC. Steel strapping from flat stock, 1-1/2 in. wide, fabricated from 0.020 in. thick (25 gauge) galv steel. Steel strapping located vertically and attached to third layer of gypsum board at each vertical joint and intermediate stud using 2-5/8 in. Type S bugle head drywall screws 12 in. OC. The horizontal or vertical joints of the wallboard are offset 24 in. when 2 successive layers are applied in the same orientation.

    ACADIA DRYWALL SUPPLIES LTD (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 MEXICO S A DE C V (View Classification) — CKNX.R16089


    5A. Gypsum Board* — (As an alternate to Item 5) - Fastened as described in Item 5. 5/8 in. thick, 4 ft. wide, paper surfaced, applied vertically only.

    NATIONAL GYPSUM CO — SoundBreak XP Type X Gypsum Board


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

    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUM — Type QuietRock ES


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

    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUM — Type QuietRock 527


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

    NATIONAL GYPSUM CO — Type FSW


    6. Gypsum Board* — See following table for number of layers on exterior face of wall. Any exterior grade 5/8 in thick gypsum wallboard or gypsum sheathing applied horizontally or vertically. First layer attached to girts, Item 1, using 1-1/4 in. long (min) self-drilling bugle-head sheet steel type gypsum board screws spaced 8 in. OC. horizontally. Second layer, when used, attached to girts using 1-5/8 in. long (min) self-drilling bugle-head sheet steel type gypsum board screws spaced 8 in. OC horizontally. The horizontal or vertical joints of the gypsum board are offset 24 in. if 2 successive layers are applied in the same orientation.

    Fire Resistance from Both Sides of Wall




    Rating
    Layers 5/8 In.
    Gypsum Board
    (Item 5) on
    Interior Face
    Layers 5/8 In.
    Gypsum Board
    (Item 6) on
    Exterior Face
    1 1 1
    2 2 2
    2 3 1

    Fire Resistance from Inside of Wall Only




    Rating
    Layers 1/2 In.
    Gypsum Board
    (Item 5) on
    Interior Face
    Layers 5/8 In.
    Gypsum Board
    (Item 6) on
    Exterior Face
    1 3 0



    Rating
    Layers 5/8 In.
    Gypsum Board
    (Item 5) on
    Interior Face
    Layers 5/8 In.
    Gypsum Board
    (Item 6) on
    Exterior Face
    2 4 0

    Any 1/2 in. thick UL Classified Gypsum Board that is eligible for use in Design No. X515. Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. See Gypsum Board (CKNX) category for names of Classified companies.

    7. Column Protection — (not shown) — Horizontal wall girts, Item 1, are attached to vertical structural steel columns. See Column Design Nos. X524 and X530 for protection of columns.
    8. Batts and Blankets* — (optional, not shown) — Glass Fiber Batts placed in the cavities of exterior walls.

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

    8A. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 8) — (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 C — INS735 & INS745 for use with wet or dry application. INS765LD and INS770LD are to be used for dry application only.


    8B. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 8) and Item 8A - 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


    8C. Fiber, Sprayed* — As an alternate to Batts and Blankets (Item 8) - 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 CORP — Celbar-RL


    9. Joint Tape and Compound — (not shown, optional) — Vinyl or casein, dry or premixed joint compound applied in two coats to joints and screw heads of face layer of gypsum board. Paper or glass fiber tape 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 2017-10-11
BXUV.V421 V421 BXUV 882208001 DESIGN Active 20171011 20171011 100562937 283066001 736720001 100219806 846414005 294450001 299592001 226521001 923830002 100046076 544217001 798029001 100584219 730408054 P1802957 287840003 923830002 100046076 100046076 923830002 184866001 882208001 979414001

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