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<DIV><FONT size=2 face=Arial>Allan,</FONT></DIV>
<DIV><FONT size=2 face=Arial>In most of California (seismic zone 4) residential
PV systems with solar arrays weighing less than 4 lb/ft2 do not require
structural engineering if the roof has one layer of composition shingles. The
reasoning is that roofs are allowed 2 layers of shingles (old set and re-roof
set) and a layer of shingles weighs 4 lb/ft2 so 1 shingle layer and 1 solar
array weighing less than 4 lb/ft2 is within the dead weight load limit. Hope
this helps.</FONT></DIV>
<DIV><FONT size=2 face=Arial>Joel Davidson</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=allan@positiveenergysolar.com
href="mailto:allan@positiveenergysolar.com">Allan Sindelar</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">'RE-wrenches'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, July 07, 2009 5:26
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Roof Loading
request for help</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Wrenches,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">We are currently facing a city
permitting bureaucracy that has recently discovered solar – that is, suddenly
each department in the permitting and plan review departments is coming up
with standards for PV systems. Some of the standards, of course, make no
sense. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">PV systems typically add about
three pounds per square foot to the loading on a roof. We are facing a city
requirement for structural engineering work for standard roof
attachment if the mounting approach is to make penetrations into the roof
structure. This is a typical requirement that will only add considerable cost
to each PV system, and we’re looking to have our ammunition to fight this well
stocked in advance. Specifically, are building authorities in other
jurisdictions requiring structural engineering work for this type of
roof attachment?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Thanks
</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Allan<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=3 face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt">Allan Sindelar<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face="Times New Roman"><SPAN
style="FONT-SIZE: 10pt"><A
href="mailto:Allan@positiveenergysolar.com">Allan@positiveenergysolar.com</A></SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT size=2 face="Times New Roman"><SPAN
style="FONT-SIZE: 10pt">NABCEP Certified Photovoltaic
Installer</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT size=2 face="Times New Roman"><SPAN
style="FONT-SIZE: 10pt">EE98J Journeyman
Electrician</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT size=3 face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt">Positive Energy, Inc.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=3 face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt">3201 Calle Marie<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><FONT size=3
face="Times New Roman"><SPAN style="FONT-SIZE: 12pt">Santa
Fe</SPAN></FONT></st1:City>, <st1:State w:st="on">New Mexico</st1:State>
<st1:PostalCode w:st="on">87507</st1:PostalCode></st1:place><o:p></o:p></P>
<P class=MsoNormal><FONT size=3 face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt">505 424-1112<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><A
href="http://www.positiveenergysolar.com">www.positiveenergysolar.com</A></SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT size=3 face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV>
<P>
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