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�• � BXUV.L514 - Fire Resistance Ratings -ANSWL 263 Page 2 of 11 <br /> - �� <br /> � ' System No. 1 <br /> Finish Flooring� 1 by 3 in. T&G and end matched, laid perpendicular to joists; or <br /> 19/32 in. thick plywood or oriented strand board (OSB)wood structural panels ,min <br /> grade "Underlaym�nt" or "Single Floor". Face grain of plywood or strength axis of <br /> panel to be perpendicular to joists with joints staggered. <br /> Vapor Barrier�Commercial rosin-sized building paper, 0.010 in. thick. <br /> I <br /> Subflooring— 1 by 6 in. T&G, fastened diagonally to joists; or 15/32 in. thick <br /> plywood or 7/16 iri. thick oriented strand board(OSB)wood structural panels ,min <br /> grade "C-D" or "Sheathing". Face grain of plywood or strength axis of panel to be <br /> � perpendicular to joists with joints staggered. <br /> System No. 2 <br /> Finish Flooring i Floor Topping Mixture*—6 gal max of water to 1001bs of <br /> floor topping mixture. Compressive strength 1500 psi min. Thickness 3/4 in. min. <br /> , i <br /> ;� UNITED STATES GYPSUM CO—Levelrock 2500, Levelrock RH <br /> � <br /> �� Vapor Barrier—(Optional)—Commercial asphalt saturated felt 0.030 in. thick. <br /> ; <br /> � 5ubflooring— 19/32 in. thick wood structural panels, min grade "C-D" or <br /> "Sheathing". Face�grain of plywood or strength axis of panels to be perpendicular to <br /> joists with joints staggered. <br /> '� Floor Mat Materials* (Optional)—Floor mat material nom 0.4 in. thick loose laid <br /> �� over the subfloor. Floor topping thickness a min 1 in. over the floor mat. <br /> �l iJNITED STATES GYPSUM CO—Type USG Sound Mat <br /> System No.3 <br /> , Finish Flooring—Floor Topping Mixture*—6 gal. max of water to 1001bs. of <br /> ;; floor topping mixture. Compressive strength to be 1500 psi min. Thickness to be 1 in. <br /> �� min. <br /> r <br /> �� UNITED STATES GYPSUM CO—Levekock 2500, Levelrock RH <br /> Metal Lath—For use with floor mat materials, 3/8 in. expanded steel diamond <br /> mesh, 3.41bs/sq yd placed over the floor mat material. <br /> - Vapor Barrier—(Optional)—Commercial asphalt saturated felt 0.030 in. thick. <br /> Subflooring— 1 S/32 in. thick wood structural panels,min grade "C-D" or <br /> "Sheathing". Face grain of plywood or strength axis of panels to be perpendicular to <br /> I <br /> i <br /> http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/showpage.html?name=BXU... 4/19/02 � <br />