screws or nails for osb sheathing

hi folks, in a follow up to my shed building woes... i'm building a 10x15 shed outside. 2x4 walls, 16in on center... ready to start sheathing (osb, was planning on doing 1/2in) do i nail or screw sheathing in? I have a nail gun, but part of me thinks it should be screwed in... what kind of screws if so?
Thanks!
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My choice would be nails. Screws will tend to break out the back of the OSB on the way in and won't snug down tight to the studs. This can be avoided , if necessary by predrilling the holes and using an impact driver with Torx head screws. For nails, the studs should be straight and plumb. Ring shank nails are the choice these days on many building sites. HTH
Joe
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RedDwarf wrote in

I've put up tons (literally) of OSB sheathing on /Habitat for Humanity/ builds, and we use 8d nails. You can check your local building code, but I tell the volunteers to stretch their thumb an little finger as far as they can, then put nails that far apart in every stud.
Be sure to use a moisture barrier. Down here, we put Tyvek on the outside.
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Steve Bell
New Life Home Improvement
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8d nails, what size is that, every time an American uses this term I have to hunt up a conversion chart. Why use this outdated arbitrary system? Here in Canada the nail companies, including companies that sell on both sides of the border, sell nails by type and length in inches with metric size as well.
I can buy 1 1/2", 2", 2 1/2" 3", 3 1/2, etc. etc, in common (plain shank, not used much anymore) ring (grooves around the shank) ardox (spiral grooves, which are common for construction) along with the other types without having to convert.
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Well, I use it because that's the way they're sold. You're right; it's confusing. I'll be happy to convert as soon as the manufacturers come to their senses. Based on our progress in converting to metric, I'm not going to hold my breath.
The terminology comes from England. "8d" is short for "8-penny". The "d" is apparently the symbol for "pence", by way of "denarius", thanks to the Romans. Way back when, you paid a blacksmith eight pence for 100 nails of this size.
Here's a chart:
http://www.sizes.com/tools/images/Nailsd.gif
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New Life Home Improvement
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On Wed, 26 Nov 2008 21:34:15 +0000 (UTC), "SteveBell"

I don't know the history behind the "d", but was taught that way.
Convert them visually... 8d is shorter than a 16d.... <G>
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replying to EXT, Dude wrote: Oh, pipe down up there
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wrote:

RD-
Where is this project located? Any special wind or seismic issues? Are we building a bunker or a shed?
Steve Bell's suggestion is the way to go. Nails are fast & the right fastener for sheathing
And per EXT's comment....yeah nail diameter and length is the way to spec nails and I've nagging the CE/SE's & contractors I know to stop with the penny designation. But I'm wondering if he'd still complain since I'd spec them in Imperial units :)
8d nails (full head style) can range from .113" dia to .131" dia.
IMO, .113 is a little on the skinny side for sheathing nails but this is pretty normal for 8d gun nails
I prefer .128" or .131" diameter
So for sheathing, imo, the best nail with .131" dia by 2.5" minimum with spacing at about 4" o/c.
I've actually tested the 10d plywood shorts (.148" x ~2.25") are "too short" and tend to pull out under cyclic testing.
But again this is a shed...not a fire station or school
cheers Bob
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