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Re: Ring Shank Nails

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The old load values were developed from "static", one direction, load tests. (which is how we wound up with GWB shearwall sheathing). After observing many shearwall failures in earthquakes, we moved into cycled load testing. One thing that became apparent was that nail ductility was much more important than we had realized. One of the great virtues of sheathed shearwalls is their damping ability. If you are really curious about the difference between smooth shanks & ring shanks, get a vice and a hammer and try bending them back and forth a few times. I suspect you will be shocked.
Chuck Utzman, P.E.

On 4/6/2015 11:58 AM, Joseph Gmail wrote:
ICBO used to have a document available, NER 272 which contained diaphragm
and shear wall values for different sheathing thicknesses and nail types.
I believe they included deformed shank nails. However, I don't know if it is still accepted or it might be listed by a different designation.


Joseph Grill

On Apr 6, 2015, at 10:09 AM, Drew Morris <dmorris(--nospam--at)> wrote:

In the shear wall tables of the 2009 IBC they specifically list common
nails and give the required minimum diameter and length.
On 4/5/2015 7:47 AM, Thor Tandy wrote:
I was asked recently if ring shank nails are usable in shear wall design. They have a smaller shank thank smooth but the thread is said to provide better withdrawal capacity .? Any comment? If they are usable what equivalent shank diameter would one use to compare the performance?

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