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Wood foundation for metal backyard shed

Posted on 4/6/21 at 9:19 am
Posted by jyoung1
Lafayette
Member since May 2010
2138 posts
Posted on 4/6/21 at 9:19 am
I'm getting a 10' x 12' shed, wondering what is most cost effective way to make foundation?

The ground is fairly level.

Would something like this be good?
Posted by jmon
Loisiana
Member since Oct 2010
9232 posts
Posted on 4/6/21 at 9:29 am to
Yes. Pressure treated, of course.
Posted by CHEDBALLZ
South Central LA
Member since Dec 2009
22723 posts
Posted on 4/6/21 at 9:29 am to
You getting a pre fabbed shed? Is so those block will work. That's what my shed is on.
Posted by wickowick
Head of Island
Member since Dec 2006
46122 posts
Posted on 4/6/21 at 9:30 am to
Does the shed that you are purchasing have a floor?
Posted by jyoung1
Lafayette
Member since May 2010
2138 posts
Posted on 4/6/21 at 9:43 am to
quote:

Does the shed that you are purchasing have a floor?


No, the foundation would also be the floor.
Posted by jyoung1
Lafayette
Member since May 2010
2138 posts
Posted on 4/6/21 at 9:45 am to
So 2x6's or 2x8's on outside joists?

How many middle joists do I need?

Can some be 2x4's?
Posted by CHEDBALLZ
South Central LA
Member since Dec 2009
22723 posts
Posted on 4/6/21 at 9:54 am to
I would do my outside runners at 2x8s and the inside at 2x6s 16" OC. Use 3/4" Pressure Treated Tounge And Groove Plywood for the floor. That will get you by for a long time. If you parking a riding mower in it I would I would do everything 2×8.

Price of wood now days it will probably be cheaper to pour a slab. It would be $400-500 in concrete for a slab.
Posted by lsutiger2010
Member since Aug 2008
14790 posts
Posted on 4/6/21 at 10:11 am to
(no message)
This post was edited on 10/17/21 at 8:51 pm
Posted by gumbo2176
Member since May 2018
17845 posts
Posted on 4/6/21 at 10:18 am to
quote:

You are only looking at roughly 1.5 cubic yards of concrete for a 4in thick slab. I'd probably go that route if I were you.



That kind of depends on the minimum order some companies will take to deliver.

May be easier to get bags and a mixer to do the job himself.


ETA: I looked it up on a calculator for slabs and it would take 67 bags of concrete mix in 80 lb. bags to do 120 sq. ft. of slab 4 inches thick.

A lot of cement companies have a 3 cu. yd. minimum for delivery too. However, it may vary so best to call around.
This post was edited on 4/6/21 at 10:26 am
Posted by jyoung1
Lafayette
Member since May 2010
2138 posts
Posted on 4/6/21 at 11:25 am to
I'd rather not got the slab route, as this is only a house We'll be living in for next 5-7 years.

Not parking riding mower.

Ok I think I'll go 2x8's with 2x6's 16" OC with the 3/4" Tongue and Groove like you said. I was thinking I could do 24" OC, but might as well just get a few more boards and go 16".



Also, the manual for shed says not to have bottom of shed in contact with PT wood as it would speed up corrosion. I'm not sure what to do about this?


This post was edited on 4/6/21 at 11:37 am
Posted by lsutiger2010
Member since Aug 2008
14790 posts
Posted on 4/6/21 at 11:34 am to
(no message)
This post was edited on 10/17/21 at 8:51 pm
Posted by lsutiger2010
Member since Aug 2008
14790 posts
Posted on 4/6/21 at 11:35 am to
(no message)
This post was edited on 10/17/21 at 8:51 pm
Posted by jyoung1
Lafayette
Member since May 2010
2138 posts
Posted on 4/6/21 at 11:38 am to
quote:

The point is that building a PT lumber base like you are talking about is going to cost just as much as pouring a small slab nowadays


Understood, thanks.
Posted by gumbo2176
Member since May 2018
17845 posts
Posted on 4/6/21 at 11:52 am to
quote:

The point is that building a PT lumber base like you are talking about is going to cost just as much as pouring a small slab nowadays.




Yep, and given the choice between a slab or a wood framed base, I'd go slab all day long. Nothing ever has to be replaced. The building will long rot and the slab will still be there awaiting a new one.
Posted by CHEDBALLZ
South Central LA
Member since Dec 2009
22723 posts
Posted on 4/6/21 at 12:52 pm to
I was only supposed to be in my house 4 or 5 years. I'm going on year 17. Just pour a slab. You'll be happy you did.

As far as a PT wood not hitting the shed that's the first I hear of something like that.
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