Allan, How bout using 1.5" dia. aluminum rod? letting a machine shop rip it in half and drill hole for thru bolt- solid piece of aluminim to bolt thru - I've seen a variety of diameters for the rod if the 1.5" doesn't fit right. Can't be huge dollars for the machinist to fabricate since it's not a bunch of pieces. Just a thought. Holt E. Kelly Holtek Fireplace & Solar Products 500 Jewell Dr. Waco TX. 76712 254-751-9111 www.holteksolar.com
----- Original Message ----- From: Allan Sindelar To: [email protected] Sent: Friday, March 27, 2009 1:01 AM Subject: [RE-wrenches] Hardware request Wrenches, We have an unusual roof application. It's for a roof-mount array on a commuter rail station canopy in Santa Fe. 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. 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 1½" 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. 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. 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. Thank you for any ideas, Allan Sindelar, Positive Energy ------------------------------------------------------------------------------ _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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