Nail size for floor joists

[davbell22602]

What size nail should I use with 2x6 boards on floor joist for framing them ? 8d or 16d 3 1/2in?

 

[davbell22602]

2x6 boards? What type of floor are you putting down?

4x8 3/4or 5/8 plywood subfloor. Carpet most likely.

 

[nate379]

2x6 joists for a floor? I sure hope they are at least 12" O.C.

Now for the question, to nail the subfloor to the joists? Ring shank 8D is fine, something around 2.5"

 

[davbell22602]

I'm framing up for a floor joists. I'm not ready to put down the subfloor yet. 8d or 16d for framing up floor joists?

 

[Underdog]

Generally 16D nails, if too much penetration then back down to 10D. I like common hd galvanized for hand nailing.

 

[aar0s]

most guys use a 12 or 16 galv. If this is a floor thats going to be carrying any amount of weight above someone walking across it 2x6's arnt going to work.

 

[davbell22602]

This is a old house. I'll be using cinder block to help support the 2x6's. I joist hangers also.

 

[blue dog]

16D for the joist's and 3 nails per block toe nailed to the joist each side of the block, some area's will require teco's from the blocks to the top plate as well and some places will require hurricane straps from each rafter to the wall assembly.

 

[blue dog]

most guys use a 12 or 16 galv.

Galvanized? Not in this neck of the woods, ever.

 

[jkeyser14]

Wow, lots of people hating on 2x6's. My house has 2x6 floor joists on 16" centers and it's been working just fine for several families over the last 60 years. The only thing I've noticed is that my 18"x48"x96" bookshelf full of text books causes the floor to sag about 1/2" as evidenced by the gap under the quarter round molding. There are no cracks on the drywall hanging from them in the basement either.

Oh, and the ends of the 2x6's are notched down to closer to 2x4 where they rest on the cinder block foundation...

 

[Busted_Knuckles]

2x6 joists ?, forget about the centers, the room cant be more than 10' wide ? No ? 2x8s give you a floor that bounces like a trampoline, I thought 2x10s where a mininum... I don't think I have ever seen a 2x6 as a joist.

Anyhow, I screw and glue everything, except joist hangers.

 

[Falcon67]

Our house was built in 1926. Joists are 2x6 on 16 in the front 2x4 on 16 in the back. With proper support and blocking, no problems.

 

[davbell22602]

This room is like 8x12. Small room.

 

[reds]

Our house was built in 1926. Joists are 2x6 on 16 19in the front 2x4 on 16 in the back. With proper support and blocking, no problems.

In 1926 the 2 x 6 floor joists were 2 x 6 or larger and probably fir. Now 2 x 6 are 1 1/2" x 5 1/2" and most are pine.

If you must frame a floor with 2 x 6, they should be 12" on center and every other joist should be doubled to try and avoid deflection. Otherwise 2 x 10" minimum 16" O.C.

 

[davbell22602]

Thanks for the help

 

[Falcon67]

In 1926 the 2 x 6 floor joists were 2 x 6 or larger and probably fir. Now 2 x 6 are 1 1/2" x 5 1/2" and most are pine.

Many of these are sistered with "modern" 2x6s and are the same dimension. They might be fir, but they smell pine when cut, for what that's worth LOL. All the 2x4 rafters in the old part of the house are 3 1/2 x 1 1/2, just like a regular 2x4.

 

[ddawg16]

To answer the original question....if attaching 3/4" plywood to the joist....I would use 8 or 10D nails.....if attaching the joists to anything...use 16D like Blue Dog said.

Building standards have changed a lot over the years.....

The second floor of my garage is built using 2x8 (1.5 x 7.5) 12 OC spanning a little of over 12'. Whereas, my house floor uses the same 2x8 (1.5 x 7.5) 12 OC spanning over 14'. The floor is a bit bouncy.

I'll be doing a 2 story addition this spring....I'm willing to bet that I'll have to use 2x12's on 12 OC to span 14'.