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. G555

August 22, 2019

Unrestrained Assembly Ratings — 1 and 2 Hr.

Restrained Assembly Ratings - 1 and 2 Hr.

Unrestrained Beam Ratings — 1 and 2 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.

    Beam - (Not Shown) - W10x22, min size. If the underside of the bottom flange of the beam is lower than the underside of the bottom of the TotalJoist™ Structural Member (Item 4.) the ceiling shall be dropped below the plane of the beam as specified in Item 7A or 7B.

    System A

    1. Steel Deck (CHWX) — Total-Lewis-Deck - Min. 0.70 in. deep, 25 MSG galv deck. Overlapped 1/2 corrugation at each side and attached to each joist with 3/4 in. long #10-16 self-drilling, self-tapping screws spaced 7 in OC max. Along steel deck sidelap, 3/4 in. long #10-16 self-drilling, self-tapping screws are installed at 24 in OC max. As an alternate to the #10 screws Hilti X-HSN 24 power actuated fasteners installed as per manufacturer's instructions maybe used.

    ISPAN SYSTEMS LPTotal-Lewis-Deck™


    System B

    1A. Steel Deck — (Not Shown) Min 9/16 in. deep, 22 MSG galv corrugated fluted steel deck. Overlapped one corrugation at each side and attached to each joist with 3/4 in. long #10-16 self-drilling, self-tapping screws at 10 in OC max. At steel deck overlap over joist three 3/4 in. long #10-16 self-drilling, self-tapping screws are installed into the joist one screw in the center flute and one on each adjacent flute. As an alternate to the #10 screws Hilti X-HSN 24 power actuated fasteners installed as per manufacturer's instructions maybe used.
    1B. Multi-Shear Connectors* — TotalJoist™ MultiShear Connectors installed through the steel deck to the top flange of the Joist with 1-# 12-1 in. long self-drilling, self-tapping Screw. MultiShear Connectors spaced at 12 in. OC., along the length of the joist and located adjacent to the joist web.

    ISPAN SYSTEMS LPTotalJoist™ MultiShear Connector


    2. Normal Weight Concrete* — Normal weight concrete, compressive strength to be 3000 psi min. Density 145 +/- 3 psf. For System B, minimum thickness to be 2-3/4 in. as measured from the valley of the deck. For System A, minimum thickness to be 3 in. as measured from the valley of the deck.
    3. Welded Wire Fabric — Minimum 6 in. x 6 in. W2.9 x W2.9 placed in the middle of the concrete (Item 2).
    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 for rate that fibers are added to concrete mix.

    BASF CORPORATIONType MasterfiberMAC Matrix, MasterFiber MAC 2200CB, MasterFiber MAC 100, MasterFiber MAC 100 Plus, MasterFiber MAC 360 FF.


    FABPRO POLYMERS, A DIV OF GREAT LAKES POLYMER TECHNOLOGIESType Performax Synthetic Macrofiber, Performax HT Synthetic Macrofiber.


    FORTA CORPType Forta Ferro fiber.


    GCP APPLIED TECHNOLOGIES INCTypes Strux 90/40 and 75/32


    PROPEX OPERATING CO L L CType Fibermesh 650, Enduro Mirage, and Enduro Prime


    4. Structural Steel Members* — TotalJoist™ - Minimum 8 in. deep, 16 ga. minimum thickness, spaced maximum 48 in. OC.

    ISPAN SYSTEMS LPTotalJoist™


    5. Bridging* — TotalJoist™ Snap-On bridging, 1-7/8 in. by 5/8 in. by minimum 20 ga. bridging attached to bottom chords on each joist and located 8 ft - 0 in. apart or at mid-point of joist for shorter spans. Bridging attached to chords of each joist using 1 #12-14, 3/4 in. long, self-drilling, self-tapping screw. Alternatively bridging shall be attached to the chords of each joist using two 0.100 in. diameter by 3/4 in. long pneumatically driven steel pins

    ISPAN SYSTEMS LPTotalJoist™ Snap-On Bridging


    5A. Alternate Bridging* (Not Shown) — TotalJoist™ Bridging, 1-7/8 in. by 5/8 in. by minimum 20 ga. Bridging installed perpendicular to joists through web holes and located 8ft- 0 in. apart or at mid-point of joist for shorter spans. Bridging attached to flange of web hole in each joist using 1 hex head, self-drilling, self-tapping #10 screw, 3/4 in. long. Alternatively, bridging may be attached to joists using minimum 3/4 in. by 3/4 in. by 20 GA. clip angle. Clip angle fastened to joist web and to bridging using 1 hex head, self-drilling, self-tapping #10 screw, 3/4 in. long.

    ISPAN SYSTEMS LPTotalJoist™ Bridging


    6. Blocking* — (Not Shown) —TotalJoist™ Blocking, 18 ga. attached between joists using 2 #12-14, 1 in. long, self-drilling, self-tapping screws. Blocking spaced at every fifth bay and at end bays.

    ISPAN SYSTEMS LPTotalJoist™ Blocking


    6A. Alternative Blocking (not shown) — TotalJoist™ cut to fit the space between the two adjacent joists and attached to joists with 16 ga. 6 in. by 3 in. angle connected to blocking and joist with 2-#12-14, 1 in. long. self-drilling, self-tapping screws on each leg of the angle. TotalJoist™ Blocking, 18 ga. blocking spaced at every fifth bay and at end bays.

    ISPAN SYSTEMS LPTotalJoist™


    6B. Alternative Blocking (not shown) — Cross bridging with TotalJoist™ Bridging, 1-7/8 in. by 5/8 in. by minimum 20 ga. cut to fit the space between the two adjacent joists and attached to joists with 1 #10-3/4 in. long self-drilling, self-tapping. Blocking spaced at every fifth bay and at end bays.

    ISPAN SYSTEMS LPTotalJoist™ Bridging


    7. Furring Channels — Minimum 25 ga. thick, 7/8 in. deep hat-shaped galvanized steel channels. Channels shall be spaced maximum 24 in. apart when there is no insulation draped over the furring channels and 12 in. apart when insulation is installed. Attached to the bottom flange of each joist with two double strand 18 gauge steel wire. At locations where gypsum board end joints occur, additional furring channels shall be installed to provide screw attachments for the gypsum board ends. These additional channels shall be positioned so that the distance from the end of the board to the center of the first channel is 3 in. and from the board end to the center of the next channel is 24 in. when there is no insulation in the cavity and 12 in. when insulation is installed. Joints in channels shall be overlapped 4 in. and shall be located directly below the joist. Channels shall be cut 1/2 in. short of the end supports.
    7A. Steel Framing Members* — (Optional, Not Shown) — When it is desired to drop the ceiling below the bottom plane of the structural steel members (Item 4), a suspension system may be used in lieu of the furring channels. Main runners, cross tees, cross channels and wall angle as listed below:
      a. Main Runners — Nom 10 or 12 ft long , 15/16 in. or 1-1/2 in. wide face, spaced 4 ft. OC. Main runners suspended by min 12 SWG galv steel hanger wires spaced 48 in. OC a min of 4 in. below bottom flange of joists, twist tied to #10 - 3/4 in. long screws installed in the web, 1/2 in. from the bottom flange of the steel joists. When insulation is used (Item 7), 12 SWG galv steel hanger wires spaced 24 in. OC and main runners suspended parallel and directly below structural steel members (Item 4). Hanger wires to be located adjacent to main runner/cross tee intersections.
      b. Cross Tees — Nom 4 ft long, 1-1/2 in. wide face, installed perpendicular to the main runners, spaced 16 in. OC. Additional cross tees or cross channels used at 8 in. from each side of butted gypsum panel end joints. The cross tees or cross channels may be riveted or screw attached to the wall angle or channel to facilitate the ceiling installation.
      c. Cross Channels — Nom 4 ft long, installed perpendicular to main runners, spaced 16 in. OC.
      d. Wall Angle or Channel — Painted or galv steel angle with 1 in. legs or channel with 1 in. legs, 1-9/16 in. deep attached to walls at perimeter of ceiling with fasteners 16 in. OC. To support steel framing member ends and for screw-attachment of the gypsum panel.

      CGC INC Type DGL


      USG INTERIORS LLC Type DGL


    7B. Alternate Steel Framing Members* — (Optional - Not Shown) - Not for use with Batts and Blankets* (Item 9) -As an alternate to Items 7 and 7A - Main runners nom 12 ft long, spaced 72 in. OC. Main runners suspended by min 12 SWG galv steel hanger wires spaced 48 in. OC. Cross tees, nom 6 ft long, installed perpendicular to main runners and spaced 24 in. OC. Additional 6 ft long cross tees required at each gypsum board end joint with butted gypsum board end joints centered between cross tees spaced 8 in. OC. The main runners and cross tees may be riveted or screw attached to the wall angle or channel to facilitate the ceiling installation.

    USG INTERIORS LLCType DGL or RX


    7C. Steel Framing Members — (Optional - Not Shown) - Concrete anchor assembly to provide alternate method to attach hanger wire (used with Item 7A Main Runners) or tie 18 gauge steel wire (used with Item 7). Anchor assembly secured within pre-drilled holes in the underside of the concrete slab and steel deck (Item 1 and 1A) through a rubber grommet and anchor system. The galvanized angle includes holes to accommodate tie wire which is twist-tied around the main runners or resilient channels at the other end. Hanger clips are to be spaced maximum 48 in. OC.

    SOPREMA INCAcoustivibe CDC


    7D. Steel Framing Members — (Optional - Not Shown) - Concrete anchor assembly to provide alternate method to attach hanger wire (used with Item 7A Main Runners) or tie 18 gauge steel wire (used with Item 7). Anchor assembly secured to Steel Deck (Item 1 or 1A) prior to pouring of concrete topping. Anchors consist of a rubber grommet, galvanized angle, washers, and self-tapping fastener which penetrate Steel Deck. Fastener used for anchor is to be minimum 2-3/16 in. long, with 1-1/4 in. penetrating into the Steel Deck and concrete topping. The galvanized angle includes holes to accommodate tie wire which is twist-tied around the main runners or resilient channels at the other end. Hanger clips are to be spaced maximum 48 in. OC.

    SOPREMA INCAcoustivibe NAS


    7E. Steel Framing Members* — — (Optional, Not Shown) — As an alternate to Item 7 — Furring channels and Steel Framing Members as described below:
      a. Furring channels — Formed of No. 25 MSG galv steel, 2-3/8 in. wide by 7/8 in. deep, perpendicular to joists (Item 4). Channels shall be spaced maximum 24 in. apart when there is no insulation draped over the furring channels and 12 in. apart when insulation is installed. Channel secured to joists as described in Item b. Ends of adjoining channels overlapped 6 in. and tied together with double strand of No. 18 SWG galv steel wire near each end of overlap. Additional channels shall be positioned so that the distance from the end of the board to the center of the first channel is 3 in. and from the board end to the center of the next channel is 24 in. when there is no insulation in the cavity and 12 in. when insulation is installed. Channels shall be cut 1/2 in. short of the end supports.
      b. Steel Framing Members* — Used to attach furring channels (Item a) to joists (Item 4). Clips spaced 48 in. OC when channels spaced 24 in. and 24 in. OC when channels spaced 12 in. OC. Clips secured to the bottom chord of joists with min 1-5/8 in. long No. 8 self-drilling, self-tapping, bugle, flat or hex head screw through the center grommet. Furring channels are friction fitted into clips. Additional clips required to hold furring channel that supports the gypsum board butt joints.

    PLITEQ INCType Genie Clip


    8. Gypsum Board* — Nominal 5/8 in. thick, 48 in. wide gypsum board installed with long dimension perpendicular to furring channels. When there is no insulation in the cavity, gypsum board shall be attached to furring channels using 1 in. long Type S drywall screws, spaced 12 in. OC in the field of each board. At the butt joints, screws shall be located 1 in. and 6 in. from the board edge. At the side joints, screws shall be located 1 in. and 12 in. from the board edge. When insulation is installed in the cavity, gypsum board shall be attached to furring channels using 1 in. long Type S drywall screws, spaced 8 in. OC in the field of each board. At the butt joints, screws shall be located 1 in. and 4 in. from the board edge. At the side joints, screws shall be located 1 in. and 8 in. from the board edge. Side joints shall not be located under joists and shall be a minimum of 12 in. from joist centerline or centered between joists where the joist spacings is less than 24 in. OC. All end joints shall be completed backed by 3 in. wide strips of gypsum board centrally positioned over the joints.

    CGC INC Type C


    UNITED STATES GYPSUM CO Type C, ULIX


    USG BORAL DRYWALL SFZ LLCType C


    USG MEXICO S A DE C V Type C


    8A. Gypsum Board* — For use when Steel Framing Members* (Item 7A) are used - One layer of 5/8 in. thick, 4 ft wide, installed with long dimension perpendicular to cross tees with side edges centered over main runners and joints centered over cross tees or channels. Fastened to cross tees or channels with 1 in. long Type S screws bugle-head screws spaced 8 in. OC with the screws located 4 in. from the mid-span of the cross tee or channel, and 1-1/2 in. from side edges of gypsum panel. Fastened to main runners with 1 in. long Type S bugle-head screws spaced midway between cross tees or channels. End joints of gypsum panels shall be staggered not less than 4 ft OC with adjacent gypsum panels end joints.

    CGC INC Type C


    UNITED STATES GYPSUM CO Type C, ULIX


    USG BORAL DRYWALL SFZ LLCType C


    USG MEXICO S A DE C V Type C


    8B. Gypsum Board* — For use when Steel Framing Members* (Item 7B) are used - One layer of 5/8 in. thick, 4 ft wide installed with long dimension (side joints) perpendicular to the 6 ft long cross tees with the end joints staggered min 4 ft and centered between cross tees which are spaced 8 in. OC. Gypsum board side joints may occur beneath or between main runners. Prior to installation of the gypsum board sheets, backer strips consisting of nom 7-3/4 in. wide pieces of gypsum board are to be laid atop the cross tee flanges and centered over each butted end joint location. The backer strips are to be secured to the flanges of the cross tees at opposite corners of the backer strip with hold down clips to prevent the backer strips from being uplifted during screw-attachment of the gypsum board sheets. Gypsum board fastened to cross tees with 1 in. drywall screws spaced 1 in. and 4 in. from the side joints and max 8 in. OC in the field of the board. The butted end joints are to be secured to the backer strip with No. 10 by 1-1/2 in. long Type G laminating screws located 1 in. from each side of the butted end joint and spaced 1 in. and 4 in. from the side joints and max 8 in. OC in the field of the board.

    CGC INC Type C


    UNITED STATES GYPSUM CO Type C, ULIX


    USG BORAL DRYWALL SFZ LLCType C


    USG MEXICO S A DE C V Type C


    8C. Gypsum Board* — (For use with Item 7 when air ducts are installed) Nominal 5/8 in. thick, 48 in. wide gypsum board installed with long dimension perpendicular to furring channels. When there is no insulation in the cavity, gypsum board shall be attached to furring channels using 1 in. long Type S drywall screws, spaced 12 in. OC in the field of each board. At the butt joints, screws shall be located 1 in. and 6 in. from the board edge. At the side joints, screws shall be located 1 in. and 12 in. from the board end. When insulation is installed in the cavity, gypsum board shall be attached to furring channels using 1 in. long Type S drywall screws, spaced 8 in. OC in the field of each board. At the butt joints, screws shall be located 1 in. and 4 in. from the board edge. At the side joints, screws shall be located 1 in. and 8 in. from the board end. All end joints shall be completed backed by 3 in. wide strips of gypsum board centrally positioned over the joints.

    UNITED STATES GYPSUM COULIX


    9. Batts and Blankets* — (Optional, Not shown) — UL Classified, unfaced glass fiber insulation, nominal 3.5 in. thick, nominal density 0.5 lb/cu. ft. Insulation draped over the furring channels (Item 7) or suspension system grid (Item 7A).
    10. Joint System — (Not shown) — Paper tape embedded in joint compound over joints and covered with 2 layers of compound with edges feathered out. Wallboard screw heads covered with 2 layers of compound.
    11. Air Duct — Duct made of min. 0.023 in. thick (24 gauge) galv. steel. For unprotected duct outlets, total area of duct openings not to exceed 20 sq. in. per 100 sq. ft. of ceiling area. Area of individual opening not to exceed 20 sq. in. Max dimension of opening to be 5 in. For protected duct outlets, total area of duct openings not to exceed 144 sq. in. per 100 sq. ft. of ceiling area. Area of individual opening not to exceed 144 sq. in. Max dimension of opening to be 12 in. The unprotected and protected duct openings shall not be installed within the same 100 sq. ft. of ceiling area. Duct outlets to be located 12 in. or more from the nearest joist of beam. Ducts supported by 1-1/2 in. deep, 18 MSG cold-rolled steel channels spaced not more than 48 in. OC and on each side of duct opening. Channels suspended from hanger clips by 12 SWG galv. steel wire. A clearance of 4 in. required between back of ceiling membrane and bottom of duct. Grilles over duct openings to be secured to the duct.
    12. Damper — Any UL Classified ceiling damper rated for use in 2 Hr or longer rated assemblies. To be installed in the duct drop per accompanying installation instructions.

    * 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 2019-08-22
BXUV.G555 G555 BXUV 100560153 DESIGN Active 20190822 20190822 100560153 100560153 P940264 P1617881 113782001 P590455 191973001 100560153 100560153 100560153 100560153 100560153 100560153 846414010 100575661 100575661 414565001 414565001 100238497 846414010 730408054 P1802957 287840003 846414010 730408054 P1802957 287840003 846414010 730408054 P1802957 287840003 730408054

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