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. X526

December 26, 2018

Ratings — 1, 2, 3 and 4 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. Steel Column — Min sizes of W shape and tubular steel columns in the AISC Steel Construction Manual as shown under Item 2.
    2. 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. Nom 5/8 in. thick or 1/2 in. thick gypsum board. Min total thicknesses of layers in inches for the various ratings and min column sizes are as follows:
    W Shape Columns
    Min Column Size Rating Hr


    Dsg
    Outside
    Dimensions
    In.
    Flange
    Thkns
    In.
    Web
    Thkns
    In.

    In.2
    Area
    Total Thkns of
    Layers of Wallboard In.
    1 2 3 4
    W4x13 4-1/8x4 0.345 0.280 3.82 1 1-1/2 2-1/4
    W6x15.5 6x6 0.269 0.235 4.56 1 1-1/2 2-1/4 3-1/8
    W10x49 10x10 0.558 0.340 14.4 1/2 1-1/8 1-7/8 2-1/2

    Tubular Shape Columns
    Rating Hr
    Total Thkns of
    Min Column Size Layers of Wallboard In.


    Dsg
    Outside
    Dimensions
    In.

    Thkns
    In.


    In.2Area


    1


    2


    3


    4
    TS4X4X0.188 4X4 0.188 2.74 1 1-3/4 2-5/8 -
    TS4.5X4.5X0.250 4.5X4.5 0.25 3.84 5/8      
    TS8X8X0.250 8X8 0.250 7.48 5/8 1-1/2 2-1/2 -

    Applied in layers as shown in above illustration. Each layer held together with paper masking adhesive tape during erection to allow placement of succeeding layers.

    For column ratings of 2 hr or less, one layer of gypsum board may be applied to the outer surface of steel cover. Boards applied vertically, without horizontal joints, attached to cover with screws located 1 in. from the board edge and 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


    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)-eXP-C, 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


    2A. Gypsum Board* — As an alternate to Item 2, 3/4 in. thick applied as described in Item 2.

    CGC INCType IP-X3 or ULTRACODE


    UNITED STATES GYPSUM COType IP-X3 or ULTRACODE


    USG BORAL DRYWALL SFZ LLCType ULTRACODE


    USG MEXICO S A DE C VType IP-X3 or ULTRACODE


    2B. Gypsum Board* — (As an alternate to Items 2 and 2A) — Nominal 5/8 in. thick panels. One of the layers of Gypsum Board (Item 2) used to obtain the minimum required thickness in Item 2 may be substituted with one layer and secured as described in Item 2.

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


    2C. Wall and Partition Facings and Accessories* — (As an alternate to Items 2 through 2B) — Composite Gypsum Panel — Nominal 5/8 in. thick panels. One of the layers of Gypsum Board (Item 2) used to obtain the minimum required thickness in Item 2 may be substituted with one layer of composite gypsum panel and secured as described in Item 2.

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


    3. Steel Covers — For seamed joints — 0.024 in. min thickness (No. 24 MSG) uncoated, galv or stainless steel, for column ratings of 3 hr or less. For 4 hr ratings, only stainless steel cover to be used. Covers consist of two L-shaped sections with Snap-Lock or Pittsburgh sheet steel joints. Width to be determined on the basis of protection thickness and column size. Length of sections to provide 1/8 in. clearance per lineal foot of column length between cover and any restraint.

    For lapped joints — (Max ratings 2 hr) — No. 22 MSG (0.027 in. thick) uncoated or galv steel. Fasteners used at laps to be No. 8 by 1/2 in. steel sheet metal screws spaced a max of 12 in. O.C. Other details to be the same as those stated for seamed joints as shown above.

    4. Corner Bead — For columns with outer layer of wallboard attached to outside surface of metal cover, No. 28 MSG galv steel, 1-1/4 in. legs corner beads attached to wallboard with screws spaced 12 in. O.C.
    5. Screws — For columns with outer layer of wallboard attached to outside surface of metal cover, self-drilling Phillips bugle head, 1 in. long screws for 1/2 or 5/8 in. thick wallboard (1-1/4 in. long screws for 3/4 in. thick wallboard) are used to attach wallboard to steel cover, and corner bead to wallboard.
    6. Sodium Silicate Solution — (Not shown, optional) — Used to adhere one layer of wallboard to inside of steel cover prior to assembly.
    7. Finishing System — (Not shown) — Joint compound applied over corner beads to a thickness of 1/16in.

    * 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 2018-12-26
BXUV.X526 X526 BXUV 117111001 DESIGN Active 20181226 20181226 100562937 283066001 736720001 100219806 846414005 294450001 299592001 226521001 923830002 100046076 544217001 798029001 100584219 730408054 P1802957 287840003 846414005 730408054 P1802957 287840003 100046076 100046076

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