Would You Do it?
….. Build a 12’x16′ shed on a
a “floating” slab.
Form a box (12’x16′)out of 2×4’s on top of the ground
square, level and brace. Dig out inside this
box to thicken the edge to 8″ to 10″ deep appox. the width
of a shovel. Add some wire mesh and maybe some visquene
and call it good. Oh and this is the memphis area so frost
level is about 13″.
Heck ya ........to park my lawnmower, not to live in
What I would do is either perimeter tile or slope the grade away from the building on all sides
(on the soil)
Butch: Thats how I built this 18 ft. x 24 ft. shed. I built another one that was 12 ft. x 16 ft 30 years ago and its still doing fine. I did run 3/8 rebar every two feet both ways.....and did dig down the perimeter to 1 ft.
Of course the best way is a full foundation....but for just some lawn mowers....and christmas decorations...it will be fine.
You built that 30 years ago, and you still only have half of it tarpapered ???;o)
thanks for the replies,
anybody venture a guess at how much concrete
I would need?
Is 3000 psi sufficent?
3000 psi is ok, but spend just a few more dollars for 3500 or 4000.
A simple slab 12'x16'x full 4" = 2.4 cy.
If the footer is another 6" deep x 12" wide x 56 ft long = 1.0+ cy.
Order 4 yards and have a sidewalk or something formed up.
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Edited 10/12/2005 10:25 pm ET by FastEddie
Also find out what the minimum order is. If you need 4 yds and the min. is 5, you're going to pay for a yard you don't get. It only gets worse when the minimums go up. I have one supplier with a minimum of 6 and one with 8.
I generate a little more good will or attaboys when the customer gets a larger patio, driveway or walkway than expected, even though I have to charge for the concrete.
We have a company here that has small concretetrucks and the MOST they can carry is 3 1/4 yards.So they fill the bill for this paticulare jobTwo deliveries- 2yds then 1 1/2yds 3500psi large rockjust shy of 400.00. And they deliver sat. no extra charge.
We do light buildings once in a while on a "haunch" pour such as what you describe. Only thing that would concern me is that @ 3-1/2 " above grade, you're pretty close in regards to bugs and more importantly, splashing rain. Think I'd do as you describe w/the trench inside but I'd form up outside w/ a 2x10, and fill inside w/ appropriate gravel to keep the pour at 5" thick or so.That way, your conc expense doesn't go up, but you can keep the wood around 9" above grade.
I appreciate the heads upBut I plan to wrap the structure in tar paperand use hardie siding so hopefully moisture shouldn't be a problemo.
Why concrete? You could build it on a pressure treated platform
Why concrete?That is what the customer wants.