s!5 Clamps [RE-wrenches]

Wed Mar 26 16:20:00 PDT 2008

	The best solution for S-5 is to mount above the clips but in
most cases that is not possible. The lack of data is because of the
sources that are being used. The roofing distributors do not pay much
attention to pull off loading situations. S-5 and their distributors do
not list pull off testing on standing seam roofs. I do not know if they
have this information. They test pulling along the seam this gives great
values for snow retention but it is an in accurate result for our
purposes. Depending on the seam type and the clip spacing we can make
some basic assumption in this design step but it greatly depends on the
type of roof and strength of the seam. If you pull on say a Butler SMR24
roof with the roof clips spacing at 48" the over clip test shows a
failure at around 900 lbs but if you pull on it mid span the roof will
buckle at half of that value. In the residential world they tend to use
architectural roofs with 6 to 12" roof clip spacing in this instance the
buckling becomes less of an issue but the pull out value of the clip is
normally less since they attach to the decking and not the structural
members some roofers may install this roof type with nails and not
screws. 

	Locating the roof clips normally can be down by inspecting the
under side of the roof and measuring where the roof clips screws come
trough the decking.

	One fairly safe practice is to use one S-5 for every seam you
cross. But sometimes this is over kill.  

Chris Meier

Product Manager

UniRac, Inc.

1411 Broadway Blvd. NE

Albuquerque, NM   87102-1545

Ph:  505-242-6411 

Fx:  505-242-6412

Email:  chrism at unirac.com 

Web:   http://www.unirac.com

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-----Original Message-----
From: Blair May [mailto:tump at hughes.net] 
Sent: Wednesday, March 26, 2008 4:43 PM
To: RE-wrenches-topica. com
Subject: Re: s!5 Clamps [RE-wrenches]

So n using the s5 clips how does 1 locate the clips? I would be very
interested in what the manu says re/ distance of spacing the clips if 1
has the opportunity to suggest stitch/layout of the pan securing clips.
One roofer suggested 6" spacing! That would, if one were to come in
after the roof went down, make it tough to NOT pinch a clamp. - have
always found the lack of documentation severely lacking re/ S5 clips!

Sent via BlackBerry by AT&T

-----Original Message-----

From: Aaron Wellendorf <Aaron at stellarenergy.com>

Date: Wed, 26 Mar 2008 11:36:54 

To:RE-wrenches at topica.com

Subject: RE: s!5 Clamps [RE-wrenches]

TUMP,

Sorry for the confusion. I'm not talking about lags or fastening through

the metal pan itself. The S5 clamps onto the standing seam, but just not

directly on top of (pinching) the location of the roofing clip that

secures the metal pan to the purlin or the wood deck. I have called my

roofer and Dynamic Fasteners (S5 distributor) this morning to verify

that this is the correct. Dynamic Fasteners is working on providing me

documentation.

By the way: my roofer said he has installed S5s directly pinching the

roof clips on his own house 3 years ago. However, he used two roof clips

at each location to fasten to the wood deck. The S5 clamp was installed

directly over only one of the clips. He admitted his mistake in doing

this, but said he has not noticed a problem so far. However, he can't

see if there is a problem because it is all covered up by the roof

metal. Also, the pans on his house are short.

Aaron

-----Original Message-----

From: Blair May [mailto:tump at hughes.net] 

Sent: Wednesday, March 26, 2008 10:22 AM

To: RE-wrenches at topica.com

Subject: RE: s!5 Clamps [RE-wrenches]

I guess I'm missing something here..... just how does one attach the s 5

clip if it is designed to clamp the standing seam of the roof panel? 

"Therefore, place the S5 clamps within a couple inches of the roof clips

but not directly over them." 

Why would I want to use these? Seems like your saying lag thru the panel

kinda like what is done to a shingled roof? Please clarify! Thanks, TUMP

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