Thanks for the pitch info, very helpful. Are you using a heavy wall
thickness on the pole? I thought with DP &W we could only go 6 ft out
of the ground without increasing the pole size or adding bracing.
Ray
On 11/13/2012 4:21 PM, [email protected] wrote:
ray,
this has been a learn by trial and error learning experience. i know
12/12 is ok and 5/12 is not... so somewhere in between those two pitch
angles there is change.
the latest pole mount i did was a dpw rack with 3 kW on an 8" pole. i
am attaching a 100 kb pix of this monster!
todd
On Tuesday, November 13, 2012 11:12am, "Ray Walters"
<[email protected]> said:
HI Todd;
That's very interesting. What roof pitch does that happen? I'm
guessing that at a step enough tilt, the frame damage is alleviated?
Also on your tall pole mounts what pole design do you use? I've tried
telescoping type, and guy wires on tall poles.
Ray
On 11/13/2012 12:08 PM, [email protected] wrote:
I have never had good results with roof mounted pv in our heavy
(mount shasta) snow area. the snow tends to creep down the glass
and peel the bottom of the frame off the module... and then the
glass breaks as it has no support in that area.
so, around here... i do pole mounts.... WAY up in the air.
todd
On Tuesday, November 13, 2012 8:04am, "Troy Harvey"
<[email protected]> said:
Hi all,
We have been doing PV installs for years with L-feet and silicone
without problems ever. Even still, gravity flashings seem
attractive in shingle roofs, to provide a second level of
security, and a more professional install (at least in
perception). But the cost of these systems in significant in high
snow load areas where we often have L-feet every 2 feet on center,
to evenly load the structure below. In todays costs, the feet
could cost as much as 33% of the panel value.
I'm wondering what other people are doing in high snow load areas?
Also. I have noticed that there is a flip side to the risks. We
have found that unless you have good quality shingles, on a
preexisting roof, that sometimes the adhesive sticking the
shingles together is stronger than the low quality shingles
themselves - adding risk of trying to shoe horn flashing in after
the fact. Your experience?
thanks,
Troy Harvey
---------------------
Principal Engineer
Heliocentric
801-453-9434
[email protected] <mailto:[email protected]>
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