[RE-wrenches] Tight roof layout questions: edge walkway requirements & "small gap" hardware options

[Blair May]

 Using the HIP Sanyos then the area is really more like a 1/2" after you get
a fudge factor in there,~ 36' +/-for your 12 modules.
Sanyo's HIPs are good modules,$$$$,  they have addressed the hi temp issues.
The only issue might be the cantilever from the mounting foot to edge of
module on the rail usually ~18"-24".I don't believe that there is any
requirments for "walk ~ area" as long as there IS a stand off, then one can
have feet under the modules & hold onto the edge. The wiring will be an
issue but you didn't say how many stories the building will be. I like to
maximize the roof area, placement of feet as close to the edge + some
blocking on the first to 2nd truss  on the edges,for additional windage
support + attention to wire securing & watertight feet then the system
shouldn't need any room to walk on.
  contact me off list for the HIP clips as I have a charge of them. TUMP

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Brian
Teitelbaum
Sent: Wednesday, August 25, 2010 2:40 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Tight roof layout questions: edge walkway
requirements & "small gap" hardware options



Hi Mick,

 

To answer part of your post, the DPW Power Rail mid-clamps give you a 3/8"
gap between modules, and the SnapNrack mids give you a 1/2"  gap.

 

I doubt if that will give you much of a walkway though..

 

Brian Teitelbaum

AEE Solar

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mick Abraham
Sent: Wednesday, August 25, 2010 11:09 AM
To: RE-wrenches
Subject: [RE-wrenches] Tight roof layout questions: edge walkway
requirements & "small gap" hardware options

 

Hello, Team~

 

I'm laying out some Sanyo modules on paper. Twelve of them fit the roof with
almost too much perfection: this would be difficult to install as it would
fill the roof "edge to edge" in both directions. Are there consistent
guidelines about the amount of roof edge which must remain uncluttered or is
this mainly driven by the amount of aggravation that the installer is
willing to tolerate? Which organizations would want to influence such
decisions in the Atlanta region? Details are: residential, new construction,
wooden truss type roof framing, finish roofing yet to be decided.

 

I've seen fancy photos of rooftops which are covered edge to edge, but I
suppose those are "building integrated" PV systems instead of discrete
modules mounted above the roofing material. Who decides if those are "OK'
for no walkways compared to a roof that is fully loaded with Sanyo type
modules? How are such decisions made?

 

I like the "top clamp" style mounts but UniRac SolarMount rail systems need
about a 1" gap from one module to the next. Is there anyone with similar
hardware that can get a grip within a smaller gap?

 

Thanks in advance,


Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675

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