Hi,<br><br>As per Table G3.1 of ASHRAE 90.1- 2004:"Opaque assemblies used for new buildings or additions shall conform with the following common,<b> lightweight assembly types</b> and shall match the appropriate assembly maximum U-factors in Tables 5.5-1 through 5.5-8"<br>
As the code mentioned all the constructions to be lightweight assemblies, my guess is, that only insulation is to be modeled. I hope somebody can throw some more light on this.<br>
<br>Regards,<br><br>Surekha Tetali<br>
<br><div class="gmail_quote"><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Date: Wed, 27 May 2009 17:38:10 +0530<br>
From: sambhav tiwari <<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>><br>
Subject: [Bldg-sim] Roof construction-AppendixG ASHRAE 90.1<br>
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Hello All,<br>
<br>
I am working on a energy simulation model following Appendix G of<br>
ASHRAE 90.1-2004.<br>
In this appendix, table G3.1, under the building envelope category<br>
specifies that for roofs- insulation is entirely above deck but does<br>
not specific the kind of construction. Can I use any kind of material<br>
(like RCC, cast concrete or a metal frame) with insulation above deck<br>
to meet the required U value. Please clarify.<br>
<br>
Thanks & Regards,<br>
<br>
Sambhav Tiwari.<br>
<br>
<br>
------------------------------<br>
<br>
Message: 4<br>
Date: Wed, 27 May 2009 06:07:24 -0700 (PDT)<br>
From: John Aulbach <<a href="mailto:jra_sac@yahoo.com" target="_blank">jra_sac@yahoo.com</a>><br>
Subject: Re: [Bldg-sim] Roof construction-AppendixG ASHRAE 90.1<br>
To: <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>, sambhav tiwari<br>
<<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>><br>
Message-ID: <<a href="mailto:87913.56583.qm@web52805.mail.re2.yahoo.com" target="_blank">87913.56583.qm@web52805.mail.re2.yahoo.com</a>><br>
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<br>
Sambhav:<br>
<br>
My understanding is that you only need put in a simple U-value for the Specification method (see attached Word Document). You then create your actual construction in your Proposed case.<br>
<br>
John Aulbach<br>
<br>
--- On Wed, 5/27/09, sambhav tiwari <<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>> wrote:<br>
<br>
> From: sambhav tiwari <<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>><br>
> Subject: [Bldg-sim] Roof construction-AppendixG ASHRAE 90.1<br>
> To: <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
> Date: Wednesday, May 27, 2009, 5:08 AM<br>
> Hello All,<br>
><br>
> I am working on a energy simulation model following<br>
> Appendix G of<br>
> ASHRAE 90.1-2004.<br>
> In this appendix, table G3.1, under the building envelope<br>
> category<br>
> specifies that for roofs- insulation is entirely above deck<br>
> but does<br>
> not specific the kind of construction. Can I use any kind<br>
> of material<br>
> (like RCC, cast concrete or a metal frame) with insulation<br>
> above deck<br>
> to meet the required U value. Please clarify.<br>
><br>
> Thanks & Regards,<br>
><br>
> Sambhav Tiwari.<br>
> _______________________________________________<br>
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><br>
<br>
<br>
<br>
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