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. M511

April 13, 2018

Unrestrained Assembly Ratings — 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.




    Joist
    Weight Allowable Strength Factored Resistance
    Ma Va Vah Mr Vr Vrh
    (plf) (k-ft) (kip) (kip) (k-ft) (kip) (kip)
    10-i-2 4.16 3.49 1.48 1.03 5.54 2.25 1.57
    10-i-3 5.16 4.56 2.31 1.62 7.24 3.51 2.46
    10-i-4 6.37 5.72 3.61 2.53 9.08 5.48 3.84
    11.875-i-2 4.51 4.28 1.48 1.03 6.79 2.25 1.57
    11.875-i-3 5.59 5.61 2.31 1.62 8.90 3.51 2.46
    11.875-i-4 6.91 7.09 3.61 2.53 11.3 5.48 3.84
    12-i-2 4.53 4.33 1.48 1.03 6.87 2.25 1.57
    12-i-3 5.61 5.68 2.31 1.62 9.02 3.51 2.46
    12-i-4 6.94 7.18 3.61 2.53 11.4 5.48 3.84
    14-i-2 4.90 5.17 1.48 1.03 8.20 2.25 1.57
    14-i-3 6.07 6.80 2.31 1.62 10.8 3.51 2.46
    14-i-4 7.52 8.65 3.61 2.53 13.7 5.48 3.84
    16-i-2 5.27 6.01 1.48 1.03 9.53 2.25 1.57
    16-i-3 6.53 7.92 2.31 1.62 12.6 3.51 2.46
    16-i-4 8.09 10.1 3.61 2.53 16.0 5.48 3.84

    Notation

    Ma - flexural resistance in accordance with Allowable Stress Design

    Va - shear resistance in accordance with Allowable Stress Design at gross section (solid web)

    Vah - shear resistance in accordance with Allowable Stress Design at net section (hole location)

    Mr - flexural resistance in accordance with Load and Resistance Factor Design

    Vr - shear resistance in accordance with Load and Resistance Factor Design at gross section (solid web)

    Vrh - shear resistance in accordance with Load and Resistance Factor Design at net section (hole location)

    1. Flooring Systems —

    System A

      1A. Sub-flooring — Minimum 3/4 in thick tongue-and-groove plywood or oriented-strand board, minimum grade "underlayment". Long edges of board to be perpendicular to joists with ends staggered. The board is to be fastened to the steel joists with 1-1/2 in. long by 0.140 in. diameter ITW Ramset GypFast fasteners installed with an air-powered nailer or with #10 wafer head, self-drilling, self-tapping screws 1-1/2 in. long. Screws shall be spaced 6 in. OC along the perimeter of each sheet and 12 in. OC in the field of each sheet.
      1B. Wall and Partition Facings and Accessories* — (Not shown) Min 1-1/2 in. long fastener pins used to attach sub-flooring (Item 1) to joists. Fasteners spaced 6 in. OC at the perimeter of the boards and 12 in. OC in the field.

      ITW RAMSET — Type GypFast Fastener


      1C. Optional Sound Mat - Floor Mat Materials* — Loose laid over sub-floor. Maxxon Floor Primer to be applied to the surface of the mat prior to the floor topping placement. Refer to manufacturer's instructions regarding the minimum thickness of floor topping over each floor mat material.

      MAXXON CORP (View Classification) — CCQU.R18169


      1D. Optional Finish Flooring - Floor Topping Mixture* — Placed over the Sub-Flooring Item 1A. Min 3/4 in. thickness of floor topping mixture having a min compressive strength of 1000 psi. Mixture shall consist of 3 to 7 gal of water mixed with 80 lbs of floor topping mixture and 1.0 to 2.1 cu ft of sand.

      MAXXON CORP (View Classification) — CCOX.R8477


      RAPID FLOOR SYSTEMS (View Classification) — CCOX.R16096


      System B

      1A. Structural Cement-Fiber Units* OR Building Units* — (Not Shown) — In lieu of the wood sub-flooring described in System A, steel deck and structural cement-fiber units or building units may be installed. The deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, mechanically attached to the top flange of the Joist (Item 2) using self-drilling, self-tapping # 14 screws 1.0 in. long spaced 16 in. apart. Deck overlapped by one corrugation at each splice location. Nominal 19 mm (3/4 in.) thick structural cement-fiber units or building units installed over the steel deck and fastened to the steel joists with #8 self-drilling, self-tapping cement board screws 1-5/8 in. long. Screws shall be spaced 1/2 in. from end joints and 8 in. OC along the end joints, and 1 and 2 in. from side joints and 12 in. OC in the field of each sheet.

      ECTEK INTERNATIONAL INC — Armoroc Panel, Type MegaBoard.


      1B. Optional Sound Mat - Floor Mat Materials* — Loose laid over sub-floor. Maxxon Floor Primer to be applied to the surface of the mat prior to the floor topping placement. Refer to manufacturer's instructions regarding the minimum thickness of floor topping over each floor mat material.

      MAXXON CORP (View Classification) — CCQU.R18169


      1C. Optional Finish Flooring - Floor Topping Mixture* — Placed over the Structural Cement-Fiber Units, Item 1A. Min 3/4 in. thickness of floor topping mixture having a min compressive strength of 1000 psi. Mixture shall consist of 3 to 7 gal of water mixed with 80 lbs of floor topping mixture and 1.0 to 2.1 cu ft of sand.

      MAXXON CORP (View Classification) — CCOX.R8477


      RAPID FLOOR SYSTEMS (View Classification) — CCOX.R16096


      System C

      1A. Steel Deck — Pitch 2.5 in., 0.875 in. deep with 0.030 in. thickness (22 Ga). Attached to joists using self-drilling, self-tapping # 14 screws 1.0 in. long spaced 16 in. apart. Deck overlapped by one corrugation at each splice location.
      1B. Concrete — Normal weight concrete, carbonate or siliceous aggregate, 150 pcf unit weight, 2900 psi compressive strength. Minimum slab thickness 2-3/4 in., minimum deck cover 1-7/8 in.
      1C. Welded Wire Fabric — Minimum 6 in. by 6 in. MW13.3 x MW13.3 placed in the concrete to prevent shrinkage cracks.

      System D

      1A. Steel Deck — Pitch 2.5 in., 0.875 in. deep with 0.030 in. thickness (22 Ga). Attached to joists using self-drilling, self-tapping # 14 screws 1.0 in. long spaced 16 in. apart. Deck overlapped by one corrugation at each splice location.
      1B. Concrete — Light weight concrete, minimum 105 pcf unit weight, 2900 psi compressive strength. Minimum slab thickness 2-3/4 in., minimum deck cover 1-7/8 in.
      1C. Welded Wire Fabric — Minimum 6 in. by 6 in. MW13.3 x MW13.3 placed in the concrete to prevent shrinkage cracks.

      System E

      1A. Steel Deck — 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 TEK screws 10 in OC max.
      1B. Floor Topping Mixture* — Compressive strength to be 3000 psi min. Minimum thickness to be 1 in. as measured from the top plane of the deck. Refer to manufacturer's instructions accompanying the material for specific mix design. An acrylic provided by the floor-topping manufacturer shall be applied to the steel deck prior to the installation of the floor topping mixture at a maximum application rate of 300 ft2/gallon.

      MAXXON CORP — Types D-C, L-R, T-F, CT


      System F

      1A. Sub-flooring — Minimum 3/4 in thick tongue-and-groove plywood or oriented-strand board, minimum grade "underlayment". Long edges of board to be perpendicular to joists with ends staggered. The board is to be fastened to the steel joists with 1-1/2 in. long by 0.140 in. diameter ITW Ramset GypFast fasteners installed with an air-powered nailer or with #10 wafer head, self-drilling, self-tapping screws 1-1/2 in. long. Screws shall be spaced 6 in. OC along the perimeter of each sheet and 12 in. OC in the field of each sheet.
      1B. Wall and Partition Facings and Accessories* — (Not shown) Min 1-1/2 in. long fastener pins used to attach sub-flooring (Item 1A) to joists. Fasteners spaced 6 in. OC at the perimeter of the boards and 12 in. OC in the field.

      ITW RAMSET — Type GypFast Fastener


      1C. Structural Cement-Fiber Units* OR Building Units* — (Not Shown) — In lieu of the wood sub-flooring described in System A, steel deck and structural cement-fiber units or building units may be installed. The deck is to consist of corrugated or fluted steel form units, minimum 9/16 in. deep, 22 MSG painted or galv steel, mechanically attached to the top flange of the Joist (Item 2) using self-drilling, self-tapping # 14 screws 1.0 in. long spaced 16 in. apart. Deck overlapped by one corrugation at each splice location. Nominal 19 mm (3/4 in.) thick structural cement-fiber units or building units installed over the steel deck and fastened to the steel joists with #8 self-drilling, self-tapping cement board screws 1-5/8 in. long. Screws shall be spaced 1/2 in. from end joints and 8 in. OC along the end joints, and 1 and 2 in. from side joints and 12 in. OC in the field of each sheet.

      ECTEK INTERNATIONAL INC — Armoroc Panel, Type MegaBoard


      1D. Alternate Sub-Flooring, Steel Deck — In lieu of the wood sub-flooring described under Item 1A, steel deck may be installed. 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 TEK screws 10 in OC max. An ethylene vinyl acetate adhesive may be applied to the steel deck prior to the installation of the floor topping mixture at a maximum application rate of 0.025 lbs/ft2.
      1E. Optional Finish Flooring - Floor Topping Mixture* — Placed over the Sub-Flooring Items 1A, 1C or 1D. Minimum 3/4 in. thickness of floor topping mixture having a minimum compressive strength of 1800 psi. When placed over Item 1D minimum thickness to be 1 in. as measured from top plane of the deck or floor mat material and compressive strength to be minimum 3000 psi. Refer to manufacturer's instructions accompanying the material for specific mix design.

      UNITED STATES GYPSUM CO — Types LRK, HSLRK, CSD


      USG MEXICO S A DE C V — Types LRK, HSLRK, CSD


      1F. Floor Mat Materials* — (Optional) - Floor mat material loose laid over the subfloor. Refer to manufacturer's instructions regarding the minimum thickness of floor topping over each floor mat material.

      UNITED STATES GYPSUM CO — Types SAM, LEVELROCK® Brand Sound Reduction Board, LEVELROCK® Brand Floor Underlayment SRM-25


      System G

      1A. Sub-flooring — Minimum 3/4 in thick tongue-and-groove plywood or oriented-strand board, minimum grade "underlayment". Long edges of board to be perpendicular to joists with ends staggered. The board is to be fastened to the steel joists with 1-1/2 in. long by 0.140 in. diameter ITW Ramset GypFast fasteners installed with an air-powered nailer or with #10 wafer head, self-drilling, self-tapping screws 1-1/2 in. long. Screws shall be spaced 6 in. OC along the perimeter of each sheet and 12 in. OC in the field of each sheet.
      1B. Wall and Partition Facings and Accessories* — (Not shown) Min 1-1/2 in. long fastener pins used to attach sub-flooring (Item 1) to joists. Fasteners spaced 6 in. OC at the perimeter of the boards and 12 in. OC in the field.

      ITW RAMSET — Type GypFast Fastener


      1C. Floor Mat Materials* — (Optional) — Floor mat material nom 1/8 in. (3mm) thick loose laid over the subfloor. Floor topping thickness shall be a min of 3/4 in. (19mm)

      HACKER INDUSTRIES INC — FIRM-FILL SCM 125


      Alternate Floor Mat Materials - (Optional) — Floor mat material nom 1/4 in. (6mm) thick loose laid over the subfloor. Floor topping thickness shall be a min of 1 in. (25mm)

      HACKER INDUSTRIES INC — Type FIRM-FILL SCM 250


      Alternate Floor Mat Materials - (Optional) — Floor mat material nom 3/8 in. (10mm) thick loose laid over the subfloor. Floor topping thickness shall be a min of 1-1/4 in. (32mm)

      HACKER INDUSTRIES INC — FIRM-FILL SCM 400


      Alternate Floor Mat Materials - (Optional) — Floor mat material nom 3/4 in. (19mm) thick loose laid over the subfloor. Floor topping thickness shall be a min of 1-1/2 in. (38mm)

      HACKER INDUSTRIES INC — Type FIRM-FILL SCM 750


      Alternate Floor Mat Materials - (Optional) — Floor mat material nom 5/64 in. (2 mm) thick adhered to subfloor with Hacker Floor Primer. Primer to be applied to the surface of the mat prior to the placement of floor-topping mixture. Floor topping thickness a min 1 in. over the floor mat.

      HACKER INDUSTRIES INC — Type Hacker Sound-Mat.(HSM1.02)


      Alternate Floor Mat Materials - (Optional) — Floor mat material nom 1/4 in. (6mm) thick adhered to subfloor with Hacker Floor Primer. Primer to be applied to the surface of the mat prior to the placement of a min 1-1/4 in. (32mm) of floor-topping mixture.

      HACKER INDUSTRIES INC — Type Hacker Sound-Mat II. (HSM2.06)


      1D. Metal Lath (Optional) — For use with 3/8 in. (10 mm) or greater floor mat materials, 3/8 in. expanded steel diamond mesh, 3.4 lbs/sq yd placed over the floor mat material. Hacker Floor Primer to be applied prior to the placement of the metal lath. When metal lath is used, floor topping thickness a nom 1-1/4 in. over the floor mat.
      1E. Finish Flooring - Floor Topping Mixture* — Min 3/4 in. thickness of floor topping mixture having a min compressive strength of 1100 psi. Mixture shall consist of 6.8 gal of water to 80 lbs of floor topping mixture to 1.9 cu ft of sand.

      HACKER INDUSTRIES INC — Firm-Fill Gypsum Concrete, Firm-Fill 2010, Firm-Fill 3310, Firm-Fill 4010, Firm-Fill High Strength, Gyp-Span Radiant


      System H

      1A. Sub-flooring — Minimum 3/4 in thick tongue-and-groove plywood or oriented-strand board, minimum grade "underlayment". Long edges of board to be perpendicular to joists with ends staggered. The board is to be fastened to the steel joists with 1-1/2 in. long by 0.140 in. diameter ITW Ramset GypFast fasteners installed with an air-powered nailer or with #10 wafer head, self-drilling, self-tapping screws 1-1/2 in. long. Screws shall be spaced 6 in. OC along the perimeter of each sheet and 12 in. OC in the field of each sheet.
      1B. Wall and Partition Facings and Accessories* — (Not Shown) — Min 1-1/2 in. long fastener pins used to attach sub-flooring (Item 1A) to joists. Fasteners spaced 6 in. OC at the perimeter of the boards and 12 in. OC in the field.

      ITW RAMSET — Type GypFast Fastener


      1C. Vapor Barrier — (Optional) — Commercial asphalt saturated felt, 0.030 in. thick.
      Alternate Vapor Barrier — (Optional) — Nom 0.010 in. thick commercial rosin-sized building paper.
      1D. Finish Flooring* — (Optional) — Min 3/4 in. thickness of any Floor Topping Mixture bearing the UL Classification Marking as to Fire Resistance. See Floor- and Roof-Topping Mixtures (CCOX) category for names of Classified Companies.
      1E. Floor Mat Materials* — (Optional) — Nom. 1/4 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 3/4 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 55/025 and Quiet Qurl 55/025 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 3/8 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 1 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 60/040 and Quiet Qurl 60/040 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 3/4 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 1-1/2 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 65/075, Quiet Qurl 65/075 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 1/8 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 3/4 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 52/013 and Quiet Qurl 52/013 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 1/4 in. entangled net core with a compressible fabric attached to the bottom loose laid over the subfloor. Floor topping thickness shall be a minimum of 1 in.

      KEENE BUILDING PRODUCTS CO INC — Quiet Qurl 55/025 MT and Quiet Qurl 55/025 N MT


      System I

      1A. Sub-flooring — Minimum 3/4 in thick tongue-and-groove plywood or oriented-strand board, minimum grade "underlayment". Long edges of board to be perpendicular to joists with ends staggered. The board is to be fastened to the steel joists with 1-1/2 in. long by 0.140 in. diameter ITW Ramset GypFast fasteners installed with an air-powered nailer or with #10 wafer head, self-drilling, self-tapping screws 1-1/2 in. long. Screws shall be spaced 6 in. OC along the perimeter of each sheet and 12 in. OC in the field of each sheet.
      1B. Wall and Partition Facings and Accessories* — (Not Shown) — Min 1-1/2 in. long fastener pins used to attach sub-flooring (Item 1A) to joists. Fasteners spaced 6 in. OC at the perimeter of the boards and 12 in. OC in the field.

      ITW RAMSET — Type GypFast Fastener


      1C. Vapor Barrier — (Optional) — Nom 0.030 in. thick commercial asphalt saturated felt.
      1D. Finish Flooring — Floor Topping Mixture* — (Optional) — Min 3/4 in. thickness of floor topping mixture, having a min compressive strength of 1000 psi. Refer to manufacturer's instructions accompanying the material for specific mix design.

      DEPENDABLE LLC — Types GSL M3.4, GSL K2.6 and GSL RH


      1E. Floor Mat Materials* — (Optional) — Nom. 1/4 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 3/4 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 55/025 and Quiet Qurl 55/025 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 3/8 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 1 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 60/040 and Quiet Qurl 60/040 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 3/4 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 1-1/2 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 65/075, Quiet Qurl 65/075 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 1/8 in. thick loose laid over the subfloor. Floor topping thickness shall be a minimum of 3/4 in.

      KEENE BUILDING PRODUCTS CO INC — Types Quiet Qurl 52/013 and Quiet Qurl 52/013 N


      Alternate Floor Mat Materials* — (Optional) — Floor mat material Nom. 1/4 in. entangled net core with a compressible fabric attached to the bottom loose laid over the subfloor. Floor topping thickness shall be a minimum of 1 in.

      KEENE BUILDING PRODUCTS CO INC — Quiet Qurl 55/025 MT and Quiet Qurl 55/025 N MT


    System J

    1A. Sub-flooring — Minimum 3/4 in thick tongue-and-groove plywood or oriented-strand board, minimum grade "underlayment". Long edges of board to be perpendicular to joists with ends staggered. The board is to be fastened to the steel joists with 1-1/2 in. long by 0.140 in. diameter ITW Ramset GypFast fasteners installed with an air-powered nailer or with #10 wafer head, self-drilling, self-tapping screws 1-1/2 in. long. Screws shall be spaced 6 in. OC along the perimeter of each sheet and 12 in. OC in the field of each sheet.
    1B. Wall and Partition Facings and Accessories* — (Not Shown) Min 1-1/2 in. long fastener pins used to attach sub-flooring (Item 1A) to joists. Fasteners spaced 6 in. OC at the perimeter of the boards and 12 in. OC in the field.

    ITW RAMSET — Type GypFast Fastener


    1C. Vapor Barrier — (Optional) Nom 0.030 in. thick commercial asphalt saturated felt.
    1D. Finish Flooring — Floor Topping Mixture* — (Optional) Min 3/4 in. thickness of floor topping mixture, having a min compressive strength of 1000 psi. Refer to manufacturer's instructions accompanying the material for specific mix design.

    FORMULATED MATERIALS LLC — — Types FR-25, FR-30, and SiteMix


    1E. Floor Mat Material* — (Optional) — Floor mat material loose laid over the subfloor. Refer to manufacturer's instructions regarding the minimum thickness of floor topping over each floor mat material.

    FORMULATED MATERIALS LLC — Types M1, M2, M3, R1, and R2


    2. Structural Steel Members* — "TotalJoist™" - Minimum 10 in. deep, 18 GA, spaced maximum 24 in. OC. Web stiffeners screwed to both ends of joists using 6 hex head, self-drilling, self-tapping #12 steel screws 1.0 in long and to steel C-shaped assembly tracks using 3 hex-head, self-drilling, self-tapping #12 steel screws 1.0 in. long.

    ISPAN SYSTEMS LP — "TotalJoist™"


    3. Bridging* — "TotalJoist™" snap-on bridging, 1-7/8 in. by 5/8 in. by minimum 20 GA. Bridging installed perpendicular to joists through web holes and located 8 ft 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.
    Optional Bridging* — Used as an alternative to "TotalJoist™" Bridging, 1-7/8 in. by 5/8 in. by minimum 20 GA. Bridging attached to top and bottom chords on each joist and located 8 ft apart or at mid-point of joist for shorter spans. Bridging attached to chords of each joist using 1 hex head, self-drilling, self-tapping #10 steel screw, 3/4 in. long.

    ISPAN SYSTEMS LP — "TotalJoist™" sanap-on, ''TotalJoist™" Bridging


    4. Blocking* — ''TotalJoist™" Blocking, 18 GA. Blocking attached to every second bridging location between joists using 6 hex head, self-drilling, self-tapping #10 steel screws, 3/4 in. long.
    4A. 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 screws on each leg of the angle.

    ISPAN SYSTEMS LP — ''TotalJoist™" Blocking


    5. Batts and Blankets* — Mineral wool insulation, nominal 3 in. thick, nominal density 3.0 lb/cu. ft. Insulation shall rest on the top of the bottom flange of each joist and the top of the resilient channels, and surround the wings on the bottom flange. Joints between batts in adjacent joist spaces shall be staggered and shall line up with resilient channels.

    ROCKWOOL — Acoustical Fire Batt


    6. Resilient Channels — Minimum 26 GA galvanized steel. Channels shall be spaced maximum 12 in. apart and attached to the bottom flange of each joist with one 3/4 in. long pan head self-drilling, self-tapping #10 steel screw. At locations where gypsum board end joints occur, additional resilient 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 12 in.
    7. Gypsum Board* — Nominal 5/8 in. thick, 48 in. wide gypsum board installed with long dimension perpendicular to resilient channels. Gypsum board shall be attached to resilient channels using 1 in. long Type S drywall screws, spaced 8 in. OC in the field of each board. At the side joints, screws shall be located 1-1/2 in. and 4 in. from the board edge. At the end joints, screws shall be located 3 in. and 12 in. from the board end.

    CGC INC — Type C


    UNITED STATES GYPSUM CO — Type C, ULIX


    USG BORAL DRYWALL SFZ LLC — Type C


    USG MEXICO S A DE C V — Type C


    8. 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.

    * 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 2018-04-13
BXUV.M511 M511 BXUV 100560153 DESIGN Active 20180413 20180413 100100225 720780001 720780001 131207001 100541211 720780001 720780001 131207001 720780001 100100225 100541211 730408054 287840003 730408054 100100225 130869004 130869004 130869004 130869004 130869004 130869004 130869004 100100225 100057537 100057537 100057537 100057537 100057537 100100225 100607358 100057537 100057537 100057537 100057537 100057537 100100225 P1751555 P1751555 100560153 100560153 100560153 P1798035 846414005 730408054 P1802957 287840003

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