Overdriven nails in wood sheathing
Overdriven nails in wood sheathing
(OP)
I've noticed that most people who fasten wood wall sheathing to studs tend to overdrive the nails. Is there a good way to prevent this from occurring? And is a certain amount nail overdrive tolerable?






RE: Overdriven nails in wood sheathing
Overdriving is not critical for non-shearwall areas, but if this happens too much, the strength of a shear wall is compromised and may require the sheathing to be replaced and properly nailed.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Overdriven nails in wood sheathing
Fastener pull-over strength is reduced as well.
RE: Overdriven nails in wood sheathing
Mike has the right idea, but it is nearly impossible to implement with OSB.
Different areas on the OSB are harder/ softer. You might nail one area and blast the nail all the way thru and then in another area have to pull out your hammer and set the nail. It gets very annoying and time consuming to have to keep setting the nails. So, most guys set the gun to counter set the nail a bit.
With ring-shank nails, I dont think it matters much. Tearing off sheathing that is nailed on with ring shank nails from an air nailer is a pain in the ass.
RE: Overdriven nails in wood sheathing
RE: Overdriven nails in wood sheathing
and, most contractors ignore nailing schedules.
RE: Overdriven nails in wood sheathing
RE: Overdriven nails in wood sheathing
RE: Overdriven nails in wood sheathing
If the framer is overdriving the nails badly in OSB sheathing it destroys the edge of the panel. In my mind the panel isn't worht much at that point. After you them remove and replace a few decimated panels I have found they can drive the nails relatively flush on a consistent basis.
I like Rons approach of reducing the thickness to account for the overdriven nail
RE: Overdriven nails in wood sheathing
I think it is more of a concern with ply than with OSB. Once the face lam of ply is broken I think the capacity is degraded. If the guys know your inspector is going to climb on the roof and actually do the inspection, they'll do better. Talk to the building department.
RE: Overdriven nails in wood sheathing
On floors it was glue and nails and with newer style super hard sub floors like Advantech, no need to worry about over driving.The stuff is hard as hell.
RE: Overdriven nails in wood sheathing
RE: Overdriven nails in wood sheathing
I am not saying it is OK to let stuff slide, use your own judgment on your projects, but as far as stuff that makes me toss and turn at night, it is very far down on my list. It would be great to see a structure designed and built so well that all the uplift straps worked and the roof stayed intact but you had buckling or failure of a shear wall. Maybe during one of those big full-scale shake table tests...
RE: Overdriven nails in wood sheathing
BA
RE: Overdriven nails in wood sheathing
I'll simply say this, if I had a nail blow thru, or was set too far, my immediate natural reaction was to re-nail correctly. I was still guilty of setting some nails too far. That's simply the nature of the beast.
Now, what no one should expect is a contractor who is trying to make a buck like the rest of use to take an extra week on the job nailing to a precise schedule and to exactly the right depth. Meanwhile the building is wide open and exposed rain and snow.
RE: Overdriven nails in wood sheathing
*******
BA... they should at least clinch those rows of nails to improve their holding power, otherwise where's your faith in the carpenters, in questioning that they didn't add more nails. They probably used the wrong size too, because today's carpenter understands penny weight to mean length of nail, dia. be damned.
Toad... In earthquake country, some inspectors count the nails, check edge distance and spacing btwn. rows and within the row and use a small straight edge to look at head depth. The code or EoR give the schedule. Some builders have taken to snapping chalk lines and marking the spacing on each sheet to save the fight during inspection.
RE: Overdriven nails in wood sheathing
I plead guilty to the charges I brought upon myself earlier in the thread. I will now bring you up on charges of dead-horsing.
Most OSB sheets and some plywoods have the grid printed on them.
After putting down decks, I used to go into the floor below and drive any missed nails back up thru the top and remove them. Then I would go around telling everyone how great I was at nailing down sheathing.