SilverBox
ArboristSite Guru
So I'm considering putting PP 1" thick as the subfloor for the upper story of my barn/shop. What do you all think>? The joists will be rough cut doug fir 2x6s on 16" centers.
Come on you guys... look at this..
1" board 8" wide
Me standing on a 5' span not 16", 5 FEET
At 16" it doesn't even think about flexing as its already double what my beam calculator says it needs to be at 5/4s its 4x stronger then the beam calculator says...
My dad built a small barn back in the early 70's. The upstairs floor was planed 1x12 pine(3/4"), and we loaded it with hay and straw. It never sagged or felt spongy, but had more than 2x6s for joists. The joists is where you need strength, unless the spans are really short.
It wasn't made up. Its still not, I made the test board to check it out. I might slab off one at 5/4s and see what it feels like. Also Big jake has me thinking the 5/4s might give me more shear strength to keep everything nice and square, although I think the shear from 4/4 will be ok. I am going to lay the PP at a 45 to the joists.
My dad built a small barn back in the early 70's. The upstairs floor was planed 1x12 pine(3/4"), and we loaded it with hay and straw. It never sagged or felt spongy, but had more than 2x6s for joists. The joists is where you need strength, unless the spans are really short.
What I want to know is why is their a bottle of whiskey and a shot glass in your work area? Looks like something I'd do.
I was leaning toward the opinion that it realy wouldn't make much difference, untill you said you were going to lay the sub floor diagonal (45*). Laying the floor diagonal your floor boards will be spanning more than the 16" that your joist are laid out at. I've laid several sub floors diagonally with the finish floor perpendicular to the joist, but they were way over the 50 lb live load you're talking about. So I guess I'm still not sure it makes any difference between 4/4 and 5/4 since I've never built anything for a 50 lb load.
I built a 12' x 16' portable building to store my wood working equipment in. I used 3/4" for the sub floor (diagonal), and 3/4 for the finish floor (perpendicular) and it's h3ll for stout. But you may not need that much.
Andy
Enter your email address to join: