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. U395

September 18, 2015

Bearing wall rating — 1, 2 or 3 Hr (See Item 3)

Finish Rating — See Item 3

Load Restricted for 2 Hr and 3 Hr Ratings, See Item 3

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.

    1. Wood Studs — Double row of nominal 2 x 4 in. studs or nominal 2 x 6 in. studs, spaced 16 in. OC and cross-braced at mid-height. Opposite rows spaced 1 in. apart, staggered 8 in. OC and joined at the top and bottom with bearing plates.
    2. Bearing Plates — (Not Shown) — Nominal 2 x 4 in. or nominal 2 x 6 in. Two layers on top and one layer on bottom for each row of studs.
    3. Gypsum Board* —

    Gypsum Board Protection on Each Side of Wall



    Rating,
    Hr
    No. of
    Layers
    & Thkns
    of Panel


    Finish
    Rating
    Board
    Type and
    Method of
    Attachment
    Design Load Criteria+


    Braced At
    Midheight++


    Braced By
    Sheathing+++
    1 1 layer, 5/8 in. thick Not evaluated Item 3A 100% 100%
    2 1 layer, 5/8 in. thick 22 Min Item 3B 100% 75%
    3 2 layers, 5/8 in. thick Not evaluated Item 3C 75% N/A

    + Refer to General Information for Fire Resistance Ratings, Section VI. Wall and Partition Assemblies, 1. Wood Stud Walls.

    ++ Loads associated with these ratings are per the 2001 NDS Supplement, ASD Method, Wall Braced at Midheight.

    +++ Loads associated with these ratings are per the 2005 NDS Supplement, ASD Method, Wall Braced by Sheathing.

    3A. Gypsum Board* — For 1 Hr Rating. One layer of 4 ft wide, 5/8 in. thick gypsum board applied horizontally (backed by 2 x 4 in. wood framing) or vertically and nailed to studs and bearing plates 7 in. OC with 6d cement coated nails, 1-7/8 in. long, 0.0915 in. shank diameter and 1/4 in. diameter head. When gypsum board is applied vertically, joints to be centered over studs. When gypsum board is applied horizontally, vertical butt joints to be centered over the studs and horizontal joints to be backed by 2 x 4 in. wood framing. As an alternative, No. 6 bugle head drywall screws, 1-7/8 in. long may be substituted for the 6d cement coated nails.

    CGC INC — Types SCX or ULX


    GEORGIA-PACIFIC GYPSUM L L C — Type X


    UNITED STATES GYPSUM CO — Types SCX, ULIX or ULX


    USG BORAL DRYWALL SFZ LLC — Type SCX


    USG MEXICO S A DE C V — Types SCX or ULX


    3B. Gypsum Board* — For 2 Hr Rating. One layer of 4 ft wide, 5/8 in. thick gypsum board applied horizontally (backed by 2 x 4 in. wood framing) or vertically and nailed to studs and bearing plates 7 in. OC with 6d cement coated nails, 1-7/8 in. long, 0.0915 in. shank diameter and 1/4 in. diameter head. When gypsum board is applied vertically, joints to be centered over studs. When gypsum board is applied horizontally, vertical butt joints to be centered over the studs and horizontal joints to be backed by 2 x 4 in. wood framing. As an alternative, No. 6 bugle head drywall screws, 1-7/8 in. long may be substituted for the 6d cement coated nails.

    CGC INC — Type C


    GEORGIA-PACIFIC GYPSUM L L C — Type Type TG-C


    UNITED STATES GYPSUM CO — Type C


    USG BORAL DRYWALL SFZ LLC — Type C


    USG MEXICO S A DE C V — Type C


    3C. Gypsum Board* — For 3 Hr Rating. Two layers of 4 ft wide, 5/8 in. thick gypsum board applied vertically, with the first layer attached with 6d cement coated nails spaced 10 in. OC, and the second layer attached with 8d nails spaced 7 in. OC. Vertical joints between the first and second layer are to be staggered. As an alternative, the first layer of gypsum board may be applied horizontally (backed by 2 x 4 in. wood framing) and the second layer applied vertically. When gypsum board is applied vertically, joints to be centered over studs. When gypsum board is applied horizontally, vertical butt joints to be centered over the studs and horizontal joints to be backed by 2 x 4 in. wood framing.

    CGC INC — Type C


    GEORGIA-PACIFIC GYPSUM L L C — Type Type TG-C


    UNITED STATES GYPSUM CO — Type C


    USG BORAL DRYWALL SFZ LLC — Type C


    USG MEXICO S A DE C V — Type C


    4. Joints and Screwheads — (Not shown) — Gypsum board joints taped and both joints and nailheads covered with joint compound.
    5. Fiber, Sprayed* — Brown Colored Spray applied cellulose fiber. The fiber is applied with water to completely fill the enclosed 8 in. or 12 in. 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


    6. Mesh Netting — (Not shown) — Any thin, woven or non-woven fibrous netting material attached with staples to the outer face of one row of studs to facilitate the installation of the sprayed fiber from the opposite row.

    * 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 2015-09-18
BXUV.U395 U395 BXUV 979414001 DESIGN Active 20150918 20150918 846414005 299592001 730408054 P1802957 287840003 846414005 299592001 730408054 P1802957 287840003 846414005 299592001 730408054 P1802957 287840003 979414001

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