the S-5 solution to standing seam roofs? [RE-wrenches]

[Bruce Geddes]

Hello Marco,
                     Sounds like you guys get all sorts of goodies we in
Kiwi land can only dream of.

The concern that strikes me first off is that of galvanic corrosion.  Being
in a country that experiences lots of coastal marine conditions, salt spray
can cause havoc with these dis-similar metal type of arrangements.  Any
stainless - aluminium contacts should be assembled with a corrosion
inhibitor and if you put ali onto a glavanised roof surface without real
good protection you are asking for trouble.

I am interested to see what the mechanical properties of this clamp are.

Cheers,
Bruce geddes
ARPT
New Zealand

----- Original Message -----
From: "marco mangelsdorf" <marco at pvthawaii.com>
To: <RE-wrenches at topica.com>
Sent: Monday, August 11, 2003 5:53 AM
Subject: the S-5 solution to standing seam roofs? [RE-wrenches]


> Here in Aloha land we've got a lot of standing seam metal roofs.  Rather
> than going down through the flat part of the metal roof to attach PV
> mounting hardware into a structural member (i.e., steel z-bar purlins),
one
> seemingly attractive option would be to use this S-5 clamp from Dynamic
> Fastener.  The S-5 clamp is essentially a machined block of aluminum which
> bites down on the standing seam with a couple of SS bolts.  The mounting
> rails are then bolted down onto the S-5 block.  Have any of you all used
> this kind of hardware?  Have any of you had any engineering done on it in
> terms of pull-off strength in 80+ MPH winds?  Intuitively, this attachment
> means SEEMS pretty solid especially when the alternative is lots of roof
> penetrations into the flat parts of the metal roof.  (FYI: we get an
average
> of 130 inches rain/year here in humid Hilo.)  But then doing commmerical
PV
> systems based on intuition is not a real smart idea...
>
> aloha, marco
>
> Marco Mangelsdorf
> President
> ProVision Technologies, Inc.
> 69 Railroad Avenue, A-7
> Hilo, Hawai'i 96720
> (808) 969-3281, 934-7462 facsimile
> www.provisiontechnologies.com
>
> - - - -
> To send a message: RE-wrenches at topica.com
>
> Archive of previous messages: http://www.topica.com/lists/RE-wrenches/
>
> List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm
>
> Check out participant bios: www.mrsharkey.com/wrenches/index.html
>
> Hosted by Home Power magazine
>
> Moderator: michael.welch at homepower.com
>
>
>

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael_welch at sbcglobal.net

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

TOPICA - Start your own email discussion group. FREE!
http://www.topica.com/partner/tag02/create/index2.html
--^----------------------------------------------------------------