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. V432

July 12, 2018

(Exposed to Fire on Interior Face Only)

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 of wall assemblies 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) galvanized steel or No. 20 MSG (0.033 in. thick) primed steel, that provide a sound structural connection between steel studs, and to adjacent assemblies such as floor, ceiling, 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 (0.036 in. thick) galvanized steel or No. 20 MSG (0.033 in. thick) primed steel, cold formed, shall be 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 (AISI). All design details enhancing the structural integrity of the wall assembly including the axial design load of the studs, shall be 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 24 in. 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. 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.
    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 gypsum applied vertically with Type S-12 steel screws, spaced 8 in. OC at edges and joints and 12 in. OC at the field.

    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


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

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


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

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


    4C. Gypsum Board* — (As an alternate to 5/8 in. Type FSW in Item 4) — 2 layers nom. 5/16 in. thick gypsum panels applied vertically. Horizontal joints on the same side need not be staggered. Inner layer attached with fasteners, as described in item 4, spaced 24 in. OC. Outer layer attached per Item 4.

    NATIONAL GYPSUM CO — Type FSW


    5. Gypsum Board* — Nom. 5/8 in. thick gypsum sheathing applied vertically and attached to studs and runner tracks with 1 in. long Type S-12 bugle head screws spaced 12 in. OC (max) along studs and tracks.

      Any 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.

    6. Wood Structural Panel Sheathing — (Optional) — Min 7/16 in. thick, 4 ft wide wood structural panels, min grade "C-D" or "Sheathing" . Installed with long dimension of panel (strength axis) or face grain of plywood parallel with or perpendicular to studs. Vertical joints centered on studs. Horizontal joints backed with steel straps or channels (Item 3), min 1-1/2 in. wide by No. 20 GSG (0.036 in. thick) galvanized steel or No. 20 MSG (0.033 in. thick) primed steel, when specified in the design of a particular steel stud wall system. Sheathing attached over gypsum sheathing (Item 5) to studs and tracks with Type S-12 bugle head screws; or No. 8 self-drilling/tapping steel screws; or min 0.100 in. diam. Hardened steel nails with helical or knurled thread (min sheathing fastener length equivalent to total thickness of gypsum and wood structural panel sheathing and steel framing plus 1/4 in.). Sheathing fasteners spaced min 6 in. OC at perimeter of panels and 12 in. OC along interior studs.
    7. Exterior Facings — Installed in accordance with manufacturer's installation instructions and local building code requirements. One of the following exterior facings is to be applied over sheathing (Items 5 or 6 (if used)):
      A. Siding — Aluminum, steel or vinyl siding attached over sheathing to studs.
      B. Brick Veneer — Any type of nom 4 in. wide brick veneer. When brick veneer is used, the rating is applicable with exposure on either face. Brick veneer fastened with corrugated metal Wall ties attached over sheathing to steel studs with No. 6 steel screw per tie; ties spaced not more than each sixth course of brick. Min 1 in. air space provided between brick veneer and sheathing.
      C. Particleboard Siding — Hardboard exterior sidings including patterned panel or lap siding.
      D. Wood Structural Panel or Lap Siding — APA Rated Siding marked Exterior, plywood, OSB, or composite panels with veneer faces and structural wood core, per PS 1 or APA Standard PRP-108, including textured, rough sawn, medium density overlaid, brushed, and grooved panels or lap siding.
      E. Stucco — Portland cement type - min nom 3/4 in. thickness. Metal lath or mesh base fastened over sheathing to steel studs with No. 6 screws or other approved fasteners for attaching lath to steel framing.
      F. Exterior Insulation and Finish System (EIFS) — Nom 1 in. Foamed Plastic* insulation bearing the UL Classification Marking, attached over sheathing and finished with coating system, or Portland cement or synthetic stucco systems, in accordance with manufacturer's instructions.

        See Foamed Plastic* (BRYX or CCVW) category for names of Classified companies.

      G. Exterior Insulation and Finish System (EIFS) — Greenmaker Industries (FWFX/FWFO) - Decoplast Liquid Weather Resistive Barrier, Decoplast Liquid Base Coat, Decoplast Fiberglass Reinforced Mesh, Decoplast Acrylic Textured Finish.
    8. Batts and Blankets* — Any glass fiber or mineral wool insulation bearing the UL Classification marking as to fire resistance, of a thickness to completely fill stud cavity.

      See Batts and Blankets (BKNV or BZJZ) category 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 2018-07-12
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