I am building a shed for a friend that is 6x18x9. The 18 length will be divided in half due to transporting the lumber in my truck. So these will be 10 footers cut down to 9 feet. I’m thinking on using 4x4x9’PT on 8 simpson post base per side then sitting either 2×4 or 2×6 joists on top of the 4×4’s. So to the question, can I use 2×4 or 2×6 PT joist’s. They will only be 6 feet long. Also the post base will be sitting on an existing slab, do I really need to anchor them into the slab. This shed is being built in San Diego between two mobile homes. Not much wind here.
X – – – – – XX – – – – – X one side
X – – – – – XX – – – – – X the other side
Framing studs will be 16 on center and so will the joists and the rafters. The reason I’m using Simpson post bases is due to a drainage problem on the current slab. This will give me a 1 inch seperation between slab and PT4x4.
Replies
Let's take that idea and play with it, save some money and maybe make things a bit better. I'm assuming you don't jhave hundreds of dollars worth of tools to play with, like a hammer drill to seat bolts in.
Instead of spending all that money on backets and laying the 4x4s down, I would use some 3' lengths of 2x4 to raise the floor frame up off the crete slab for drainage. You can slam them into the crete with cut nails or case hards and some PL Premium glue.
the only thing that concermns me with this situation in any version is that critters will get under ther and camp out. A metal hardware screen is in order.
If the slab is off level, another method could be to use 2x10s for the rim joist and 2x6s as drawn hwere for the regular floor joists. That way, you could shave what was necesary to get the perimeter level, doing away with the 6ea 3'2x4 sill blocks. You might even cope out a few dados along the edge fro more drain vent.
Then set the 2x6 floor joists to the tops of the 2x10 with hangers.
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