pre-engineered ground racks [RE-wrenches]

[Dean T. Newberry]

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Hi Jerry, I make racks from Kee Klamp fittings on Standard galvanized 
schedule 40 steel pipe. I use their formulas and submit the complete 
engineering manual with the plan. It works for me.

cul  deant

Jerry Caldwell wrote:

> 
>
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>Thanks for the input Marco, Graham, William & Jeff,
>
>This is going to be a 12kW system on the side of a
>hill that changes slope in the middle of the array
>which I want to remain in one plane.  The lower part
>of the hill is steeper at about 30 degrees and the
>upper part is less steep at about 15 degrees.
>
>I can separate the arry on two racks so that about 3kW
>will be on the 15 degree part of the hill, but the
>rest will have to be over the area where the hill
>changes grade.
>
>I agree that the Pro Solar and DPW products look
>easier and simpler than Unirac, but the Unirac large
>array product looks stronger with the larger pipe &
>cross bracing.  I've also gotten grief from plan check
>engineers at local municipalities in the past and have
>had to over engineer systems on hillsides to
>ridiculous extremes (3'diameter, 10' deep piers for
>top of pole mounts).  Here in Northern California
>there are concerns with erosion and mudslides.  I'm
>hoping a manufacturer's product which has been stamped
>by a licensed engineer for this application will be
>more readily accepted to be installed to the
>manufacturer's recomendations.
>
>Jerry
>
>--- "Jeffery Wolfe, Global Resource Options"
><jeff at globalresourceoptions.com> wrote:
>  
>
>> 
>>
>>Jerry,
>>
>>In your area of the country, you can use the PSP. In
>>snowy areas (or any
>>area you want to elevate the area above the ground
>>by a couple feet or
>>more in the front) you need to use the UniRac ULA
>>system with 2" pipe.
>>From what I know, both systems work fine, just that
>>2" pipe lets you
>>have a longer pipe sticking out of the ground,
>>whereas 1 1/4" pipe does
>>not have enough bending strength to take the longer
>>lengths.
>>
>>Jeff
>>Jeffery D. Wolfe, P.E.
>>NABCEP Certified Solar PV Installer(tm)
>>Global Resource Options, LLP, Solar  Wind  Energy
>>Solutions
>>A Woman-Owned Limited Liability Partnership
>>601 Old River Road, Suite 3, White River Junction,
>>VT 05001-9030
>>
>>-----Original Message-----
>>From: Marco Mangelsdorf [mailto:marco at pvthawaii.com]
>>
>>Sent: Friday, July 23, 2004 9:06 PM
>>To: RE-wrenches at topica.com
>>Subject: RE: pre-engineered ground racks
>>[RE-wrenches]
>>
>>Jerry,
>>
>>I'd go with Stan Ulman and his Professional Solar
>>Products ground-mount
>>hardware (www.prosolar.com).  Stan has done all the
>>necessary
>>engineering for his mounting hardware and is a very
>>helpful guy to deal
>>with.  (And, no, I don't work for PSP.)  Aside from
>>the anodized al.
>>rails and other hardware he supplies, you would be
>>using 1 1/4" gal.
>>pipe as posts sunk in concrete every 10'.  His
>>phone: 800 847-6527.
>>
>>aloha,
>>marco
>>ProVision Technologies, Inc.
>>Hilo, Hawai'i
>>
>>-----Original Message-----
>>From: Jerry Caldwell [mailto:solarcowboy at yahoo.com]
>>Sent: Friday, July 23, 2004 2:58 PM
>>To: RE-wrenches at topica.com
>>Subject: pre-engineered ground racks [RE-wrenches]
>>
>>Wrenches,
>>
>>I need to quote a PV system with a ground rack on
>>the side of a hill.
>>I'm thinking about going with a pre-engineered
>>system like Unirac to
>>save time both with design and installation.  Does
>>anyone have
>>experience with Unirac's large ground rack product
>>or anyone else's for
>>that matter.  Basically, I'm looking for opinions
>>pro or con using a kit
>>system for this application vs. building our own
>>with galvanized pipe &
>>strut.
>>
>>cheers,
>>
>>=====
>>Jerry Caldwell
>>NABCEP Certified PV Installer
>>Light Energy Systems
>>965 Detroit Ave
>>Concord, CA
>>
>>925-680-4343 office
>>510-205-2798 mobile
>>    
>>
>
>=====
>Jerry Caldwell
>NABCEP Certified PV Installer
>Light Energy Systems
>965 Detroit Ave
>Concord, CA
>
>925-680-4343 office
>510-205-2798 mobile
>
>
>	
>		
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	Dean T. Newberry
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