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Re: screws in wood diaphgragm

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Aren't screws less flexible and more brittle than nails? I have seen
screws snap off whereas nails will rather easily bend.

Stan Scholl, P.E.
Laguna Beach, CA

On Sun, 28 Jan 2007 11:43:48 -0500 "Andrew Kester, PE"
<akester(--nospam--at)> writes:
> Joseph,
> I did not find anything in the 2005 NDS about screws in wood 
> diaphragms but they do have values for gypsum attached with screws. 
> I think it would be ok if the screw diameter, head, and strength 
> could be matched up with a nail size in the diaphgram tables, you 
> could use that value. The resulting diaphgram would likely be 
> stiffer with less deflection because you don't have as much nail 
> slip, and your uplift resistance would go up. I would think you will 
> make a GC pretty upset though, that is a lot slower than a nail gun.
> Maybe Buddy at APA or their website would answer this more 
> definitively..
> Andrew
> Andrew Kester, PE
> ADK Structural Engineering, PLLC
> Lake Mary, FL

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