On pro-solar ground mounts, up in the mountains, we do not use the pinch screw on a Hollender pipe tee. We use pinch screw as a pilot for a bolt. That makes the Engineer happy and he signs it off. Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ [1] e-mail offgridso...@sti.net [2] text 209 813 0060
On Mon, 24 Sep 2018 19:33:37 -0600, Ray wrote: The problem I had with Snap N rack pipe systems is they really can't take any uplift; which is not a good thing in Haiti during a hurricane. Those little pinch screws just are not enough. I would look at other systems. The one you built in Mynamar looks pretty good. Ray Walters Remote Solar 303 505-8760 On 9/24/18 1:07 PM, Eric Youngren wrote: Hi Jason, For the past few years I've been helping build mini-grids in rural Myanmar, where flooding is a regular occurrence in many villages. For one village that floods every year, we specified reinforced concrete posts under the feet of standard ground-mount racks, and also to elevate the power house with batteries and electronics. It works well and was a good fit for that project. See the attached photo. They mixed the concrete on-site using locally available sand, gravel, water and labor. Check out more photos here: https://www.dropbox.com/sh/tolscim2y09e671/AAAUuwLvfWL3X0iYH-WVgn8ma?dl=0 [3] For a big system here in the USA I would look at the SnapNrack series 200, as others have suggested, set atop tall concrete posts. The vertical 1.5" galv pipe legs would go all the way from below grade to the top as the steel reinforcing inside what are basically very tall concrete footings. I'd think 10 or 12" diameter round "sonotube" forms set down below grade as much as the soil conditions require/allow. Use a concrete pumper truck to fill all the tubes with concrete. SnapNrack may have already done the engineering for this type of thing... On Thu, Sep 20, 2018 at 2:15 PM Jason Szumlanski wrote: I wish! 180mph, Exposure Category D - about as bad as it gets in the US. I don't think pole mount will work around here. We need a really beefy structure. It's probably going to have to be custom... and expensive... On Thu, Sep 20, 2018 at 11:10 AM Lorenzo Ortiz wrote: We've used DPW also with good results. We design for 110 mph winds out here and, depending on how high you go, can require some pretty beefy SCH80 8"-10"D pipe. MT Solar might be something to look at too. They make multi-pole mounts for larger arrays but can get a little pricey. Good luck! On Thu, Sep 20, 2018 at 4:55 AM, Jason Szumlanski wrote: Any suggestions for ground mount racks where panels need to have the leading edge 6-8 feet above grade (due to flood level requirement)? Also, high wind area... 100kw system rating. Tilt can be as low as 5-10%. We're getting into carport territory here, but I'm trying to keep the cost reasonable since it won't have a dual function like a carport or shade structure. Jason Szumlanski Florida Solar Design Group _______________________________________________ List sponsored by Redwood Alliance _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org [7] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org [8] List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html [9] List rules & etiquette: www.re-wrenches.org/etiquette.htm [10] Check out or update participant bios: www.members.re-wrenches.org [11] -- Links: ------ [1] http://members.sti.net/offgridsolar/ [2] mailto:offgridso...@sti.net [3] https://www.dropbox.com/sh/tolscim2y09e671/AAAUuwLvfWL3X0iYH-WVgn8ma?dl=0 [4] mailto:ja...@floridasolardesigngroup.com [5] mailto:lore...@cal-solar.com [6] mailto:ja...@floridasolardesigngroup.com [7] mailto:RE-wrenches@lists.re-wrenches.org [8] http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org [9] http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html [10] http://www.re-wrenches.org/etiquette.htm [11] http://www.members.re-wrenches.org
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