nealtw
Contractor retired
Plan A is for a floor, Plan B is for closing the bottom.
Plan A Use double hdg hanges to hang double 2x10 untreated between the bottom 3 posts
treated between the middle posts.
We always build with 2x10 floor joists 16" on center with hangers between those beams. Cheating the size is up to you.
In order to do that you will have to dig alittle around the middle posts and reshape the fill a little as we don't want any fill sluffing down and pushing against this floor, best would be to have about 6" cleareance under the beam. The water shed I think will be hung from the house so I would be going for an elevation the would put your plywood floor under the door into that shed.
5/8 t&g plywood.
I would rmove the dirt under the shed too and later refill that with gravel so it won't retain water and push against the floor.
Plan A Use double hdg hanges to hang double 2x10 untreated between the bottom 3 posts
treated between the middle posts.
We always build with 2x10 floor joists 16" on center with hangers between those beams. Cheating the size is up to you.
In order to do that you will have to dig alittle around the middle posts and reshape the fill a little as we don't want any fill sluffing down and pushing against this floor, best would be to have about 6" cleareance under the beam. The water shed I think will be hung from the house so I would be going for an elevation the would put your plywood floor under the door into that shed.
5/8 t&g plywood.
I would rmove the dirt under the shed too and later refill that with gravel so it won't retain water and push against the floor.