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The following floorlceiling assemblies have been tested and achieved the fire endura�ce rating <br />shown for each. <br />�- 45-MINUTE ASSEMBL.Y RATING <br />60-MINUTE ASSEMBLY RATING <br />IO" minimunt <br />I. 48R4 tongue-and-groove span-raled sheaihing <br />(Exposure I) <br />2. Single layer s/e" thicfc Type X gypsum board <br />3. TJI� joisl or open-web truss <br />Notr <br />A single layer of AOQO s�nn-raled shcathing <br />(Expo,um I) over joists at 24" on-center with <br />I'h" ligh[weight conaele or I" o( gypsum con- <br />trcic is an allowed dec� allemative. I( thc joisls <br />am spaced no more than 20" orncenter, a'1: <br />thick gypsum toncrele topping is permiUed. <br />A�5 minute floor/ceiling system is not <br />currenNy used in the United States. <br />REF: ITS Dimdory of Listed Produds: Design <br />TJM/FCA 45-0I and DesignlJM/FCA 45-02 <br />ASSEMBLY A <br />I. Double wood floor <br />2. TJI"' �oizt or open-web truss <br />3. FiMure proledion <br />4. 24" x 48" mcessed lighl fir.lui c <br />S. Cold-rolled channels <br />6. 12" air diRuser <br />7. Thermafiber"' or Pibrex""-FBX or <br />Fibemx°-IF mineral wool blan4�ts <br />8. '/e" ihick acoustical panels, 24" x 24' or <br />24" x 48", s�pported by an approved <br />expused fre-rated suspension syslem <br />REF: NER-148, NGR-200, ICDO ES PFG4354 <br />ASSEMBLY B <br />I. 48/24 tongue-and-giroove span-iated <br />sheathing ([xposurc I) <br />2. Two layers '/i" lhick Typc X gypsum boaixi <br />3. T]Im joist or open-web truss <br />4. Optional 3'/i Uii�k glass 6ber balt insulation <br />(nol shown;, when iesilienl channcis arc used <br />fiEF: NER-148.N[R-2GO.IC60 ES PFC-435A <br />UL Design No. L518 <br />Resilient channels may bc installed belwecn the <br />joists and gypsum boai-� if improved STC and <br />IIC sound ra�ings are desiied. <br />Lightweight concrete or approved gypsum topping with appropriate sheathing can be subsGwted jor the decking material <br />shown in any o(dtese assemblies <br />a�s <br />I <br />