<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Allan,<div>As an alternative, DP&W makes an "H" foot mount for corrugated steel roofing. Two legs push down on the troughs and the lag goes into the peak (where it belongs) without compressing the roof. They will custom build them for you based on the peak to trough and trough to trough dimensions. I've used them and they work pretty good.</div><div>Cheers, Bob-O</div><div><br></div><div><br></div><div><br><div><div>On Mar 26, 2009, at 11:01 PM, Allan Sindelar wrote:</div><br class="Apple-interchange-newline"><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> <o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"> <!--[if !mso]> <style> st1\:*{behavior:url(#default#ieooui) } </style> <![endif]--> <style> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman";} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:Arial; color:windowtext;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;} div.Section1 {page:Section1;} --> </style> <div lang="EN-US" link="blue" vlink="purple"> <div class="Section1"><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">Wrenches,<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">We have an unusual roof application. It’s for a roof-mount array on a commuter rail station canopy in <st1:city w:st="on"><st1:place w:st="on">Santa Fe</st1:place></st1:city>. The roof is made up of a coated corrugated steel top layer, in the shape of a series of sine waves, over roofing felt, 5/8” plywood sheathing, and a corrugated metal base called Epicore. The array will be one long single row of modules in portrait mode on Solarmount rails. I’m leaving out some details in order to get to the point. <o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">We intend to base our mounting of the rails on a through-bolt mounting attachment, using threaded rod with the necessary nuts, washers, and sealant layers to create a compressed sandwich approach. The corrugated top layer has peaks and troughs of about 1˝” radius. We’ll use L-feet to mount the module rails to the through-bolts, which will likely be made from 5/16” or 3/8” threaded rod (size to be determined as we work out the details at the site). We will drill through the troughs of the corrugations, rather than the peaks, to avoid compressing the corrugated roofing; drilling the troughs has the project engineer’s approval.<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">What we need is something like half-round anodized aluminum or powder-coated steel stock material. The idea is that the convex round profile fills the corrugated trough, and the flat surface forms a base for the L-foot. We would expect to cut the stock to lengths, say 4-6”, drill one hole through the center cross-section for our through-bolt, and mount the sections in the troughs, one at each through-bolt location.<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">What product, likely used in some other industry or manufacturing process, would work for our half-round stock? The job isn’t big enough to justify a custom extrusion – we probably need two dozen of the finished pieces.<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">Thank you for any ideas,<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">Allan Sindelar, Positive Energy</span></font></p></div></div></o:smarttagtype></o:smarttagtype></div></div></body></html>