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. U040

July 23, 2019

Nonbearing Wall Rating — 1, 2 or 3 Hr (See Item 4)

* Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively.

    1. Floor and Ceiling Runners — Channel-shaped runners, 3-5/8 in. wide min., fabricated from No. 25 MSG galv steel. Attached to floor and ceiling with fasteners spaced 24 in. OC, max.
    2. Building Units* — Insulated steel panels 24, 30 or 42 in. wide. Attached through retainer clips to studs or support steel with No. 14 hex head self-tapping screws located at each joint in the concealed lip of the units and spaced in accordance with the structural design requirements.

    CENTRIA, A DIVISION OF NCI GROUP, INCTypes Formawall Dimension Series, Formawall Dimension Series Graphix, Versapanel 1.75", 2.5", 4"; Versawall 2", 2.75", 4"; MetalWrap Long Span 2", 2.75" & 4" and MetalWrap.


    3. Steel Studs — Channel shaped, 3-5/8 in. wide min, 1-1/4 in. legs, 3/8 in. folded back returns, min 0.020 in. thick (25 gauge) galv steel spaced 24 in. OC max. Studs 3/8 in. less in lengths than assembly height.
    4. Gypsum Board* — (For 1 and 2 hour ratings when exposed on interior face only) — Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. For a 1 hour rating, nom. 5/8 in. thick, 4 ft wide, two layers applied vertically with joints centered over studs. Inner layer attached to studs and runners with 1 in. long, Type S screws located 5/8 to 3/4 in. from sides and ends of wallboard and spaced 12 in. OC. Face layer attached through inner layer into studs and runners with 1-5/8 in. long Type S screws located 5/8 to 3/4 in. from sides and ends of wallboard and spaced 18 in. OC. Joints to be staggered from the inner layer. For a 2 hour rating, nom. 5/8 in. thick, 4 ft wide, four layers applied vertically with joints centered over studs. Base layer attached to studs and runners with 1 in. long, Type S screws spaced 12 in. OC. Second layer attached through base layer into studs and runners with 1-5/8 in. long Type S screws spaced 18 in. OC. Third layer attached through base layer into studs and runners with 2-1/4 in. long Type S screws spaced 18 in. OC. Face layer attached through base layer into studs and runners with 3 in. long Type S screws spaced 18 in. OC. Joints to be staggered 24 in. from the inner layer joint. Screws offset a min. 6 in. from layer below.

    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)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 GYPSUMType QuietRock ES.


    4B. Gypsum Board* — (For 1, 2 and 3 hour ratings when exposed on either side of wall) - Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. See Item 4 for list of Companies. For a 1 hour rating, 5/8 in. thick, 4 ft wide, attached to steel studs and floor and ceiling track with 1 in. long, Type S steel screws spaced 8 in. OC. along edges of board and 12 in. OC in the field of the board. Joints oriented vertically and staggered on opposite sides of the assembly. For a 2 hour rating, 5/8 in. thick, 4 ft wide, two layers applied vertically on both sides of studs with joints centered over studs. Base layer attached to studs and runners with 1 in. long, Type S screws spaced 16 in. OC statting 8 in. from the edge of the board with an additional screw placed 1-1/4 in. from each edge of boad. Second layer attached through base layer into studs and runners with 1-5/8 in. long Type S screws spaced 16 in. OC starting 8 in. from each edge of the board with an additional screw placed 1-1/4 in. from each edge of the board. Joints to be staggered 24 in. from the inner layer joint. Screws offset a min. 6 in. from layer below. For a 3 hour rating, 5/8 in. thick, 4 ft wide, three layers applied vertically on both sides of studs with joints centered over. Base layer attached to studs and runners with 1 in. long, Type S screws spaced 24 in. OC. Second layer attached through base layer into studs and runners with 1-5/8 in. long Type S screws spaced 24 in. OC. Third layer attached through second and base layers into studs and runners with 2-1/4 in. long Type S screws spaced 12 in. OC. Joints to be staggered 24 in. from the inner layer joint. For all layers, an additional screw shall be placed 1-1/4 in. from the edge of the board. Screws offset a min. 6 in. from layer below.
    4C. Wall and Partition Facings and Accessories* — (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 GYPSUMType QuietRock QR-527.


    5. Subgirts (optional) — Hat or Z shaped min 1/2 in. deep, min .045 in. thick (18 gauge) galv steel, attached to studs, 48 in. OC with No. 14 self-tapping screws or No. 14 self-drilling screws.
    6. Batts and Blankets* — (Optional) — Placed in stud cavities. Any glass fiber or mineral wool batt material bearing the UL Classification Marking as for Fire Resistance, of a thickness to completely fill the stud cavity.

    See Batts and Blankets (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 2019-07-23
BXUV.U040 U040 BXUV 882208001 DESIGN Active 20190723 20190723 128669004 100562937 283066001 736720001 100219806 846414005 294450001 299592001 226521001 923830002 100046076 544217001 798029001 100584219 730408054 P1802957 287840003 100046076 100046076

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  • Authorities Having Jurisdiction should be consulted in all cases as to the particular requirements covering the installation and use of UL Certified products, equipment, system, devices, and materials.
  • Authorities Having Jurisdiction should be consulted before construction.
  • Fire resistance assemblies and products are developed by the design submitter and have been investigated by UL for compliance with applicable requirements. The published information cannot always address every construction nuance encountered in the field.
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