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. D779

September 07, 2018

Restrained Assembly Ratings — 1, 1-1/2, 2, 3 & 4 H

Unrestrained Assembly Ratings — 1, 1-1/2, 2, 3 & 4 H

Unrestrained Beam Ratings — 1, 1-1/2, 2, 3 & 4 H

Restricted Load Condition — See Items 1 and 6

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. Supports — W8 x 28 or alternate (per Section IV.6 in the front of the Fire Resistance Directory) steel beam or min 8K1 steel joists when joist substitution applied.

    Note: Joists from the N series designs may be substituted for the listed beam (Item 1). When joists are substituted, the restrained rating of the joist must be equal to or greater that the restrained rating of the assembly. Additional joist substitution requirements are contained in the front of the Fire Resistance Directory.

    2. Normal Weight or Lightweight Concrete — Normal weight concrete, carbonate or siliceous aggregate, 145 pcf plus or minus 3 pcf unit weight, 3000 psi compressive strength, vibrated. Lightweight concrete, expanded shale, clay, or slate aggregate by rotary-kiln method 102-120 pcf unit weight, 3000 psi compressive strength, vibrated, 4 to 7 percent air. Min thickness as measured to crests of steel floor and form units, 2-1/2 in.
    3. Welded Wire Fabric — 6 x 6 - W1.4 x W1.4.
    3A. Fiber Reinforcement — As an alternate to Item 3, engineered synthetic fibers added to concrete mix to control shrinkage cracks in concrete. See Fiber Reinforcement (CBXQ) category in the Fire Resistance Directory for names of manufacturers and rates of application.
    4. Steel Floor and Form Units — Composite 1-1/2, 2, or 3 in. deep galv units. Min gauge is 22 MSG.

    ASC STEEL DECK, DIV OF ASC PROFILES L L C — 32 in. wide Types NH-32, NHN-32; 36 in. wide Types BH-36, BHN-36, BHN-35-1/4, 2WH-36, 2WHS-36, 3WxH-36, 3WH-36, 3W-36, DG3W-36. All units may be galvanized or Prime Shield. Non-cellular decks may be vented designated with a "V" suffix to the product name.


    CANAM STEEL CORP — 24 in. wide Type P-2432 composite or 36 in. wide Types P-3623, P-3606 and P-3615


    CANAM STEEL CORP — 24, 30 or 36 in. wide Type BL; 24 or 36 in. wide Types LF1.5, LF2, LF3; 24, 36 in. wide Types LF2, -3 may be welded or fastened together with min 1 in. long No. 10 self-drilling, self-tapping steel screws 36 in. OC. Types BL, LF2, -3, N-Lok may be phos/ptd


    KAM INDUSTRIES LTD, DBA CORDECK — 24 in. wide, QL-3, 24 or 36 in. wide, 2 or 3 in. deep QL-99. Units may be welded or fastened together with No. 10 self-drilling, self-tapping screws 60 in. OC. The length of the screws shall be sufficient to fully penetrate adjacent floor units


    NEW MILLENNIUM BUILDING SYSTEMS L L C — 24 in. wide Types CFD-2, 3, 24, 30, or 36 in. wide Type CFD-1.5. Units may be phos/ptd


    DECK WEST INC — 36 in. Types 2-DW, 3-DW, B-DW or BA-DW. Units may be welded or fastened together with No. 10 self-drilling, self-tapping screws 60 in. OC. The length of the screws shall be sufficient to fully penetrate adjacent floor units


    DESIGN ASSISTANCE CONSTRUCTION SYSTEMS INC — 36 in. wide Type DACS1.5CD, or 24 in. wide Types DACS2.0CD or DACS3.0CD


    EPIC METALS CORP — 24 in. wide Types EC150, EC366, 36 in. wide Type EC266


    NEW MILLENNIUM BUILDING SYSTEMS L L C — Types 1.5CD, 1.5CDI, 1.5CDR, 2.0CD, or 3.0CD. Units may be phos/painted or galvanized.


    OEG BUILDING MATERIALS — Types 1-1/2", 2" and 3" deep Composite Decks


    VERCO DECKING INC - A NUCOR CO — FORMLOK™ deck types PLB, B, BR, PLN3, N3, PLN, N, PLW2, W2, PLW3, W3. Units are min 24 in. wide and may be galvanized or phos./ptd. Deck may be vented or non-vented.


    VULCRAFT, DIV OF NUCOR CORP — 24, 30 or 36 in. wide Types 1.5VL1, 1.5PLVLI; 24 or 36 in. wide Types 2VL1, 2.0PLVLI, 3VL1, 3.0PLVLI. Units may be phos/ptd. 36 in. wide Types 1.5 SB, 1.5 SBR; 24 or 36 in wide Types 2.0 SB, 3.0 SB, 36 in. wide Type High Strength 1.5 SBI, 36 in. wide Type High Strength 1.5 SBN; Units may be phos/ptd


    5. Shear Connectors — (Optional) — Studs, 3/4 in. diam by 4-1/2 in. long, headed type or equivalent per AISC specification. Welded to top flange of the beam, or top chord of the joist, through the deck.
    6. Spray-Applied Fire Resistive Materials — Applied by mixing with water and spraying to steel surfaces which must be clean and free of dirt, loose scale and oil. When steel deck is used, the area between the steel deck and the beams top flange shall be filled. Min avg and min ind density of 15/14 pcf respectively. Min avg and min ind density of 22/19 pcf respectively for Types Z-106, Z-106/G, Z-106/HY. Min avg and min ind density of 40/36 pcf respectively for Types Z-146, Z-146PC and Z-146T cementitious mixture. Min avg and min ind density of 50/45 pcf respectively for Types Z-156, Z-156T and Z-156PC. Application to steel deck requires the installation of expanded metal lath with Type Z-146, Z-146T, Z146PC, Z-156, Z-156T and Z-156PC only. See Item 7. For method of density determination, refer to Design Information Section.
    Restrained
    Assembly
    Rating Hr
    Unrestrained
    Assembly
    Rating Hr
    Unrestrained
    Beam
    Rating Hr
    Spray Applied Fire Resistive Mtl
    Thkns In. on Steel Deck

    Concrete
    Type
    Crests Valley
    1 0 1 0 0 LW
    1 1 1 5/16 5/16 NW or LW
    1-1/2 1 1 5/16(a) 5/16(a) NW or LW
    1-1/2 1-1/2 1-1/2 5/16(a) 5/16(a) NW or LW
    2 1 1 3/8(b) 3/8 NW or LW
    2 2 2 3/8(b) 3/8 NW or LW
    3 1-1/2 1-1/2 11/16 1/2 NW or LW
    3 3 3 11/16 1/2 NW or LW
    4 2 2 1-1/2 1-1/8 LW
    4 4 4 1-1/2 1-1/8 LW
    4 2 2 1-7/16 13/16 NW
    4 4 4 1-7/16 13/16 NW

    (a) Min thickness of 3/8 in. required when 1-1/2 in. deep fluted units are used.

    (b) Min thickness of 1/2 in. is required in crests of 1-1/2 in. deep fluted units for the 2 h Restrained Assembly Rating.

    Restrained
    Assembly
    Rating Hr
    Unrestrained
    Assembly
    Rating Hr
    Unrestrained
    Beam
    Rating Hr
    Beam Thickness
    Light Weight Concrete Normal Weight Concrete
    full flange 1/2 flange## full flange 1/2 flange##
    W8x28 W8x28 W8x28 W8x28
    Beam Beam Beam Beam
    1 0 1 5/16 7/16 5/16 7/16
    1 1 1 5/16 7/16 5/16 7/16
    1 1/2 1 1 5/16 7/16 5/16 7/16
    1 1/2 1 1/2 1 1/2 11/16 3/4 5/8 3/4
    2 1 1 5/16 7/16 5/16 7/16
    2 2 2 1 1 7/8 1-1/16
    3 1 1/2 1 1/2 11/16 3/4 5/8 3/4
    3 3 3 1-5/16 1-7/16 1-7/16 1-11/16
    4 2 2 1 1 7/8 1-1/16
    4 4 4 1-5/8 1-15/16 2 2-5/16

    ## Applicable when the thickness applied to the beams' lower flange edges is reduced to one-half. Thickness applied to beams' lower flange edges shall be a min of 1/4 in.

    ARABIAN VERMICULITE INDUSTRIES — Types MK-6/HY, MK-6/HY Extended Set, MK-6/HB, MK-10 HB, MK-10 HB Extended Set, MK-6s, MK-6 GF, MK-6 GF Extended Set, MK-1000/HB, MK-1000/HB Extended Set, Z-106, Z-106/G, Z-106/HY, Z-146 investigated for exterior use


    GCP KOREA INC — Types MK-6/HY, MK-6/HY Extended Set, MK-6/HB, MK-10 HB, MK-10 HB Extended Set, MK-6s, MK-6 GF, MK-6 GF Extended Set, MK-1000/HB, MK-1000/HB Extended Set, Z-106, Z-106/G, Z-106/HY, Z-146 investigated for exterior use


    GCP APPLIED TECHNOLOGIES INC — Types MK-6/HY, MK-6/HY Extended Set, MK-6/HB, MK-10 HB, MK-10 HB Extended Set, MK-6s, MK-6 GF, MK-6 GF Extended Set, MK-1000/HB, MK-1000/HB Extended Set, RG, Z-106, Z-106/G, Z-106/HY, Z-146, Z-146T, Z146PC, Z-156, Z-156T and Z-156PC investigated for exterior use


    6A. Sprayed Fiber* — (Optional, Not Shown) Sprayed Fiber, Classified for Surface Burning Characteristics (BNST), having a maximum applied density of 3.5 pcf applied over Spray-Applied Fire Resistive Material (Item 6) on both Steel Floor and Form Units (Item 4) and Supports (Item 1) in accordance with the following tables:

    Allowable Sprayed Fiber Thickness over SFRM applied to Steel Deck (Item 4)

    Installed
    SFRM
    Thickness
    (in.) on
    Deck
    SFRM Density (lb/ft3)
    15 22 40 50
    Sprayed Fiber Thickness (in.)
    0 6-11/16 8 8 8
    5/16 5-3/8 7-7/8 8 8
    3/8 5-1/16 7-7/16 8 8
    11/16 3-3/4 5-1/2 8 8
    1-7/16 9/16 13/16 8 8
    1-1/2 1/4 3/8 8 8

    Note: Installed SFRM thickness on deck refers to thickness applied to crests of steel deck.

    Allowable Sprayed Fiber Thickness over SFRM applied to Beams (Item 1)

    Installed
    SFRM
    Thickness
    (in.) on
    Beam
    SFRM Density (lb/ft3)
    15 22 40 50
    Sprayed Fiber Thickness (in.)
    5/16 8 8 8 8
    7/16 8 8 8 8
    5/8 8 8 8 8
    11/16 8 8 8 8
    3/4 8 8 8 8
    7/8 8 8 8 8
    1 8 8 8 8
    1-1/16 8 8 8 8
    1-5/16 7-3/4 8 8 8
    1-7/16 7-1/4 8 8 8
    1-5/8 6-7/16 8 7-7/8 8
    1-11/16 6-3/16 8 7-1/8 8
    1-15/16 5-1/16 7-7/16 4-5/16 5-3/8
    2 4-13/16 7-1/16 3-9/16 4-7/16
    2-5/16 3-1/2 5-1/8 0 0

    INTERNATIONAL CELLULOSE CORP — Type K13, URE-K, or SonaSpray FC


    7. Metal Lath — (Not Shown) — (Required with Z-146, Z-146T, Z146PC, Z-156, Z-156T and Z-156PC, otherwise optional)—Metal lath shall be 3/8 in. expanded diamond mesh, weighing 2.5 lb per sq yd. Secured to underside of steel deck with No. 12 by 3/8 in. pan head self-drilling, self-tapping screws and steel washers with an outside diam of 1/2 in. screws spaced 12 in. OC in both directions with lath edges overlapped approx 3 in.

    * 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 2018-09-07
BXUV.D779 D779 BXUV 738115001 DESIGN Active 20180907 20180907 754471002 211701001 730823001 922820001 100589912 358860001 100518273 348627001 132101001 P1420716 738115001 301426002 544031001 946757001 772402040 979414001

Design/System/Construction/Assembly Usage Disclaimer

  • 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.
  • When field issues arise, it is recommended the first contact for assistance be the technical service staff provided by the product manufacturer noted for the design. Users of fire resistance assemblies are advised to consult the general Guide Information for each product category and each group of assemblies. The Guide Information includes specifics concerning alternate materials and alternate methods of construction.
  • Only products which bear UL's Mark are considered Certified.

The appearance of a company's name or product in this database does not in itself assure that products so identified have been manufactured under UL's Follow-Up Service. Only those products bearing the UL Mark should be considered to be Certified and covered under UL's Follow-Up Service. Always look for the Mark on the product.

UL permits the reproduction of the material contained in the Online Certification Directory subject to the following conditions: 1. The Guide Information, Assemblies, Constructions, Designs, Systems, and/or Certifications (files) must be presented in their entirety and in a non-misleading manner, without any manipulation of the data (or drawings). 2. The statement "Reprinted from the Online Certifications Directory with permission from UL" must appear adjacent to the extracted material. In addition, the reprinted material must include a copyright notice in the following format: "© 2019 UL LLC".