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. P562

October 23, 2018

Unrestrained Assembly 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. Roof Covering* — Consisting of hot-mopped or cold-application materials compatible with insulation(s) described herein which provide Class A, B or C coverings. See Roofing Materials and Systems Directory-Roof Covering Materials (TEVT).
    1A. Roofing Membrane* — (Not Shown) — In lieu of Item 1, single-ply membrane that is either ballasted, adhered or mechanically attached to the insulation(s) described herein as permitted under the respective company's Classification. See Fire Resistance Directory-Roofing Membranes (CHCI) Category.
    1B. Metal Roof Deck Panels* — In Lieu of or in addition to Items 1 and 1A, the roof covering may consist of mechanically fastened galv or painted steel roof deck panels. Panels may be installed above a steel purlin assembly per metal roof deck manufacturer's specifications. Steel purlin assembly to be installed transverse to steel roof joists (Item 4). A line of sealant or tape may be used at panel side and end laps. See Metal Roof Deck Panels Category in the Roofing Materials and Systems Directory (TJPV) or Fire Resistance Directory (CETW) for names of manufacturers.
    2. Roof Insulation — Foamed Plastic* — Any polyisocyanurate foamed plastic insulation boards bearing the UL Classification Marking. Min thickness is 1 in., with no limit on max overall thickness. Boards installed over the gypsum sheathing (Item 3A) with the end-joints staggered in adjacent rows. When applied in more than one layer, each layer of board to be offset in both directions from layer below in order to lap all joints. Boards loosely laid, adhered or mechanically fastened to the gypsum sheathing and Structural Cement-Fiber (Item 3). See Foamed Plastic (CCVW) Category in the Fire Resistance Directory.
    2A. Roof Insulation — Foamed Plastic* — (Not Shown) — As an alternate to Item 2 —Any polystyrene foamed plastic insulation boards bearing the UL Classification Marking. Min thickness is 1 in., with no limit on max overall thickness. Boards installed over the gypsum sheathing (Item 3A), with the end-joints staggered in adjacent rows. When applied in more than one layer, each layer or board to be offset in both directions from layer below in order to lap all joints. Boards loosely laid, adhered or mechanically fastened to gypsum sheathing and Structural Cement-Fiber (Item 3). See Foamed Plastic (BRYX) category in the Building Materials Directory or Foamed Plastic (CCVW) category in the Fire Resistance Directory.
    2B. Roof Insulation — Mineral and Fiber Boards* — (Not Shown) — As an alternate to Item 2 — Mineral wool, glass fiber or perlite insulation boards, 24 by 48 in. min size, applied in one or more layers. Min thickness is 1 in., with no limit on max overall thickness. Boards installed over the gypsum sheathing (Item 3A), with the end-joints staggered in adjacent rows. When applied in more than one layer, each layer of board to be offset in both directions from layer below in order to lap all joints. Boards loosely laid, adhered or mechanically fastened to gypsum sheathing and Structural Cement-Fiber (Item 3). See Mineral and Fiber Boards (BQXR) Category in the Building Materials Directory or Mineral and Fiber Boards (CERZ) Category in the Fire Resistance Directory.
    3. Structural Cement-Fiber Units* — Nom 3/4 in. thick, with long edges tongue and grooved. Long dimension of panels to be perpendicular to joists with end joints staggered a min of 2 ft and centered over the joists. Panels secured to steel joists with 1-5/8 in. long No. 8 self-drilling, self-countersinking steel screws spaced a max of 12 in. OC in the field with a screw located 1 in. and 2 in. from each edge, and 8 in. OC on the perimeter with a screw located 2 in. from each edge, located 1/2 in. from the side edges of the panel.

    UNITED STATES GYPSUM CO — Types STRUCTO-CRETE, USGSP


    3A. Gypsum Board* (Not Shown) — Min 1/2 in. thick gypsum board, Classified as to Surface Burning Characteristics. Boards loosely laid, adhered or mechanically attached to Structural Cement-Fiber Units. Joints between Structural Cement Fiber Units and of Gypsum Board staggered a min of 6 in. See Gypsum Board (BWFR) Category in the Building Materials Directory or Roofing Systems (TGFU) in the Roofing Material Directory or Gypsum Board (CKNX) Category in the Fire Resistance Directory.

    UNITED STATES GYPSUM CO — Type FRX-G


    4. Structural Steel Members — Channel-shaped, min 10 in. deep with min 1-5/8 in. wide flanges and 1/2 in. long stiffening flanges. Fabricated from min No. 16 MSG galv steel. Min yield strength of 50,000 psi. Joists spaced max 24 in. OC. Supplied with appropriate rim tracks of same size and gauge.
    4A. Structural Steel Members — (Not Shown) -As an alternate to Item 4 - For maximum clear spans not exceeded 8 ft. Channel-shaped, min 6 in. deep with min 1-9/16 in. wide flanges and 3/8 in. long stiffening flanges. Fabricated from min No. 18 MSG galv steel. Min yield strength of 33,000 psi. Joists spaced max 24 in. OC. Supplied with appropriate rim tracks of same size and gauge.
    4B. Structural Steel Members — (Not Shown) -As an alternate to Item 4 - Channel-shaped, min 8 in. deep with min 1-9/16 in. wide flanges and 3/8 in. long stiffening flanges. Fabricated from min No. 16 MSG galv steel. Min yield strength of 33,000 psi. Joists spaced max 24 in. OC. Supplied with appropriate rim tracks of same size and gauge.
    4C. Structural Steel Members* — (Not Shown) - As an alternate to item 4 only - The joists are channel-shaped, 10 in. min depth. Joists are fabricated from min No. 16 MSG galv steel. Joists spaced max 24 in. OC. Joists attached to rim joist with a minimum of three #10 3/4 in. long self-drilling screws at the rim track clip to the outside of the web joist, and a #10 1/2 in. long screw through the top and bottom flange of the joists to the top and bottom flange of the rim track. At rim joist splices bearing on supports, rim joists are connected using an overlapping section of a 12 in. long splice plate (a joist piece), with a minimum of six 3/4 in. long self-drilling #10 screws to each rim piece.

    CALIFORNIA EXPANDED METAL PRODUCTS CO — Type SSCJ floor joists, SSRT rim joists or Type SSTT rim joists. When Type SSTT rim joists are used, secured to preformed clip tabs in accordance with manufacturers installation instructions.


    4D. Clip Angles — (Not Shown) - No. 16 MSG, 9-3/4 in. long steel angles with 2 in. legs. Secured to track and joist with eight No.10, 3/4 in. long, self-drilling, hex head screws, located 1 in. from each end of clip angle, with the other two screws on each leg evenly spaced. Only one clip angle per joist end.
    4E. Clip Angles — (Not Shown) - As an alternate to Item 4D, for use with 6 or 8 in. deep joists (Item 4A or 4B). No. 16 MSG, 5-1/2 in. long steel angles with 1-1/2 in. legs for 6 in. deep joists and No. 18 MSG, 7-1/4 in. long steel angles with 1-1/2 in. legs for 8 in. deep joists. Secured to track and joist with six No.10, 3/4 in. long, self-drilling, hex head screws, located 1 in. from each end of the clip angle and at the centerline. Only one clip angle per joist end.
    4F. Structural Steel Members* — (Not Shown) - As an alternate to Item 4 only. The proprietary joists are channel-shaped, min 9-1/4 in. deep. Joists are fabricated from min No. 16 MSG galv steel. Joists spaced max 24 in. OC. Joists attached to joist rim with three 3/4 in. long No. 10 x 16 self-drilling steel TEK screws through tab to the outside of the web. At joist rim splices bearing on supports, joists rims are connected using an overlapping section of a 12 in. long splice plate (a joist piece), with four 3/4 in. long No. 10 x 16 self-drilling steel TEK screws to each rim piece.

    CLARKDIETRICH BUILDING SYSTEMS — Type TDJ or TDW Floor Joists, TD24 Rim Joist


    4G. Structural Steel Members* — (Not Shown) - As an alternate to Item 4, 4A, 4B, 4C and 4F - Pre-fabricated light gauge steel truss system consisting of cold-formed, galv steel chord and web sections. Trusses fabricated in various sizes, depths and from various steel thickness spaced a maximum of 24 in. OC.

    AEGIS METAL FRAMING, DIV OF MITEK — Ultra-Span, Pre-fabricated Light Gauge Steel Truss System


    HEXAPORT INTERNATIONAL LTD — Strong-Span, Pre-fabricated Light Gauge Steel Truss System


    TRUSSTEEL, DIV OF ITW BUILDING COMPONENTS INC — TrusSteel


    4H. Structural Steel Members* — (Not Shown) - As an alternate to Item 4, 4A, 4B, 4C, 4F and 4G, - Pre-fabricated steel truss system consisting of cold-formed, galvanized steel chord and web sections. Truss top and bottom chords min. 4 in. high by 1-11/16 in. wide by 18 ga. Truss webs min. 1-1/2 in. by 1-1/2 in. by 20 ga. square tube bent and triangulated as shown. Chords and web connected by fillet welds. Overall truss depth min. 12 in. Trusses spaced a max of 24 in. OC. Truss ends placed over and secured to Bearing Seats (Item 4H1) with two min. #10 by 3/4 in. long screws on each side of Bearing Seats. Allowable loading must be calculated so as to stress the steel trusses to a maximum of 98% of the stress calculated in accordance with the allowable stress design approach outlined in the manufacturer's load tables.

    EISEN PANEL SYSTEMS L L C — Type Gateway Panel pre-fabricated steel truss system.


    4H1. Bearing Seats* — (Not Shown) — Galvanized steel tube, min. 1 in. by 2-1/2 in. by 13 ga., oriented vertically and welded to min. 4 in. by 4 in. by 10 ga., galvanized steel plate. Bearing seats spaced 24 in. OC and attached to bearing supports by welding or screw attaching the steel plate to the bearing supports.

    EISEN PANEL SYSTEMS L L C — Type Gateway Panel bearing seat.


    4H2. Bracing — (Not Shown) - For use with Item 4H — Galvanized channel-shaped steel sections, min. 1-1/2 in. wide with 1/4 in. flanges, min. 16 ga. Bracing attached to underside of trusses with min. #10 by 3/4 in. long screws through truss bottom chord. Bracing installed in truss cavities by scoring, bending and flattening the ends to form a tab for attachment to truss top and bottom chords. Two pieces of bracing crossed and tabs secured to truss chords with min. #10 by 3/4 in. long screws. Location and spacing of underside and crossed bracing to be specified on truss engineering.
    4I. Steel Trusses — As an alternate to Items 4, 4A, 4B, 4C, 4F, 4G and 4H - Cold-formed galvanized steel truss chord and web sections manufactured from steel conforming to ASTM A653 Grade 33 or higher yield strength. Steel thickness of truss chord and web sections as required by design to meet governing code requirements. Truss members connected together with No. 10-16 (min size) self-drilling screws or equivalent. Truss chord and web members to be designed in accordance with the American Iron and Steel Institute's Specification for the Design of Cold-Formed Steel Structural Members, 1996 Edition. Trusses spaced a max of 24 in. OC. Where the truss intersects with the interior face of the exterior walls, the min truss depth shall be 12 in.
    4J. Steel Joists — As an alternate to Items 4, 4A, 4B, 4C,4F, 4G, 4H and 4I, minimum 12K1, spaced a max 24 in. OC.
    5. Joist Bridging — (Not Shown) - For use with Item 4 and 4B - Installed immediately after joists are erected and before construction loads are applied. The bridging consisting of joist sections cut to length and placed between outer supports, adjacent to openings and at mid span with 8 ft OC max spacing. Bridging channels are screw-attached at each end to joist web using angle clips. V-bracing of 1-1/2 in. by 20-ga galvanized steel is screw-attached to bottom joist flange between bridging channels.
    5A. Joist Bridging — (Not Shown) - For use with Item 4A - Installed immediately after joists are erected and before construction loads are applied. The bridging consisting of rim track sections cut to length, with two 4 in. long folded back flanges, and placed between outer supports, adjacent to openings and at mid span with 10 ft OC max spacing. Bridging channels are screw-attached to each of the four top and bottom joist flanges with two No. 8 by 1/2 in. long wafer head steel screws.
    5B. Joist Bridging — (Not Shown) - For use with Item 4A and 4B - 1-1/2 in. wide strips formed from 20 MSG - The structural bridging is installed perpendicular to and on the bottom surface of the joists at mid-span with one #10 x 3/4 in. long hex head steel screw at each interface.
    5C. Joist Bridging — Not shown — For use with item 4C. Installed immediately after joists are erected and before construction loads are applied. The structural bridging, Type CEMCO Sure Bridging, consisting of No. 18 MSG galv steel, 2-1/2 in. wide by 25-1/2 in. long with 1-5/16 in. long legs structural bridging staggered between the steel joists and attached to the bottom joist flange with two #10 1/2 in. long self-drilling screws at each end tab of bridging. Solid bridging consisting of cut to length joist sections placed between outer joists and at center joist with 8 ft OC max spacing. Solid bridging is seated in the structural bridging and is screw-attached at joist web using Type CEMCO Sure-Support Clips (1-1/2 in. by 1-1/2 in. by 7 in. long, 16 MSG, min 50 ksi support clip) with three #10 3/4 in. long self-drilling screws per leg on one side and the other side with Type CEMCO Sure-Support Clips (4 in. by 1-1/2 in. by 7 in. long, 16 MSG, min 50 ksi support clip) with three #10 3/4 in. long self-drilling screws per leg.
    5D. Joist Bridging — (Not Shown) —For use with Item 4F. Installed at the center of the joist span immediately after joists are erected and before construction loads are applied. The bridging (2-1/2 TDSB18) consists of No. 18 MSG galv steel channels, 2-1/2 in. wide by 1-1/4 in. deep by 21-3/4 in. long with 2-1/8 in. long web extensions at each end for screw-attachment to the bottom flange of the steel joists with a 3/4 in. long No. 10 x 16 self-drilling steel TEK screw. Solid bridging consisting of cut-to-length joist sections placed between the outermost joists and between the centermost joists with a max spacing of 8 ft OC. Solid bridging are screw-attached at joist web using a 1-1/2 by 1-1/2 by 7 in. long, No. 16 MSG, min 50 ksi steel support clip (EasyClip S-Series S547) with two 3/4 in. long No. 10 x 16 self-drilling steel TEK screws per leg on one side and on the other side with a 4 by 1-1/2 by 7 in. long No. 16 MSG, min 50 ksi steel support clip (EasyClip E-Series E547) with two 3/4 in. long No. 10 x 16 self-drilling steel TEK screws per leg.
    5E. Bridging — (Not Shown)—For use with Item 4G - Location of lateral bracing for truss chord and web sections to be specified on truss engineering.
    6. Batts and Blankets* — Glass fiber insulation, min 3-1/2 in. thick, bearing the UL Classification Marking for Surface Burning Characteristics. Min density of 0.5 pcf. The insulation shall be fitted in the concealed space, draped over the resilient channel (Item 7) or steel frame members (Item 7A) and gypsum board (Item 8) ceiling membrane. See Batts and Blankets (BKNV) category in the Building Materials Directory for names of manufacturers.
    7. Resilient Channels — Formed of No. 25 MSG galv steel, 1/2 in. deep, spaced max 12 in. OC, perpendicular to joists. Channel splices located beneath joists and overlapped 4 in. Channels secured to each joist with one 1/2 in. long Type S-12 low profile steel screw. Two channels, spaced 6 in. OC, oriented opposite each gypsum board end joint as shown on the illustration above. Additional channels shall extend min 6 in. beyond each side edge of board.
    7A. Steel Framing Members* — (Optional) — 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 resilient 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 24 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. 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 or 12 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 or RX


      USG INTERIORS LLC — Type DGL or RX


    7B. 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, spaced 12 in. OC, perpendicular to joists. 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 12 in.
      b. Steel Framing Members* — Used to attach furring channels (Item a) to joists (Item 4). Clips spaced 48 in. OC and 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 INC — Type Genie Clip


    7C. Alternate Steel Framing Members* — (Optional, Not Shown) — As an alternate to Items 7 to 7B, furring channels and Steel Framing Members as described below.
      a. Furring channels — Formed of No. 25 MSG galv steel. 2-9/16 in. or 2-23/32 in. wide by 7/8 in. deep, spaced 12 in. OC, perpendicular to joists. Channels 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.
      b. Steel Framing Members* — Used to attach furring channels (Item a) to the steel joists (Item 4). Clips spaced a max of 48 in. OC. RSIC-1 and RSIC-1 (2.75) clips secured to alternating joists with No. 8 x 2-1/2 in. coarse drywall screw through the center grommet. Furring channels are friction fitted into clips. RSIC-1 clips for use with 2-9/16 in. wide furring channels. RSIC-1 (2.75) clips for use with 2-23/32 in. wide furring channels. Adjoining channels are overlapped as described in Item a. As an alternate, ends of adjoining channels may be overlapped 6 in. and secured together with two self-tapping No. 6 framing screws, min. 7/16 in. long at the midpoint of the overlap, with one screw on each flange of the channel. Additional clips required to hold furring channel that supports the wallboard butt joints, as described in Item 8.

      PAC INTERNATIONAL L L C — Types RSIC-1 or RSIC-1 (2.75)


    8. Gypsum Board* — One layer of nom 5/8 in. thick by 48 in. wide gypsum panels installed with long dimension perpendicular to resilient/furring channels. Gypsum panels secured to resilient/furring channels with 1 in. long Type S bugle-head screws spaced 8 in. OC, with screws located 4 in. from and on each side of the gypsum panel mid-span, and 1-1/2 in. from side edges of the board. End joints secured to both resilient/furring channels as shown in end joint detail. When Steel Framing Members (Item 7B or 7C) are used, the butt joints in the gypsum board shall be supported by two furring channels. The two furring channels shall be spaced approximately 3-1/2 in. OC, and be attached to underside of the joist with one RSIC-1, RSIC-1 (2.75) or Genie clip at each end of the channel.

    CGC INC — Types C, IP-X2, IPC-AR


    UNITED STATES GYPSUM CO — Types C, IP-X2, IPC-AR, ULIX


    USG BORAL DRYWALL SFZ LLC — Type C


    USG MEXICO S A DE C V — Types C, IP-X2, IPC-AR


    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 — Types C, IP-X2, IPC-AR


    UNITED STATES GYPSUM CO — Types C, IP-X2, IPC-AR, ULIX


    USG BORAL DRYWALL SFZ LLC — Type C


    USG MEXICO S A DE C V — Types C, IP-X2, IPC-AR


    9. Finishing System - (Not Shown) — Vinyl, dry or premixed joint compound, applied in two coats to joints and screw-heads. Nom 2 in. wide paper tape embedded in first layer of compound over all joints. As an alternate, nom 3/32 in. thick veneer plaster may be applied to the entire surface of gypsum panels.

    * 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 2018-10-23
BXUV.P562 P562 BXUV 730408054 DESIGN Active 20181023 20181023 730408054 730408054 100039004 100570268 100535881 734845001 682030001 100559121 100559121 846414010 100575661 100238497 114328003 846414010 730408054 P1802957 287840003 846414010 730408054 P1802957 287840003

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