Jeff Randall RC FAB Corporation
2615 Princeton Dr NE Albuquerque, NM 87107 505-503-6459 Cell: 505-288-5552 > He changed the name to RC Fab about a year ago, but when I last talked > with him they were changing the name again. Check RC Fab in Albuquerque, > NM > > > >> I can't find the link to Jeff randles new rack company? >> >> Can someone help me out >> >> Thx >> Jay >> Peltz power. >> >> Sent from my iPhone >> >>> On Jan 10, 2017, at 8:31 PM, Ray Walters <r...@solarray.com> wrote: >>> >>> Hi William; >>> >>> Your link had a glitch, I think this should be it? >>> http://www.millersolar.com/MillerSolar/case_studies/Wind_damage/_wind_damage.html >>> >>> We have DP&W's high wind option which bumped the pole size from 4" to >>> 6" >>> along with heavier hardware throughout. I haven't been to the site >>> yet, >>> but the techs were reporting just the module failed and the rack is >>> still good. I'm going up next week and I'll try to figure this out. >>> This site also has a funnel effect as you mentioned. Higher ridges to >>> the North and South, and this smaller peak between with our rack almost >>> right at the top. >>> Roof mounts actually do seem to be much better; the wind doesn't get >>> behind it, and if the array is set back from the edge, the side edge >>> of >>> the array isn't getting pummeled. >>> Our failure occurred with an angled wind, not perpendicular. Your >>> rack >>> failures look also to have had uneven loading: the way it twisted that >>> top rail off. I almost wonder if these racks aren't hitting some >>> resonance that's causing the rack to twist and torque back and forth >>> repeatedly. You can grab the corner of the array and "pluck" it, then >>> watch it bounce back and forth: that's the simple way to determine its >>> harmonic resonance. >>> >>> R.Ray Walters >>> CTO, Solarray, Inc >>> Nabcep Certified PV Installer, >>> Licensed Master Electrician >>> Solar Design Engineer >>> 303 505-8760 >>> >>>> On 1/10/2017 6:26 PM, William Miller wrote: >>>> Ray: >>>> >>>> I can't say I have a solution to your problem, but I can share some >>>> photos >>>> of two similar failures in case you can glean any information from >>>> them. >>>> See: >>>> http://www.millersolar.com/MillerSolar/case_studies/Wind_damage/_wind_dama >>>> ge.html >>>> >>>> The first failure is a Zomeworks. On the same exact spot we tried a >>>> DPW >>>> TOP. Neither could withstand a funnel effect provided by the >>>> topography. >>>> >>>> At the same location we installed a roof mount as well that has never >>>> failed (to my knowledge, we don't service that customer anymore). >>>> >>>> I think if you have terrain that is tilted in the correct direction a >>>> mount that hugs the ground is best. That is a lay opinion, however. >>>> >>>> William >>>> >>>> >>>> >>>> Lic 773985 >>>> millersolar.com >>>> 805-438-5600 >>>> >>>> -----Original Message----- >>>> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] >>>> On >>>> Behalf Of Ray Walters >>>> Sent: Tuesday, January 10, 2017 2:31 PM >>>> To: RE-wrenches <re-wrenches@lists.re-wrenches.org> >>>> Subject: [RE-wrenches] Solar World Wind Damage >>>> >>>> Greetings All; >>>> >>>> I just had the dreaded call from one of my higher profile commercial >>>> clients: a remote radio repeater station had modules ripped off the >>>> frame >>>> by high winds. >>>> Two SW285s were damaged. The wind was strong enough to rip right >>>> through >>>> the aluminum side rails. We had used the proper stainless 1/4" >>>> bolt hardware with washers on the inside, etc. All the hardware was >>>> still >>>> tight, it just tore the aluminum past the washers. This is not a top >>>> down >>>> clamp system, but uses bolts through the mounting holes on the back of >>>> the >>>> module. This was all on a DP&W rack with high wind option. >>>> In 20 years in business, I've never seen that happen. Is there a >>>> contact >>>> at Solar World? I'm not getting through on the tech support line I >>>> have. >>>> First, I need to know what the wind rating is on the modules blowing >>>> from >>>> the back side, and Second, a suggested fix for the remaining modules. >>>> One module was completely ripped from the frame and thrown 30 yds >>>> (total >>>> destruction), a 2nd one has cracks in the Aluminum, but has not let go >>>> yet. I was thinking of adding some angle aluminum on the inside to >>>> beef >>>> it up. IMHO, the frames are pretty thin aluminum compared to older >>>> modules. I'll share some pics when available. >>>> >>>> As always thanks in advance for your comments, >>>> >>>> -- >>>> R.Ray Walters >>>> CTO, Solarray, Inc >>>> Nabcep Certified PV Installer, >>>> Licensed Master Electrician >>>> Solar Design Engineer >>>> 303 505-8760 >>>> >>>> _______________________________________________ >>>> List sponsored by Redwood Alliance >>>> >>>> List Address: RE-wrenches@lists.re-wrenches.org >>>> >>>> Change listserver email address & settings: >>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> >>>> List-Archive: >>>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.htm >>>> l >>>> >>>> List rules & etiquette: >>>> www.re-wrenches.org/etiquette.htm >>>> >>>> Check out or update participant bios: >>>> www.members.re-wrenches.org >>>> _______________________________________________ >>>> List sponsored by Redwood Alliance >>>> >>>> List Address: RE-wrenches@lists.re-wrenches.org >>>> >>>> Change listserver email address & settings: >>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> >>>> List-Archive: >>>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >>>> >>>> List rules & etiquette: >>>> www.re-wrenches.org/etiquette.htm >>>> >>>> Check out or update participant bios: >>>> www.members.re-wrenches.org >>>> >>>> >>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> www.members.re-wrenches.org >>> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org