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Design No. U419 (November 14, 2007) <br />in. thick) shall be attached to furring channels as described in Item 6. One layer of gypsum board panels (1/2 in. <br />Nonbearing Wall Ratings 1, 2, 3 or 4 Hr (See Items 4 & 5) <br />or 5/8 in. thick) attached to opposite side of stud without furring channels as described in Item 6. <br />\` <br />5A. Gypsum Board* — (As an alternate to Item 5) 5/8 in. thick, 24 to 54 in. wide, applied horizontally as <br />4 ` <br />the outer layer to one side of the assembly. Secured as described in Item 6. - Canadian Gypsum Co Type <br />..,....... °-� <br />e <br />SHX.; US Gypsum Co —Type FRX-G, SHX.; USG Mexico S A DE C V —Type SHX. <br />\ ♦ ., r w <br />SB. G sum Board* — As an alternate to Item 5 when used as the base layer on one or both sides of wall, For <br />Yp ( Y <br />? _ <br />direct attachment only, not to be used with Item 3) - Nom 5/8 in, thick lead backed gypsum panels with <br />beveled, square or tapered edges, applied vertically. Vertical joints centered over studs and staggered min 1 <br />, i <br />€ <br />stud cavity on opposite sides of studs. Wallboard secured to studs with 1-1/4 in. long Type S- 12 steel screws <br />„? <br />..JJ.«.....,\\ \\ Al.......A <br />r ....:;; ..... M a...,._ a. _a _..aa a a..., <br />� <br />- - CorpType RB-LBG <br />spaced 8 in. OC at perimeter and 12 in. OC in the field. Ray Bar Engineering p yp <br />- <br />6. Fasteners — (Not shown) For use with Item 2 - Type S or S- 12 steel screws used to attach panels to studs <br />(Item 2) or furring channels (Item 7). Single layer systems: 1 in. long for 1/2 and 5/8 in. thick panels or 1-1/4 <br />in. long for 3/4 in. thick panels, spaced 8 in. OC when panels are applied horizontally, or 8 in. OC along <br />vertical and bottom edges and 12 in. OC in the field when panels are applied vertically. Two layer systems: <br />1. Floor and Ceiling Runners — (Not shown) For use with Item 2 - Channel shaped, fabricated from min <br />First layer- 1 in. long for 1/2 and 5/8 in. thick panels or 1-1/4 in. long for 3/4 in. thick panels, spaced 16 in. <br />25 MSG corrosion -protected steel, min width to accommodate stud size, with min 1 in. long legs, attached to <br />OC. Second layer- 1-5/8 in. long for 1/2 in., 5/8 in. thick panels or 2-1/4 in. long for 3/4 in. thick panels, <br />floor and ceiling with fasteners 24 in. OC max. <br />spaced 16 in. OC with screws offset 8 in. from first layer. Three -layer systems: First layer- 1 in. long for 1/2 <br />IA. Floor and Ceiling Runners* — Not shown - In lieu of Item 1 For use with Item 2A, proprietary <br />in., 5/8 in. thick panels, spaced 24 in. OC. Second layer- 1-5/8 in. long for 1/2 in., 5/8 in. thick panels, spaced <br />channel shaped, min. 3-5/8 in. wide with 1 in. long legs, fabricated from min. 0.0150 in. (0.0146 in., min bare <br />24 in. OC. Third layer- 2-1/4 in. long for 1/2 in., 5/8 in. thick panels or 2-5/8 in. long for 5/8 in. thick panels, <br />metal thickness) galvanized steel, attached to floor and ceiling with fasteners 24 in. OC max. - Dietrich <br />spaced 12 in. OC. Screws offset min 6 in. from layer below. Four -layer systems: First layer- 1 in. long for <br />Industries Inc UltraSTEEL®. <br />1/2 in., 5/8 in. thick panels, spaced 24 in. OC. Second layer- 1-5/8 in. long for 1/2 in., 5/8 in. thick panels, <br />1B. Floor and Ceiling Runners — (Not shown - In lieu of Item 1) For use with Item 2A, proprietary <br />spaced 24 in. OC. Third layer- 2-1/4 in. long for 1/2 in. thick panels or 2-5/8 in. long for 5/8 in. thick panels, <br />channel shaped, min. 2-9/16 in. wide with 1-3/16 in. wide flanges, fabricated from min. 0.0150 in. galvanized <br />spaced 24 in. OC. Fourth layer- 2-5/8 in. long for 1/2 in. thick panels or 3 in. long for 5/8 in. thick panels, <br />steel, attached to floor and ceiling fasteners 24 in. OC. max. - Dietrich Industries Inc UltraSTEEL®. <br />spaced 12 in. OC. Screws offset min 6 in. from layer below. <br />2. Steel Studs — Channel shaped, fabricated from min 25 MSG corrosion -protected steel, min width as <br />6A. Fasteners — (Not shown) —For use with Item 2A - Type S or S- 12 steel screws used to attach panels to <br />indicated under Item 5, min 1-1/4 in. flanges and 1/4 in. return, spaced a max of 24 in. OC. Studs to be cut 3/8 <br />studs (Item 2). Single layer systems: 1 in. long for 1/2 and 5/8 in. thick panels or 1-1/4 in. long for 3/4 in. <br />to 3/4 in. less than assembly height. <br />thick panels, spaced 8-1/2 in. OC with additional screws 1 in. and 2-1/2 in. from edges of the board when <br />2A. Steel Studs* — In lieu of Item 2 - Proprietary channel shaped studs, min. width as indicated under Item 5, <br />panels are horizontally. or 8 in. OC along vertical and bottom edges and 12 in. OC in the field when panels <br />min. 1-1/4 in. long legs and 1/4 in. long folded back return flange legs, fabricated from min. 0.0155 in. <br />are applied vertically. Two layer systems applied vertically: First layer- 1 in. long for 1/2 and 5/8 in. thick <br />(0.0149 in., min bare metal thickness) galvanized steel, spaced a max of 24 in. OC. Studs to be cut 3/8 to 3/4 <br />panels or 1-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC. Second layer- 1-5/8 in. long for 1/2 in., 5/8 <br />in. less than assembly height. Allowable use of studs is shown in the table below. For direct attachment of <br />in. thick panels or 2-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC with screws offset 8 in. from first <br />gypsum board only. - Dietrich Industries Inc U1traSTEEL®. <br />layer. Two layer systems applied horizontally: First layer- 1 in. long for 1/2 and 5/8 in. thick panels or 1-1/4 <br />2B. Steel Studs — (As an alternate to Item 2, For use with Item 513) Channel shaped, fabricated from min 20 <br />in. long for 3/4 in. thick panels, spaced 16 in. OC starting 8 in. from each edge of the board with an additional <br />MSG (0.0327 in. thick) corrosion -protected or galv steel, 3-1/2 in. min width, min 1-1/2 in. flanges and 1/4 in. <br />screw placed 1-1/4 in. from each edge of the board. Second layer- 1-5/8 in, long for 1/2 in., 5/8 in. thick <br />return, spaced a max of 16 in. OC. Studs friction -fit into floor and ceiling runners. Studs to be cut 5/8 to 3/4 <br />panels or 2-1/4 in. long for 3/4 in. thick panels, spaced 16 in. OC starting 8 in. from each edge of the board <br />in. less than assembly height. <br />with an additional screw placed 1-1/4 in. from each edge of the board with screws offset 8 in. from first layer. <br />3. Wood Structural Panel Sheathing — (Optional, For use with Item 5 Only.)- (Not Shown) - 4 ft wide, 7/16 <br />Three -layer systems: First layer- 1 in. long for 1/2 in., 5/8 in. thick panels, spaced 24 in. OC. Second layer - <br />in. thick oriented strand board (OSB) or 15/32 in. thick structural 1 sheathing (plywood) complying with DOC <br />1-5/8 in. long for 1/2 in., 5/8 in. thick panels, spaced 24 in. OC. Third layer- 2-1/4 in. long for 1/2 in., 5/8 in. <br />PSI or PS2, or APA Standard PRP-108, manufactured with exterior glue, applied horizontally or vertically to <br />thick panels or 2-5/8 in. long for 5/8 in. thick panels, spaced 12 in. OC. Screws offset min 6 in. from layer <br />the steel studs. Vertical joints centered on studs, and staggered one stud space from wallboard joints. Attached <br />below. For all layers, an additional screw shall be placed 1-1/4 in. from each edge of the board. Four -layer <br />to studs with flat -head self -drilling tapping screws with a min. head diam. of 0.292 in. at maximum 6 in. OC. <br />systems: First layer- 1 in. long for 1/2 in., 5/8 in. thick panels, spaced 24 in. OC. Second layer- 1-5/8 in. long <br />in the perimeter and 12 in. OC. in the field. <br />for 1/2 in., 5/8 in. thick panels, spaced 24 in. OC. Third layer- 2-1/4 in. long for 1/2 in. thick panels or 2-5/8 <br />4. Batts and Blankets* — (Required as indicated under Item 5) Mineral wool batts, friction fitted between <br />in. long for 5/8 in. thick panels, spaced 24 in. OC. Fourth layer- 2-5/8 in. long for 1/2 in. thick panels or 3 in. <br />studs and runners. Min nom thickness as indicated under Item 5. See Batts and Blankets (BKNV or BZJZ) <br />long for 5/8 in. thick panels, spaced 12 in. OC. Screws offset min 6 in. from layer below. For all layers, an <br />Categories for names of Classified companies. <br />additional screw shall be placed 1-1/4 in. from each edge of the board. <br />4A. Batts and Blankets* — (Optional) Placed in stud cavities, any glass fiber or mineral wool insulation <br />bearing the UL Classification Marking as to Surface Burning Characteristics and/or Fire Resistance. See Batts <br />7. Furring Channels — (Optional, not shown, for single or double layer systems) Resilient furring channels <br />and Blankets (BKNV or BZJZ) Categories for names of Classified companies. <br />fabricated from min 25 MSG corrosion -protected steel, spaced vertically a max of 24 in. OC. Flange portion <br />5. Gypsum Board* — Gypsum panels with beveled, square or tapered edges, applied vertically or horizontally. <br />attached to each intersecting stud with 1/2 in. long Type S- 12 steel screws. Not for use with Item 5A. <br />Vertical joints centered over studs and staggered one stud cavity on opposite sides of studs. Vertical joints in <br />7A. Steel Framing Members (Not Shown)* — (Optional on one or both sides, not shown, for single or double <br />adjacent layers (multilayer systems) staggered one stud cavity. Horizontal joints need not be backed by steel <br />layer systems) As an alternate to Item 7, furring channels and Steel Framing Members as described below: <br />framing. Horizontal edge joints and horizontal butt joints on opposite sides of studs need not be staggered. <br />a. Furring Channels — Formed of No. 25 MSG galv steel. 2-3/8 in. wide by 7/8 in. deep, spaced max. 24 <br />Horizontal edge joints and horizontal butt joints in adjacent layers (multilayer systems) staggered a min of 12 <br />in. OC perpendicular to studs. Channels secured to studs as described in Item b. Gypsum board attached to <br />in. The thickness and number of layers for the I hr, 2 hr, 3 hr and 4 hr ratings are as follows: <br />furring channels as described in Item 6. Not for use with Item 5A. <br />b. Steel Framing Members* — Used to attach furring channels (Item 7Aa) to studs (Item 2). Clips spaced <br />Wallboard Protection on Each Side of Wall <br />max. 48 in. OC. RSIC-1 clips secured to studs with No. 8 x 1-1/2 in. minimum self -drilling, S-12 steel <br />screw through the center grommet. RSIC-V clips secured to studs with No. 8 x 9/16 in. minimum self - <br />Min Min No. of Min <br />drilling, S-12 steel screw through the center hole. Furring channels are friction fitted into clips. - PAC <br />Stud Stud Layers Thkns of <br />International Inc Types RSIC-1, RSIC-V. <br />Depth, Depth, & Thkns Insulation <br />7B. Steel Framing Members (Optional, Not Shown)* — As an alternate to Item 7, furring channels and Steel <br />Rating ( Item 2 Item 2A of Panel Item 4 ) <br />Framing Members on only one side of studs as described below: <br />,..:..... ...,...., .....,.. <br />a. Furring Channels —Formed of No. 25 MSG galv steel spaced 24 in. OC perpendicular to studs. <br />g g P PIP <br />1 ' 3 1/2 3-5/8 1 layer, 5/8 in. thick Optional < <br />Y P <br />Channels secured to studs as described in Item b. Batts and Blankets placed in stud cavity as described in <br />-- - <br />Item 5. Two layers of gypsum board attached to furring channels as described in Item 5. Not for use with <br />1 ? 2-1/2 3-5/8 1 layer, 1/2 in. thick < 1-1/2 in. <br />Item SA. <br />....... W.... ....... <br />1 1 5/8 3-5/8 1 la er, 3/4 in. thick ; O tional <br />Y P <br />b. Steel Framing Members* — Used to attach furring channels (Item 7Ba) to one side of studs (Item 2) <br />only. Clips spaced 48 in. OC. and secured o n r t studs with two No. 8 x 2-1/2 in. coarse drywall screws one <br />" 2 1 5/8 2-1/2 2 layers, 1/2 in. thick Optional > <br />Y P <br />through the hole at each end of the clip. Furring channels are friction fitted into clips. -Kinetics Noise <br /><:::: ........ ......_. ....,.,-- ------ - <br />Control Inc —Type Isomax <br />2 1 5/8 2-1/2 2 layers, 5/8 in. thick Optional <br />8. Joint Tape and Compound — Vinyl or casein, dry or premixed joint compound applied in two coats to <br />........................ .... ...... ... ........ _:.::..... .:.. .:.. <br />2 3 1/2 3-5/8 : 1 layer, 3/4 in. thick 3 m. ` <br />joints and screw heads of outer layers. Paper tape, nom 2 in. wide, embedded in first layer of compound over <br />..................,,,,,,,,, , ,,,,,,,,,,, , ,,,,,,, ..�..�,.. ......,., .:..::.. ........, ........� .....,,,, _,.,.,.,,. ,;:,,,.,, ::,:::,,, ..�..,...,, <br />mitt when sum panels are <br />t r l r t n joint compound may be omitted <br />all joints of outer layer panels. Pape ape and P Y gypsum P <br />3 1 5/8 ! 2-1/2 3 layers, 1/2 in. thick = Optional <br />supplied with a square edge. <br />""""` " "" """`" """` "" "` <br />9. Siding, Brick or Stucco — (Optional, not shown) Aluminum, vinyl or steel siding, brick veneer or <br />3 1 5/8 2-1/2 2 layers, 3/4 in. thick Optional <br />stucco, meeting the requirements of local code agencies, installed over gypsum panels. Brick veneer attached <br />... r--------- . ---- - ........ _..... ; <br />3 1 5/8 2-1/2 3 layers, 5/8 in. thick Optional ; <br />to studs with corrugated metal wall ties attached to each stud with steel screws, not more than each sixth <br />course of brick. <br />4 1 5/8 2-1/2 4 layers, 5/8 in. thick Optional <br />10. Caulking and Sealants* — (Optional, not shown) A bead of acoustical sealant applied around the <br />partition perimeter for sound control. - US Gypsum Co Type AS <br />4 1 5/8 2-1/2 4 layers, I/2 in. thick Optional <br />11. Lead Batten Strips — (Not Shown, For Use With Item 513) - Lead batten strips, min 1-1/2 in. wide, max 10 <br />4 2 1/2 2-1/2 2 layers, 3/4 in thick 2 In <br />ft long with a max thickness of 0.125 in. Strips placed on the interior face of studs and attached from the <br />-.., _ •.,.,, „ ,..••. „ ::: _ <br />exterior face of the stud with two 1 in. long Type S-12 pan head steel screws, one at the top of the strip and <br />one at the bottom of the strip. Lead batten strips to have a purity of 99.9% meeting the Federal specification <br />CANADIAN GYPSUM COMPANY 1/2 in. thick Type C, IP-X2 or IPC-AR; WRC, 5/8 in. thick Type AR, <br />QQ-L-201f, Grade "C". Lead batten strips required behind vertical joints of lead backed gypsum wallboard <br />C, IP-AR, IP-X1, IP-X2, IPC-AR, SCX, SHX, WRX or WRC; 3/4 in. thick Types IP-X3 or ULTRACODE <br />(Item SB) and optional at remaining stud locations. Required behind vertical joints. <br />United States Gypsum CO 1/2 in. thick Type C, IP-X2, IPC-AR or WRC; 5/8 in. thick Type SCX, SHX, <br />12. Lead Discs or Tabs — (Not Shown, For Use With Item SB) -Used in lieu of or in addition to the lead <br />WRX, IP-XI, AR, C, WRC, FRX-G, IP-AR, IP-X2, IPC-AR ; 3/4 in. thick Types IP-X3 or ULTRACODE <br />batten strips (Item 11) or optional at other locations -Max 3/4 in. diam by max 0.125 in. thick lead discs <br />USG MEXICO S A DE C V 1/2 in. thick Type C, IP-X2, IPC-AR or WRC; 5/8 in. thick Type AR, C, IP- <br />compression fitted or adhered over steel screw heads or max 1/2 in. by 1-1/4 in. by max 0.125 in. thick lead <br />AR, IP-Xl, IP-X2, IPC-AR, SCX, SHX, WRX, WRC or; 3/4 in. thick Types IP-X3 or ULTRACODE <br />tabs placed on gypsum boards (Item 513) underneath screw locations prior to the installation of the screws. <br />Lead discs or tabs to have a purity of 99.9% meeting the Federal specification QQ-L-201 f, Grade "C". <br />When Item 713, Steel Framing Members*, is used, Nonbearing Wall Rating is limited to 1 Hr. Min. stud depth is <br />3-1/2 in., min. thickness of insulation (Item 4) is 3 in., and two layers of gypsum board panels (1/2 in. or 5/8 <br />*Bearing the UL Classification Mark <br />UL Details <br />SCALE: NTS <br />System No. W-L-1001 (June 15, 2005) <br />F Ratings —1, 2, 3 and 4 Hr (See Items 2 and 3) T Ratings — 0, 1, 2, 3, and 4 Hr (See Item 3). <br />L Rating At Ambient — less than 1 CFM/sq ft L Rating At 400 F — less than 1 CFM/sq ft <br />SECTION A --A <br />1. Wall Assembly — The 1, 2, 3 or 4 hr fire -rated gypsum wallboard/stud wall assembly shall be constructed <br />of the materials and in the manner described in the individual U300 or U400 Series Wall or Partition <br />Designs in the UL Fire Resistance Directory and shall include the following construction features: <br />A. Studs — Wall framing may consist of either wood studs (max 2 h fire rated assemblies) or steel channel <br />studs. Wood studs to consist of nom 2 by 4 in. (51 by 102 mm) lumber spaced 16 in. (406 mm) OC with <br />nom 2 by 4 in. (51 by 102 mm) lumber end plates and cross braces. Steel studs to be min 3-5/8 in. (92 <br />mm) wide by 1-3/8 in. (35 mm) deep channels spaced max 24 in. (610 mm) OC. <br />B. Gypsum Board* — Nom 1/2 or 5/8 in. (13 or 16 mm) thick, 4 ft. (122 cm) wide with square or tapered <br />edges. The gypsum wallboard type, thickness, number of layers, fastener type and sheet orientation shall <br />be as specified in the individual U300 or U400 Series Design in the UL Fire Resistance Directory. Max <br />diam of opening is 26 in. (660 mm). <br />2. Through -Penetrant — One metallic pipe, conduit or tubing installed either concentrically or eccentrically <br />within the firestop system. The annular space between pipe, conduit or tubing and periphery of opening <br />shall be min of 0 in / (0 mm). (point contact) to max 2 in. (51 mm) Pipe, conduit or tubing to be rigidly <br />supported on both sides of wall assembly. The following types and sizes of metallic pipes, conduits or <br />tubing may be used: <br />A. Steel Pipe — Nom 24 in. (6 10 mm) diam (or smaller) Schedule 10 (or heavier) steel pipe. <br />B. Iron Pipe — Nom 24 in. (6 10 mm) diam (or smaller) service weight (or heavier) cast iron soil pipe, nom <br />12 in (305 mm) diam (or smaller) or Class 50 (or heavier) ductile iron pressure pipe. <br />C. Conduit — Nom 6 in. (152 mm) diam (or smaller) steel conduit or nom 4 in (102 mm) diam (or smaller) <br />steel electrical metallic tubing <br />D. Copper Tubing — Nom 6 in. (152 mm) diam (or smaller) Type L (or heavier) copper tubing <br />E. Copper Pipe — Nom 6 in. (152 mm) diam (or smaller) Regular (or heavier) copper pipe. <br />F. Through Penetrating Product* — Flexible Metal Piping The following types of steel flexible metal gas <br />piping may be used: <br />1. Nom 2 in. (51 mm) diam (or smaller) steel flexible metal gas piping. Plastic covering on piping may <br />or may not be removed on both sides of floor or wall assembly. OMEGA FLEX INC <br />2. Nom 1 in. (25 mm) diam (or smaller) steel flexible metal gas piping. Plastic covering on piping may <br />or may not be removed on both sides of floor or wall assembly. GASTITE, DIV OF TITEFLEX <br />3. Nom 1 in. (25 mm) diam (or smaller) steel flexible metal gas piping. Plastic covering on piping may <br />or may not be removed on both sides of floor or wall assembly. WARD MFG INC <br />3. Fill, Void or Cavity Material* — Caulk or Sealant — Min 5/8., 1-1/4,1-7/8 and 2-1/2 in. (16, 32, 48 and <br />64 mm) thickness of caulk for 1, 2, 3 and 4 hr rated assemblies, respectively, applied within annulus, flush <br />with both surfaces of wall. Min 1/4 in. (6 mm) diam bead of caulk applied to gypsum board/penetrant <br />interface at point contact location on both sides of wall. The hourly F Rating of the firestop system is <br />dependent upon the hourly fire rating of the wall assembly in which it is installed, as shown in the following <br />table. The hourly T Rating of the firestop system is dependent upon the type or size of the pipe or conduit <br />and the hourly fire rating of the wall assembly in which it is installed, as tabulated below: <br />Max Pipe <br />F <br />T <br />or Conduit <br />Rating <br />Rating <br />Diam In (mm) <br />Hr <br />Hr <br />1 (25) <br />1 or 2 <br />0+, 1 or 2 <br />1 (25) <br />3 or 4 <br />3 or 4 <br />4 (102) <br />1 or 2 <br />0 <br />6 (152) <br />3 or 4 <br />0 <br />12 (305) <br />1 or 2 <br />0 <br />When copper pipe e Is used T Rating Is 0 h. <br />P � g <br />3M COMPANY CP 25WB+ or FB-3000 WT. <br />*Bearing the UL Classification Mark <br />System No. HW-S-0001 (December 01, 1999) <br />Assembly Ratings —1 & 2 Hr (See Item 3B) <br />............. <br />ji r` <br />i 13 <br />x <br />4, <br />l r 5 s <br />i l <br />.. ....... ` ........4 - .......... <br />_..... ...:..-.. .. ._____ <br />f s �xt r y v u; <br />5J .t ...�.,,-. <br />f <br />�i <br />.ham. <br />I l4 F <br />i -T <br />, . A. <br />~ .1GI1 A.._ A <br />1. Floor Assembly — The fire -rated fluted steel deck/concrete floor assembly shall be constructed of the <br />materials and in the manner described in the individual Floor -Ceiling Design in the UL Fire Resistance <br />Directory and shall include the following construction features: <br />A. Steel Floor and Form Units* — Max 3 in. deep galv steel fluted floor units. <br />B. Concrete — Min 2-1/2 in. thick reinforced concrete, as measured from the top plane of the floor units. <br />IA. Roof Assembly — As an alternate to Item 1, Floor Assembly, the fire -rated roof assembly shall be <br />constructed of the materials and in the manner described in the individual P700, P800 or P900 series Roof - <br />Ceiling Designs in the UL Fire Resistance Directory and shall contain max 1-1/2 in. deep gale steel fluted <br />roof units. The hourly fire rating of the roof assembly shall be equal to or greater than the hourly fire rating <br />of the wall assembly. In the case of spray -applied protection materials on the steel roof units, the joint <br />system shall be installed prior to the spray -applied protection material. <br />2. Wall Assembly — The 1 or 2 hr fire -rated gypsum wallboard/steel stud wall assembly shall be constructed <br />of the materials and in the manner described in the individual U400-Series Wall and Partition Designs in the <br />UL Fire Resistance Directory and shall include the following construction features: <br />A. Steel Floor And Ceiling Runners — Floor and ceiling runners of wall assembly shall consist of min 25 <br />ga galv steel channels sized to accommodate steel studs (Item 213). Ceiling runner to be provided with 1- <br />1 /2 in. flanges. Ceiling runner secured to valleys of steel floor units (Item 1 A) with steel fasteners or by <br />welds spaced max 12 in. OC. <br />B. Studs — Steel studs to be min 2-1/2 in. wide. Stud spacing not to exceed 24 in. OC. <br />C. Gypsum Board* — Wallboard sheets installed to a min total thickness of 1/2 or 1 in. on each side of <br />wall for 1 or 2 ratings, respectively. Wall to be constructed as specified in the individual Wall and <br />Partition Design in the UL Fire Resistance Directory. Wallboard to be butted tight to the bottom of the <br />steel floor units. <br />3. Joint System — The joint system consists of a forming material and a fill material in the flutes of the steel <br />floor units, as follows: <br />A. Forming Materials* — Min 2-1/2 in. thickness of min 4 pcf density mineral wool batt insulation firmly <br />packed into flutes of steel floor units above ceiling runner as a permanent form. Forming material to be <br />recessed from edges of ceiling runner on each side of wall as required to accommodate the required <br />thickness of fill material. - Thermafiber Inc Type SAF <br />B. Fill, Void or Cavity Material* — Dry mix material mixed with water at a rate of 2.1 parts dry mix to 1 <br />part water, by weight, in accordance with accompanying installation instructions. A min 1/2 in. <br />thickness of fill material installed on each side of the wall in the flutes of the steel floor units, flush with <br />each surface of the wallboard for the 1 hr Assembly Rating. A min 1 in. thickness of fill material is <br />required on each side of the wall for the 2 hr Assembly Rating. - US Gypsum Co Type FC <br />B 1. Fill, Void or Cavity Material* (Not Shown) — 2 component fill material used as an alternate to Item <br />3B. Ready -mixed component mixed with accelerator component at a rate of 66:1 (ready -mixed <br />component to accelerator component by weight) in accordance with the accompanying installation <br />instructions. Applied as described in Item 3B to a min thickness of 1/2 in. for the 1 hr Assembly Rating, <br />and to a min thickness of 1 in. for the 2 hr Assembly Rating. - US Gypsum Co Type RFC <br />*Bearing the UL Classification Mark <br />4 <br />C <br />O <br />E <br />O <br />U <br />L <br />C_ <br />IV -- <br />co <br />00 c0 = <br />m Q <br />V¢ <br />Co ii <br />15. Ui <br />r <br />�+ / m J <br />UJ <br />J = <br />z <br />CU <br />�wTZ <br />U <br />UJ <br />N n- <br />~LU <br />1-N <br />0 <br />a <br />z <br />J O <br />ca <br />UJ 4k <br />�r <br />w ' :: <br />I <br />I' <br />k <br />w <br />