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<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2>Dear Dan,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2>I suppose that you could argue that every upper floor
shades every floor below it. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2>However, </FONT></SPAN><SPAN class=078141217-04092008><FONT
face=Arial color=#0000ff size=2>I think that ASHRAE's intention is to remove
shading considerations from the base case, and make the shading a design /
"Proposed" benefit. With that in mind, you can probably justify treating
the Retail and Office spaces as separate buildings that are physically apart and
don't shade each other.... That's my "seat of the pants" opinion, though,
not a CIR or equivalent.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=078141217-04092008><FONT face=Arial
color=#0000ff size=2>p.s., kudos for the cool high-res graphics! ;)
Pictures help a LOT!</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV class=Section1>
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><B
style="mso-bidi-font-weight: normal"><FONT size=4>The Building Performance
Team<BR></FONT></B><B style="mso-bidi-font-weight: normal">James V. Dirkes II,
P.E., LEED AP<BR></B>1631 Acacia Drive NW<BR>Grand Rapids, MI 49504<BR>616
450 8653<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> bldg-rate-bounces@lists.onebuilding.org
[mailto:bldg-rate-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Dan
Russell<BR><B>Sent:</B> Thursday, September 04, 2008 1:01 PM<BR><B>To:</B>
bldg-rate@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-rate] ASHRAE 90.1
Baseline Shading Itself<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>ASHRAE 90.1-2004 Appendix G Table G3.1.5(a) for Baseline
Building Performance states that “…the building shall be modeled so that it does
not shade itself.”<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I have a medium high rise. Bottom floor is Retail. Next
three floors are parking garage. Rest of floors are office space.
The lowest floor essentially has a roof that is driven on by automobiles and is
shaded by the parking structure.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>||||||||||<o:p></o:p></P>
<P class=MsoNormal>||||||||||<o:p></o:p></P>
<P class=MsoNormal>||||||||||<o:p></o:p></P>
<P class=MsoNormal>||||||||||<SPAN style="FONT-FAMILY: Wingdings">ß</SPAN>Office
space (Conditioned)<o:p></o:p></P>
<P class=MsoNormal>||||||||||<o:p></o:p></P>
<P class=MsoNormal>||||||||||<o:p></o:p></P>
<P class=MsoNormal>||||||||||<o:p></o:p></P>
<P class=MsoNormal>|_______|<o:p></o:p></P>
<P class=MsoNormal>|_______|<SPAN style="FONT-FAMILY: Wingdings">ß</SPAN>Parking
Garage (Unconditioned)<o:p></o:p></P>
<P class=MsoNormal>|_______|<o:p></o:p></P>
<P class=MsoNormal>||||||||||<SPAN style="FONT-FAMILY: Wingdings">ß</SPAN>Retail
space (Conditioned)<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>For the purpose of performing energy simulation compliant
with ASHRAE 90.1-2004 Appendix G, is my baseline model for the first floor
required to have a roof that is fully exposed to solar gains (i.e. unshaded by
the parking structure?) <o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 14pt; COLOR: #a0002f; FONT-FAMILY: Cheltenham"> </SPAN><SPAN
style="FONT-SIZE: 18pt; COLOR: #a0002f; FONT-FAMILY: Cheltenham">Dan Russell,
EIT <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #a0002f; FONT-FAMILY: Cheltenham"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #a0002f; FONT-FAMILY: Cheltenham"><IMG
id=Picture_x0020_1 height=174 alt=cid:image001.jpg@01C840A4.E711B250
src="cid:078141217@04092008-1E66" width=200></SPAN><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV></BODY></HTML>