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Anonymous Poster

Pull Out Loading for Smooth Shank Nail

07/07/2009 3:47 PM

Good Afternoon,

Can anyone tell me what the Pull out load rating is for a 3 1/4" smooth shank nail with a .120" diamieter.
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RVZ717
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#1

Re: Nail Pull out Loading

07/07/2009 4:03 PM

It all depends on the material the nail is in.

it'll pull out different in Styrofoam VS hardwood.

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Anonymous Poster
#2
In reply to #1

Re: Nail Pull out Loading

07/07/2009 4:29 PM

The nails will be in a #2 or better spruce 2x6, I should also mention that I need the load for End nailing and Cross nailing
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RVZ717
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#3

Re: Nail Pull out Loading

07/07/2009 4:39 PM

I don't know if attempting to run some calculations is your best bet. I'd suggest setting up a test rig to measure the force required to pull the nail from your exact material, in your different configurations. At least thats what I would do, But I like setting up test rigs and such.

Wood is a tricky material to run anything but the most basic calculations, due to moisture content, grain structure, imperfections (such as a knot), and simple variances of material from tree to tree. I'm not saying it can't be done, but I'd just test it for yourself.

Maybe someone will come along and give you some equations to get you in the ball park.

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#4
In reply to #3

Re: Nail Pull out Loading

07/07/2009 4:43 PM

GA, and it saves me having to write exactly the same thing.

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PWSlack
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#6
In reply to #3

Re: Nail Pull out Loading

07/08/2009 3:41 AM

....either that or the tests will develop the equations that the tester could share with others, perhaps?

OP - there isn't an equation for everything!

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Anonymous Poster
#5

Re: Pull Out Loading for Smooth Shank Nail

07/07/2009 8:59 PM

"For bright common wire nails driven into the side grain of seasoned wood or unseasoned wood that remains wet, the results of many tests have shown that the maximum withdrawal load is given by the empirical equation:

p = 54.12(G5/2)(D)(L) [metric] (7–1a)

p = 7,850(G5/2) (D)(L) [inch–pound] (7–1b)

where p is maximum load (N, lb), L depth (mm, in.) of penetration of the nail in the member holding the nail point, G specific gravity of the wood based on ovendry weight and volume at 12% moisture content (see Ch. 4, Tables 4–2 to4–5), and D diameter of the nail (mm, in.). (The NDS and LRFD use ovendry weight and volume as a basis.)"

Source: Wood Handbook - Wood as an Engineering Material

Download @ http://www.fpl.fs.fed.us/products/publications/several_pubs.php?grouping_id=100&header_id=p

(Click on View pdf)
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