Penetration free standing seam clamps [RE-wrenches]

Wed May 28 17:11:04 PDT 2003

Nick,

We've used the S5 clips on standing seam roofs with UniRac and Tile Trac.
Both are fine. The S5 clamps have enough different holes to accommodate
anything (almost).

There is the issue of the extra point load wind uplift. S5 includes a nice
note about having a structural engineer review all installations. We try to
make sure the roofer has installed "a bunch" (no more scientific than that,
and it does leave me feeling a little "out there") of roof pan hold downs.
Then we install a LOT of S5's. One every rib if we have any doubts, or at a
minimum one every other rib. At $6 a whack, it adds up.

It's a nice system, but I think using a UniRac at a maximum spacing, or even
going to the heavy duty rail to really reduce penetrations, is a better,
cheaper, more sure method.

Matt,

I have not seen the lower labor costs on UniSolar PVL's. Actually, higher
labor costs. Similar overall costs because their is no rack to buy. But each
panel takes my crew of 3 about 20 minutes to laminate and apply a junction
box to (There is a LOT of rolling the laminate out to make it stick well if
you follow (and you better) UniSolar's directions.  A lot slower than
popping racks onto a roof.

I'm not against (and am sometimes for) the UniSolar PVL's, but one reason is
NOT for the labor savings.

Jeff
Jeffery D. Wolfe, P.E.
Principal
Global Resource Options, LLP
A Woman-Owned Limited Liability Partnership
4 Kibling Hill Road
P.O. Box 161
Strafford, VT 05072
800-374-4494 Toll Free
802-765-4632 Phone
802-765-9983 Fax
Jeff at GlobalResourceOptions.com
www.GlobalResourceOptions.com

-----Original Message-----
From: matthew tritt [mailto:solarone at charter.net]
Sent: Wednesday, May 28, 2003 7:01 PM
To: RE-wrenches at topica.com
Subject: Re: Penetration free standing seam clamps [RE-wrenches]

Nick,

Have you considered Unisolar PVL? No clamps, no penetrations, no slipping
and sliding around on the roof, no additional wind loading, better
performance per installed Watt in high temp. (like on a roof) and lower
labor costs.

Matt T
----- Original Message -----
From: "Nick Lucchese" <nickl at sierrasolar.com>
To: <RE-wrenches at topica.com>
Sent: Wednesday, May 28, 2003 4:53 PM
Subject: Penetration free standing seam clamps [RE-wrenches]

>
> --
> Greetings Wrenches,
>   I'm quoting an installation to take place this fall and the
> owners/architects want to utilize the S-5 clamps available at
> lmcurbs.com. This system is new to me and I'm wondering if they can
> be adapted to accommodate the Unirac Solarmount rails. Is it possible
> to run the rails parallel to the seams with this system? It seems
> like a great system to avoid roof penetrations but also seems like a
> lot of extra drag on the roofing panels. Anyone have any hands on
> experience with this method?
>
>    As always, thanks for any helpful insights any of you may have.
> Have a great day.
>
>   Nick A Lucchese
>   Sierra Solar Systems/Planet Home
>   nickl at sierrasolar.com
>
>
>   PS. If anyone thought it was important enough to go out and buy a
> torque driver to properly torque the Sunny Boy AC and DC terminals
> ignore the manual. 35 in. lbs will break the screw, the only torque I
> had success with was about 15 in.lbs. This misprint was confirmed by
> SMA but I have not seen it mentioned yet on the list.
>
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