F, T and L ratings

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=90 BGCOLOR="#006699" TEXT="#080000" bgproperties="fixed" background="050285a1erlcgo.gif"> <div> <FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" ><B>     </B></FONT><FONT SIZE="1" COLOR="#CC9900" FACE="Arial" ><B> </B></FONT><FONT SIZE="2" COLOR="#CC9900" FACE="Arial" ><B> </B></FONT><B>FPT, Inc.</B><B> </B><B> </B><FONT SIZE="1" COLOR="#CC9900" FACE="Arial" ><B> </B></FONT><FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" ><B>                           </B></FONT><FONT SIZE="4" COLOR="#FFFFCC" FACE="Arial" ><B> </B></FONT><FONT SIZE="4" COLOR="#FF0000" FACE="Arial" ><B>F, T and L ratings</B></FONT><FONT SIZE="4" COLOR="#FFFFCC" FACE="Arial" ><B> </B></FONT><FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" ><B>   </B></FONT></div> <div> <B> </B><FONT SIZE="3" COLOR="#FFFFCC" FACE="Arial" ><B>  </B></FONT><FONT SIZE="4" COLOR="#CC9900" FACE="Arial Black" ><B> </B><B> </B></FONT><FONT SIZE="3" COLOR="#CC9900" FACE="Arial" ><A HREF="index.htm" TARGET="_top" TITLE="Fire Protection Technologies, Inc. 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In the hose stream test, after a specified period of burning, the tested assembly is removed from the furnace and exposed to a blast of water from a fireman's hose. ASTM E119 specifies the nozzle size, pressure, duration and distance from the assembly (e.g. for 3 hour test: 30 psi (207 kPa), for 4 hour test: 45 psi (310 kPa), for 1.5 seconds/ft2 of assembly).</div> <bR> <div> <B>The T-Rating</B></div> <bR> <div> Given in hours, it specifies that in the given time the maximum temperature rise on the unexposed surface of the wall or floor assembly on penetrating item and on fill material did not exceed 325°F (162°C) above <U>ambient temperature</U>. Also, the criteria prohibits flame passage through the system and requires acceptable hose stream test. </div> <bR> <div> <B>The L-Rating</B></div> <bR> <div> The L-rating is intended to assist authorities having jurisdiction, and others, in determining the suitability of firestop systems for protection of penetrations and miscellaneous openings in floors and smoke barriers for the purpose of restricting the movement of smoke in accordance with the National Fire Protection Association  (NFPA) of "Code for Safety of Life from Fire in Building Structures", NFPA 101.</div> <bR> <div> UL assigns L rating by measuring the amount of air leakage in cubic feet per minute per square foot of opening (CFM/sq. ft.) through the firestop system at ambient air temperature and/or at 400°F (204°C) air temperature, at air pressure differential of 0.30 in W.C. = 0.000737 atm. = 73.9 Pa =0.56 mm Hg.</div> <div>             L(ft3/min/ft2) = L(CFM/ft2) = 5.08 L(liters/sec/m2) = 0.508L(cm3/sec/cm2)</div> <bR> <div>             </div> <div>             In the 2006 International Building Code (IBC), NFPA101, "Code for Safety of Life from Fire in Building Structures" </div> <div>             smoke protection is provided when less than 5 CFM/sq ft per opening area is allowed, i.e. L <5 ft3/min/ft2=2.5 cm3/cm2/sec </div> <bR> <bR> <div> Copyright © 2006 Fire Protection Technologies, Inc.  All rights reserved</div> <bR> </td> </tr></table></body>