shed slab

[bigtiller]

The perimiter of the slab should be thicker than 4 inches to support the weight of the shed. 8" thick and 16" wide should be about right.

 

[lovemytoys]

The perimiter of the slab should be thicker than 4 inches to support the weight of the shed. 8" thick and 16" wide should be about right.

24" or 16" rebar on center?

 

[Duffster]

24" or 16" rebar on center?

24" is plenty with an extra run in the perimeter curb.

 

[wrooster]

I agree with the comments above regarding using a gravel base for the slab. Ideally you'd use a block foundation as well -- but otherwise to support the walls you are going to have to pour thicker at the perimeter and use rebar.

A couple of other thoughts...

1) Make sure the slab is pitched towards the door to a) prevent any water from coming in, and b) allowing water to get out if it does get in.

2) Consider an apron in front of the shed, which allows your project area to "spill out" onto the apron when the weather is nice. This effectively increases the usable floor space when it's not raining/snowing, and therefore you can get away with a smaller shop.

3) Pour a sidewalk-sized area OUTSIDE the shed, along one wall, which then can be used to store implements and other (such as racks for fuel or other seasonal items). It is SO MUCH easier on everything if the implements etc are stored on a flat, clean surface compared to storing them on/in soft mud. The stored items stay clean and hook-up/take-off is so much easier.

Wrooster

 

[Rdiel]

There's a right way and a wrong way and a half fast way, Wrooster has the right way down to a science! Nice work!!

 

[Cat_Driver]

Always add fibers to your Mix. I poured 4" or concrete on beach sand with absolutely no compaction of base and it's been 4 years now and not even a hair line crack.

They put it in at the plant and wasn't that much money. I think they have stainless steel fibers and regular fibers. Aome use fibers instead of rebar

http://66.151.101.31/Images/Polypropylene Fibers in Concrete_tcm45-347135.pdf

 

[lovemytoys]

i like the idea of block wall,but where i live we grow rocks . what I'm looking at thanks to all the help here is12x20 slab with 8"x12"perimeter.rebar 24 occ with extra on the perimeter and fiber . if i did what rooster did the frost line is 3 feet down.my machine is to small to do that.

 

[wrooster]

I forgot one other thing...

Run conduit into the shed before pouring the slab. Run as much conduit as you ever think you will need -- conduit is about $4 per 10' length and is a **** of lot easier to put in the ground when the ground isn't covered by cement. Even if you have no plan for power in the shed now, put the conduit it for when you will eventually want/need power. Then it is a simple matter of pulling the wire and hooking up the ends.

Wrooster

 

[Wnc3]

16" on center , it is not much more $'s.

 

[lovemytoys]

what are the major advantages to go 6 " then 4" 4"pad with a 8"x12"perimiter=4.5 yards an 6" pad with a 8"x12" perimeter 6 yard which isn't a big leap in price