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RE: Wood Shear Wall Nailing

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Nails (box/  common) are basically prescriptive in the Codes.  Says what we can use for stress/ spacing, and dimensional specs are available.
As someone pointed out, nail gun nails differ in diameter, sometimes length, and some have clipped heads.  But they are of a higher strength (100 ksi or so).
 
Technically speaking, the gun nails should have an ICC evaluation report providing size, load capacities, etc, just like the reports  we use for anchors.  Then use those for calculated load, size spacing etc.  This is a good one to see:
 
 
One thing that almost everyone overlooks in the process is that any product used on site must, per code , have the report available on that site so the the product can be matched with the description and the inspector can verify that the specified product is being used.  Used to be req'd anyway.
 
JDC
 
 

>>> "Jeff Smith" <jeffsmith7(--nospam--at)comcast.net> 7/23/2008 12:28 PM >>>
Anyone think that shear wall nails that require special inspection should be
required to have the heads marked by color coding or some other ID? I have
seen some of these used.
Jeff 

-----Original Message-----
From: Bill Allen [mailto:T.W.Allen(--nospam--at)cox.net]
Sent: Wednesday, July 23, 2008 7:52 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Wood Shear Wall Nailing

"Who knows what they use in nail guns."?

You should know.

Here's what I do:

The QA part:
I put a "nail table" on my drawings which defines the nail dimensions. One
column is what I call the nail on the drawings (8d, 10d, etc.), the second
column is the diameter of the nail for the purposes of the drawings and
subsequent columns are minimum length of nail depending what is being nailed
(1/2" WSP, 3/4" T&G, 2x, etc.) to achieve minimum penetration (10D).

The QC part:
During my structural observation, I have the framer pull an edge nail at
random from a shear wall. I then measure the diameter with my micrometer.
It's always an exciting moment when I announce my results.

FWIW, what I've found is that a popular gun nail is a 10d short (0.148"
diameter x 1-1/2" long).

Regards,

T. William (Bill) Allen, S.E.
ALLEN DESIGNS
Consulting Structural Engineers

> -----Original Message-----
> From: Drew Morris [mailto:dmorris(--nospam--at)bbfm.com]
> Sent: Tuesday, July 22, 2008 1:00 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: Wood Shear Wall Nailing
>
> Michel Blangy wrote:

<snip>

> Who knows what they use
> in nail guns.

<snip>


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