Bill: wind strength on fasteners and racking [RE-wrenches]

[keith]

Hey Bill

I read your response to Jeff.

Do you have calculations for uplift, per my last post?

I have a wind load question....is it possible to use self tapping screws
into a corrugated roof that is supported by z bar purling for pv racking
support?  Or is it advisable to drill the 90 degree angle iron that
makes the z bar purling assembly and have threaded rod through the roof?
I feel this might be better to limit the compression on the corrugation
and the roof.  What is the wind rating or perhaps a mechanical engineer
would know how many self tappers x width of screw or just go for
threaded rod and sleep better!

Thanks again

Keith Cronin
Island Energy Solutions
318 A Kuulei Road
Kailua, Hawaii 96734
808-262-3268 Tel
808-263-0338 Fax
www.islandenergy.net

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