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. U485

April 16, 2019

Bearing Wall Rating — 1 Hr.

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. Steel Floor and Ceiling Tracks — (Not Shown) — Top and bottom tracks shall consist of steel members, min No. 20 MSG (0.0329 in., min bare metal thickness) steel or min No. 20 GSG (0.036 in. thick) galv steel or No. 20 MSG (0.033 in. thick) primed steel, that provides a sound structural connection between steel studs and to adjacent assemblies such as floors, ceilings, and/or other walls. Attached to floor and ceiling assemblies with steel fasteners spaced not greater than 24 in. OC.
    2. Steel Studs — Corrosion protected steel studs, min 3-1/2 in. wide, min. No. 20 MSG (0.0329 in., min bare metal thickness) steel or min No. 20 GSG (0.026 in. thick) galv steel or No. 20 MSG (0.33 in. thick) primed steel, cold formed, designed in accordance with the current edition of the Specification for the Design of Cold-Formed Steel Structural Members by the American Iron and Steel Institute. All design details enhancing the structural integrity of the wall assembly including the axial design load of the studs, shall be as specified by the steel stud designer and/or producer and shall meet the requirements of all applicable local code agencies. The max stud spacing of wall assemblies shall not exceed 16 in. OC. Studs attached to floor and ceiling tracks with 1/2 in. long Type S-12 steel screws on both sides of studs or by welded or bolted connections designed in accordance with the AISI specifications.
    3. Cementitious Backer Units* — Nom 1/2 or 5/8 in. thick boards with square edges attached to studs with 1-1/4 in. long, Type S-12, corrosion resistant, wafer-head steel screws, spaced 24 in. OC. Joints covered with glass fiber mesh tape.

    UNITED STATES GYPSUM COType DCB.


    4. Batts and Blankets* — Placed to fill interior of stud cavity, 3 in. min thickness.

    ROCKWOOLType AFB


    THERMAFIBER INCType SAFB, SAFB FF.


    5. Lateral Support Members — (Not shown) — Where required for lateral support of studs, support may be provided by means of steel straps, channels or other similar means as specified in the design of a particular steel stud wall system.
    6. Gypsum Board* — Nom 5/8 in. thick boards, applied vertically, attached to studs with 1-5/8 in. long Type S-12 steel screws, spaced 8 in. OC along the edges of the board and 12 in. OC in the field.

    ACADIA DRYWALL SUPPLIES LTD5/8 Type X, Type Blueglass Exterior Sheathing


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


    CERTAINTEED GYPSUM INCType C , Type EGRG, Type GlasRoc, GlasRoc-2,


    CGC INCType AR, C, IP-AR, IP-X2, IPC-AR, SCX, SHX, ULX, USGX, WRC, WRX.


    CONTINENTAL BUILDING PRODUCTS OPERATING CO, L L CType LGFC-C/A.


    GEORGIA-PACIFIC GYPSUM L L CTypes 5, DAPC, TG-C, Type X, Veneer Plaster Base - Type X, Water Rated - Type X, Sheathing - Type X, Soffit - Type X, GreenGlass Type X, Type X ComfortGuard Sound Deadening Gypsum Board, Type LWX, Veneer Plaster Base-Type LWX, Water Rated-Type LWX, Sheathing Type-LWX, Soffit-Type LWX, Type DGLW, Water Rated-Type DGLW, Sheathing Type- DGLW, Soffit-Type DGLW, Type LW2X, Veneer Plaster Base - Type LW2X, Water Rated - Type LW2X, Sheathing - Type LW2X, Soffit - Type LW2X, Type DGL2W, Water Rated - Type DGL2W, Sheathing - Type DGL2W, Type DGG, Type DAP, Type DS.


    NATIONAL GYPSUM CORiyadh, Saudi Arabia — Type FR, or WR.


    PABCO BUILDING PRODUCTS L L C, DBA PABCO GYPSUMTypes C, PG-11, PGS-WRS.


    THAI GYPSUM PRODUCTS PCLType C


    UNITED STATES GYPSUM COType AR, C, FRX-G, IP-AR, IP-X2, IPC-AR, SCX, SHX, ULIX, ULX, USGX, WRC, WRX. (When ULIX is used screw spacing adjusted to 8 in. OC max)


    USG BORAL DRYWALL SFZ LLCTypes C, SCX, USGX


    USG MEXICO S A DE C VType AR, C, IP-AR, IP-X2, IPC-AR, SCX, SHX, ULIX, ULX, USGX,WRC or WRX.


    6A. Gypsum Board* — (As an alternate to Item 6) — Nom 3/4 in. thick, installed as described in Item 6.

    CGC INCType AR, IP-AR or IP-X3.


    UNITED STATES GYPSUM COType AR, IP-AR or IP-X3.


    USG MEXICO S A DE C VType AR, IP-AR or IP-X3.


    6B. Gypsum Board* — (As an alternate to Items 6, 6A) — Nominal 5/8 in. thick, 4 ft wide panels, secured as described in Item 6.

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


    6C. Wall and Partition Facings and Accessories* — (As an alternate to Items 6, 6A, 6B) — Nominal 5/8 in. thick, 4 ft wide panels, secured as described in Item 6.

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


    7. Laminating Adhesive* — (Optional) — (Not Shown) — Used to bond inner layer of Mineral and Fiber Board (Item 3) to outer layers of Gypsum Board (Item 6). ANSI A136.1 Type 1 organic adhesive applied with 1/4 in. square notched trowel. See Adhesives (BYWR) in the Fire Resistance Directory or Adhesives (BJLZ) in the Building Materials Directory for names of Classified companies.

    * 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 2019-04-16
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