Underlayment nails to attach subfloor

I’m using 3/4″ Sturdy Floor over 2×4 truss for a subfloor. The Sturdy Floor manufacture suggests using 6D ring shank nails and glue to attach the subfloor. The smallest ring shank nail my nailer will handle is an 8D which would protrude through the top chord of the truss. I’d rather not have this happen. I have not been able to locate 6D ring shank nails to put in the old fashion way (hammer). I have found something called an underlayment nail which is 1-7/8″ long which is 1/8″ short of the 2″ 6D nail. What do you think about using the underlayment nail?
Replies
Where are you shopping?
6d ringshanks are pretty available.....well, I'm speaking of nails for a framing gun....but I'd think they're available by the #.
I've tried, Menards, Lowes, Home Depot, Barnes Building Materials, Benton Building Center, Spahn & Rose Lumber Co., UBC, Waterloo lumber company, a few of the small town lumber yards... about every lumber and building supply company in the Waterloo Iowa area. I am in disbelief that I cannot find a 6D ring shank nail in this area. I have found a supplier on the internet but only, so far, in 1 lb. boxes.
IMNSHO I'd highly recommend screws - no chance of them popping. Rent a screwgun that has collated strips, sqaure-drive screws are best. (If you're from the States these might be difficult).You can then stand upright and walk around comfortably.
Be careful how you apply glue - and use construction adhesive, not carpenters' glue. glue only the area to be covered by the sheet u r laying - I've seen a whole floor preglued, and the glue set up so that the subfloor was 1/4" off the joists.
cheers
***I'm a contractor - but I'm trying to go straight!***
Bob,
If you choose a nail, an underlayment nail is a great thing.
The difference between an underlayment and a standard ring is that the underlayment nail has a slight bevel under the head. What happens is it allows the head to flush in much easier than a ring so that even the thickness of the head metal doesnt protrude on the sub flooring.
The size is another issue. Maybe you could find your nails online, I know a bunch of guys here buy them that way.
-zen
zendo,
I guess I'll go with the screws as the others suggested but thanks for the details on the underlayment nail head. I was wondering what the difference was. I'll file it away and use that information in the future. Thanks!
The head will seat and finish out smoothly, but the diameter is very much less, and the heads more likely to pop off in a structural use like this instead of merely holding underlayment to subfloor. I vote against underlayment nails for this framing use.
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Do not use the underlayment nails. They are not cement coated and many will back out with the seasonal movement of the wood.
Like pikopete said "screw it".
Dave
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can you borrow someone else's nailer. most framing nailers will a 2" nail. I've used these for nail blocking between plywood seems. your supplier should be able to get 2" rs nails. or you can order them from mcfeely or a similar catalogue.
tyke
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