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i <br /> � BXUV.L502 -Fire Resistance Ratings - ANSI/UL 263 Page 6 of 9 <br /> i <br /> - � <br /> " � <br /> ;; BPB AMERICA I�NC <br /> I <br /> � BPB CELOTEX�Types PDWH, PDWS <br /> " I <br /> � <br /> CHICAGO METALLIC CORP—Types 650, 650C, 670, 670C. <br /> i <br /> 6B. Steel Framing Members* (Not shown)—As an alternate to Items 6 and 6A. <br /> Main runners nom!12 ft long, spaced 48 in. OC. Ends of main runners at walls to rest <br /> on wall angle, witliout attachment, with 1/2 to 3/4 in. end clearance. Primary cross <br /> tees (1-1/2 in. wide across flange) or cross channels, nom 4 ft long, installed <br /> perpendicular to main runners and spaced 24 in. OC. Additional primary cross tees or <br /> cross channels required at each wallboard end joint and 8 in. from and on each side of <br /> wallboard end joint. <br /> � <br /> ARMSTRONG WORLD INDUSTRIES INC—Type DFR-8000. <br /> � <br /> 6C. 5tee1 Framing Members* (Not Shown) As an alternate to Items 6, 6A and 6B - <br /> Main runners, cros;s tees, cross channels and wall angle as listed below: <br /> I <br /> a. Main Runners Nom 10 or 12 ft. long, 15/16 in. or 1-1/2 in. <br /> wide face, spaced 4 ft. OC. Main runners suspended by min 12 <br /> SWG galv steel hanger wires spaced 48 in. OC. Hanger wires to be <br /> ' locateii adjac�nt to main runer/cross tee intersections. Hanger <br /> wires wrapped and twist-tied on 16d nails driven in to the side of <br /> joists at least 5 in. above the bottom face. • <br /> i <br /> b. Cross Tees Nom 4 ft. long, 1-1/2 in. wide face, installed <br /> perpendicular to the main runners, spaced 16 in. OC. Additional <br /> cross tees or cross channels used at 8 in. from each side of butted <br /> wallboard end joints. The cross tees or cross channels may be <br /> riveted or screw attached to the wall angle or channel to facilitate <br /> the ceiling installation. <br /> c. Cross Channels Nom 4 ft. long, installed perpendicular to main <br /> runners, spaced 16 in. OC. <br /> d. Wall Angle or�Channel Painted or galv steel angle with 1 in. <br /> legs o'r channel with 1 in. legs, 1-9/16 in. deep attached to walls at <br /> perimeter of ceiling with fasteners 16 in. OC. To support steel <br /> framing member ends and for screw-attachment of the gypsum <br /> wallboard. <br /> � , <br /> , CGC�INTERIORS,DIV OF <br /> i <br /> � CGCiINC—Type DGL or RX. <br /> � i <br /> ; <br /> i <br /> http://database.ul.com/cgi-bin/XYV/template/LISEXT/1 FRAME/showp age.html?name=BXLJ... 4/19/02 <br />