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. i <br /> � BXUV.L514 - Fire Resistance Ratings -ANSI/UL 263 Page 9 of 1 I <br /> ' ~� staggered. <br /> � Floor Mat Materials*{aptional)—Flaar mat material nom 0.4 in. thick loose laid <br /> = , over the subflaor. Floor tapping thickness a min 1 in. over the floor mat. <br /> UNITED STATES�GYPSUM CO—Type USG Sound Mat <br /> � <br /> 4. Cross Bridging 1 by 4 in. <br /> Note: When the flo I r is constructed using the alternate flaor systems described above, <br /> 1 by 3 in. cross bridging may be used. <br /> � <br /> 5.Waod Joists 2 by 10 in. spac�d 16 in. OC, firestapped. <br /> 6. Resilient Chanriels Forrned of 25 MSG galv steel, spaced 24 in. OC perpendicular <br /> to joists. Channels overlapped at splices 4 in. and fastened ta each joist with 1-1/4 in. <br /> long furring channel screw. <br /> 6A. Steel Framin i Members (Not Shown)*As an alternate ta Item 6, furring <br /> channels and Steel Framing Members clip as described below: <br /> ; <br /> ;� a. Furring Channels Farmed of No. 25 MSG galv steel. 2-318 in. wide by 7/8 in. <br /> ; deep, spaced 24 in� OC perpendicular to jaists. Channels secured ta joists as <br /> described in Item�. Ends af adjaining channels overlapped 6 in. and tied together <br /> with double strand�of No. 18 SWG galv steel wire near each end of overlap. <br /> b. Steel Framing I embers* used to attacfi furrin channels Item a to 'oists Item <br /> , � t ) J t <br /> 5}. Clips spaced 48 in. OC., and secured to alternating joists with No. 8 x 2-1l2 in. <br /> coarse drywall screw through the center grommet. Furring channels are friction fitted <br /> into clips. Adjoining chanriels are overlapped as d"escribed in Item a. Additional clips <br /> required to hold furring channel that supports the wallboard butt jaints, as described <br /> in Item 7. <br /> PAC INTERNATIQNAL INC—Type RSIG 1, - <br /> 7. Gypsum Board*When resilient channeis are used, wallboard installed with long <br /> dimensian perpe�dicular to resilient channels and the side edges of the board located <br /> between joists. Fastened ta resilient channels with 1 in. long wallbaard screws spaced <br /> 12 in. OG. End joints of wallboard{or lath) similarly fastened to additional pieees of <br /> resilient channel to extend a min af 3 in. beyond ends af butt joint. Serew located 3/4 <br /> in.min distance from sides and ll2 in. min from ends of wallboard(or lath) sheets. <br /> _ - ,� When Steel Framing Members'� {Item 6A} are used, wallboard installed with iong <br /> , � dimension perpendicular ta fiuring channels and side jaints of sheet located beneath <br /> : j jvists.Wallboardiscrews are driven through channel spaced I2 in. OC in the field. <br /> Wallboard butt 3omts shall be staggered mm. 2 ft. witlun the assembly, and occur <br /> � between the mairi f.urring channels. At the wallbaard butt joints, each end af the <br /> gypsum board shlall be supported by a single length of furring channel equal to the <br /> , <br /> I <br /> http:lldatabase.ul.comlegi-biniXYVJtemplatetLISEXT/1 FRAME/shawpage.hhnl?name=BXU... 4(19/Q2 <br />