<HTML>
<HEAD>
<TITLE>Re: [Bldg-sim] multiple wall constructions for LEED</TITLE>
</HEAD>
<BODY>
<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>In Table G3.1 (#5 Building Envelope) of 90.1-2004, it says that:<BR>
<BR>
“Opaque assemblies...shall conform with the following common, lightweight assembly types and shall match the appropriate assembly maximum U-factors in Tables 5.5-1 through 5.5-8:<BR>
</SPAN></FONT><UL><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Roofs – Insulation entirely above deck
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Above grade walls – steel framed
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Floors – Steel joist”<BR>
</SPAN></FONT></UL><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
So every baseline wall should have the assembly max U-factor for a steel-framed wall. This also allows credit to be taken for having mass walls in your proposed design. <BR>
<BR>
<BR>
On 8/11/08 3:20 PM, "Chien Harriman" <<a href="chien.harriman@iesve.com">chien.harriman@iesve.com</a>> wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><SPAN STYLE='font-size:11pt'><FONT FACE="Arial">Hi all-<BR>
</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">A quick, but kind of hazy question for me at least, regarding LEED projects. Let's just say, that a building is composed of multiple wall types, spanning a range of the ASHRAE 90.1 definitions...some portions of the building is steel framed, another portion is mass wall, and yet another portion is wood framed, for example. In this case, what would the baseline be defined as? Does each wall remain categorically intact, and you simply choose the baseline U-factor that corresponds to that wall type, or do you have to determine the wall type that makes up the majority of the proposed building, and choose this wall type as the baseline wall type? <BR>
</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"> <BR>
</FONT><FONT FACE="Arial">Thanks in advance,<BR>
Chien<BR>
</FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><BR>
<HR ALIGN=CENTER SIZE="3" WIDTH="95%"></FONT></SPAN><FONT SIZE="2"><FONT FACE="Consolas, Courier New, Courier"><SPAN STYLE='font-size:10pt'>_______________________________________________<BR>
Bldg-sim mailing list<BR>
<a href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a><BR>
To unsubscribe from this mailing list send a blank message to <a href="BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</a><BR>
</SPAN></FONT></FONT></BLOCKQUOTE>
</BODY>
</HTML>