[RE-wrenches] Fwd: Re: Cantilevered array
Christopher Warfel
cwarfel at entech-engineering.com
Mon Feb 12 08:02:31 PST 2024
Hi, in what way? The loading is obviously less, and the clamps are
rated for the load.
On 2/12/2024 10:56 AM, drake.chamberlin at redwoodalliance.org wrote:
>
> How do you deal with the rain gutters?
>
>
> Drake Chamberlin
>
> Media & Communication Action Project
>
> https://m-cap.org/
>
> ---
>
>
> On 2024-02-08 16:46, Sky Sims via RE-wrenches wrote:
>
>> I've designed and installed several thousand cantilevered arrays over
>> the last three decades and never had a single issue. Unfortunately,
>> code changes have taken a turn for the worse in most jurisdictions
>> and oftentimes disallow cantilevering.
>>
>> Sky Sims
>> Https://EcologicalSystems.org
>> 732-462-3858
>>
>>> On Jan 19, 2024, at 3:09 PM, Christopher Warfel via RE-wrenches
>>> <re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>> I've done a fair amount of roof mounted solar structural compliance,
>>> and I would say that the cantilevered design looks like a disaster
>>> waiting to happen. You could not use conventional solar racking
>>> products. Chris
>>>
>>>
>>>
>>> On 1/13/2024 12:42 PM, William Miller via RE-wrenches wrote:
>>>>
>>>> Drake
>>>>
>>>> My earlier reply may have been a bit facetious. What I meant by it
>>>> was that big-box solar contractors can be lazy when it comes to
>>>> solar design. They will rely totally on satellite imagery and not
>>>> check the design on the ground. This is how you get solar proposed
>>>> for shaded areas, where skylights and roof vents are located, or
>>>> overhanging thin air. This may be what is happening in the image
>>>> you shared.
>>>>
>>>> What is unique here is someone actually specified overhanging
>>>> panels. Looking more closely at the image, a roof outline is shown
>>>> but it is not clear that the outline is actually situated over a
>>>> building. It almost looks like there is landscaped area inside the
>>>> outline.
>>>>
>>>> The solution of course is to get on out there, measure the roof and
>>>> any obstructions and analyze the shading. I use the Sun Seeker
>>>> <https://apps.apple.com/us/app/sun-seeker-tracker-surveyor/id330247123>
>>>> app for IOS for the shading analysis.
>>>>
>>>> William
>>>>
>>>> Miller Solar
>>>>
>>>> 17395 Oak Road, Atascadero, CA 93422
>>>>
>>>> 805-438-5600
>>>>
>>>> www.millersolar.com <http://www.millersolar.com/>
>>>>
>>>> CA Lic. 773985
>>>>
>>>> *From:*RE-wrenches
>>>> [mailto:re-wrenches-bounces at lists.re-wrenches.org
>>>> <mailto:re-wrenches-bounces at lists.re-wrenches.org>] *On Behalf Of
>>>> *Drake Chamberlin via RE-wrenches
>>>> *Sent:* Saturday, January 13, 2024 8:47 AM
>>>> *To:* RE-wrenches
>>>> *Cc:* drake.chamberlin at redwoodalliance.org
>>>> <mailto:drake.chamberlin at redwoodalliance.org>
>>>> *Subject:* [RE-wrenches] Fwd: Re: Cantilevered array
>>>>
>>>> **
>>>>
>>>>
>>>>
>>>> **
>>>>
>>>>
>>>>
>>>> **
>>>>
>>>>
>>>>
>>>> **
>>>>
>>>>
>>>>
>>>> Here is a larger snip of the situation.
>>>>
>>>>
>>>> <image001.png>
>>>>
>>>> Label says overhang from upper roof.
>>>>
>>>> /Drake Chamberlin/
>>>>
>>>> /Athens Electric LLC/
>>>>
>>>> /Ohio Electrical Contractor's License 44810/
>>>>
>>>> /NABCEP Certified PV Installation Professional/
>>>>
>>>> ---
>>>>
>>>> On 2024-01-12 07:29, Jason Szumlanski wrote:
>>>>
>>>> Are you sure that's what you're looking at? To me, that looks
>>>> like there was an addition made to the house, and maybe it's a
>>>> multi-pitch roof. That lower part might be a covered
>>>> wrap-around porch.
>>>>
>>>>
>>>> Jason Szumlanski
>>>>
>>>> Principal Solar Designer | Florida Solar Design Group
>>>> NABCEP Certified Solar Professional (PVIP)
>>>> Florida State Certified Solar Contractor CVC56956
>>>>
>>>> On Thu, Jan 11, 2024 at 5:59 PM Drake Chamberlin via
>>>> RE-wrenches <re-wrenches at lists.re-wrenches.org
>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>
>>>> I was given a drawing, produced by a very large solar
>>>> company, showing the array cantilevered over the edge of
>>>> the roof by several feet.
>>>>
>>>> <image002.png>
>>>>
>>>> Notice how the array hangs out over the lawn for several
>>>> feet. Is there anyway that this is a legitimate way to
>>>> mount modules?
>>>>
>>>> Thanks,
>>>>
>>>> Drake
>>>>
>>>> /Drake Chamberlin/
>>>>
>>>> /Athens Electric LLC/
>>>>
>>>> /Ohio Electrical Contractor's License 44810/
>>>>
>>>> /NABCEP Certified PV Installation Professional/
>>>>
>>>> --
>>>>
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>>> --
>>> Christopher Warfel
>>> ENTECH Engineering, Inc.
>>> PO Box 871, Block Island, RI 02807
>>> 401-466-8978
>>> <EEIlogolong.jpg>
>>>
>>>
>>>
>>> <cwarfel.vcf>
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>>
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--
Christopher Warfel
ENTECH Engineering Inc.
PO Box 871, Block Island, RI 02807
401-477-5773
EE Logo <https://entech-engineering.com/Home/default.php>
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