Hi Allan,
I get 1/4 x 20 self taping screws from.
I think they are even stronger than the TEK screws.
dynamicfasterner.com
Jay
Peltz power
On Mar 15, 2012, at 9:40 AM, Allan Sindelar wrote:
> Lars,
> This has been addressed before on this list, but its been awhile. #14
> self-tapping ("Tek") screws have phenomenal pull-out strength in standard
> steel purlins. My advice is to research this through your fastener supplier;
> I have seen charts on pull-out strength of various sizes and materials. I
> think you'll find that you can come up with a screw attachment schedule with
> which you'll be satisfied.
> Allan
>
> Allan Sindelar
> [email protected]
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Positive Energy, Inc.
> 3201 Calle Marie
> Santa Fe, New Mexico 87507
> 505 424-1112
> www.positiveenergysolar.com
>
>
>
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