[RE-wrenches] Raised up ground mounts

[Eric Youngren]

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

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 <
> jason at floridasolardesigngroup.com> 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 <lorenzo at cal-solar.com>
>> 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 <
>>> jason at floridasolardesigngroup.com> 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
>>>>
>>>>
>>
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