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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>My reading of 90.1-2004 does not explicitly disallow external
shading devices. Neither does it clearly define how they might be
accounted for in baseline/proposed models. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The closest thing would be Table G3.1, Section 5. This is
clear about permanent “self-shading” such as overhangs/fins being
allowed for the proposed and not for the baseline. External permanent shading
devices such as local buildings aren’t brought up here.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I believe, at the modeler’s discretion, local
buildings/geographic features with significant shading effects ought to be considered.
Incorporating these in a manner that preserves the intent of the “normalized”
building orientation for the baseline however could prove tricky. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>First, the location and orientation of such external shading
devices would need to be adjusted for each of the four “turns.”
For example, a large skyscraper adjacent to your building’s West in the
proposed should move to the building’s relative North, East, and South as
the building orientation is adjusted for the baseline. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The second and more thorny point to consider is how to account
for that skyscraper’s 2D coordinates relative to the building at each rotation.
I think the most logical route to take would be to maintain the relative X/Y
coordinates from the building footprint’s centroid. This however in
some cases might result in one or more of the rotations placing the skyscraper
ON the modeled building. In such a case, you might take an alternative
approach of adding an additional 30 or so degrees to each rotation, effectively
getting a normalized set of results, but avoiding a physical conflict of
location (i.e. instead of 0,90,180,270 orient at 30,120,210,300 from actual).
Strictly speaking this would violate G3.1,5(a) in wording (as it dictates 90,
180,270 from actual), but not in intent – I would therefore accompany
these averaged results with a written explanation of how such intent is
maintained.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>A caveat: I haven’t tried anything of this sort myself so
I am only speculating at how I would approach this. I’d be very
interested to hear others’ experiences with submitting models accounting
for permanent external shading devices under 90.1.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>~Nick<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img width=119 height=37 id="Picture_x0020_1"
src="cid:image001.jpg@01CA141D.1F704920" alt="cid:489575314@22072009-0ABB"></span><b><span
style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER</span><span style='font-size:7.5pt;color:#CC9900'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>25501 west valley parkway<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>direct 913 344.0036<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>fax 913 345.0617<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Check out our new web-site @ </span></i><span style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span
style='font-size:10.0pt;color:blue'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue'> </span></u><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Chris Yates<br>
<b>Sent:</b> Monday, August 03, 2009 8:33 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] A90.1 local buildings<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>A
quick browse through appendix G doesn't mention local buildings in the shading.
Is it true local buildings aren't considered in the shading calc for A90?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>ta</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
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style='border-collapse:collapse'>
<tr>
<td width=216 rowspan=2 valign=top style='width:162.3pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><img border=0 width=142 height=154 id="_x0000_i1025"
src="cid:image002.jpg@01CA141D.1F704920"><o:p></o:p></p>
</td>
<td width=211 valign=top style='width:158.55pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig>Chris Yates<o:p></o:p></p>
<p class=MsoAutoSig>CEng MCIBSE<o:p></o:p></p>
<p class=MsoAutoSig>Associate <o:p></o:p></p>
<p class=MsoAutoSig>Low Carbon Energy Assessor<o:p></o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig>Zero Energy Design Ltd<o:p></o:p></p>
<p class=MsoAutoSig>10A Portland Place<o:p></o:p></p>
<p class=MsoAutoSig>2-22 Mottram Road<o:p></o:p></p>
<p class=MsoAutoSig>Stalybridge<o:p></o:p></p>
<p class=MsoAutoSig>SK15 3AD<o:p></o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
</tr>
<tr>
<td width=211 valign=top style='width:158.55pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig>T: 0161 3386200<o:p></o:p></p>
<p class=MsoAutoSig>F: 0161 3031281<o:p></o:p></p>
<p class=MsoAutoSig>M: 0791 2668665<o:p></o:p></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig>E: chris@zed-uk.com<o:p></o:p></p>
<p class=MsoAutoSig>W: www.zed-uk.com<o:p></o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
</tr>
<tr>
<td width=216 valign=top style='width:162.3pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><img border=0 width=200 height=81 id="_x0000_i1026"
src="cid:image003.jpg@01CA141D.1F704920"><o:p></o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
<td width=211 valign=top style='width:158.55pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
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<tr>
<td width=216 valign=top style='width:162.3pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><img border=0 width=110 height=88 id="_x0000_i1027"
src="cid:image004.jpg@01CA141D.1F704920"><o:p></o:p></p>
<p class=MsoAutoSig><span style='font-size:8.0pt'>Certificate No: GB16647<o:p></o:p></span></p>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
<td width=211 valign=top style='width:158.55pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><o:p> </o:p></p>
<p class=MsoAutoSig><img border=0 width=110 height=88 id="_x0000_i1028"
src="cid:image005.jpg@01CA141D.1F704920"><o:p></o:p></p>
<p class=MsoAutoSig><span style='font-size:8.0pt'>Certificate No: GB16646</span><o:p></o:p></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0in 5.4pt 0in 5.4pt'>
<p class=MsoAutoSig><o:p> </o:p></p>
</td>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:9.0pt;font-family:"MS Reference Sans Serif","sans-serif";
color:green'><o:p> </o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:9.0pt;font-family:"MS Reference Sans Serif","sans-serif";
color:green'>Please carefully consider the environment before you print this email.<o:p></o:p></span></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'>Company
Registered in England & Wales. Registration No. 5815068<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'>Registered
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