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8x12 shed slab - concrete ideas

Posted on 8/24/19 at 3:06 pm
Posted by RaginCajunz
Member since Mar 2009
5310 posts
Posted on 8/24/19 at 3:06 pm
I'm strongly considering building an 8x12 shed in the rear reaches of my yard. Nothing crazy, and I have experience building an office for my wife that was far more involved. However, for that we had a concrete contractor come in and it was at the end of our driveway, so the truck was able to back up and pour right into the form.

What's my best bet for pouring the slab? I'd perfer to do the dirt work etc myself. Mostly for cost savings, but I do enjoy doing a lot of the stuff myself.

My initial leanings are either rent the biggest concrete mixer I can and have 80lb bags delivered when I get my materials for framing delivered.

The other thought, can I rent a georgia buggy and have a small load (understanding there are fees involved) poured into the buggy a few times and go dump it across the yard myself?

Posted by LSUtigerME
Walker, LA
Member since Oct 2012
3789 posts
Posted on 8/24/19 at 6:47 pm to
Rent a mixer, get a buddy, and some 80 lb bags.
Posted by Nicky Parrish
Member since Apr 2016
7098 posts
Posted on 8/24/19 at 7:00 pm to
quote:

Rent a mixer, get a buddy, and some 80 lb bags.

4” slab would be 54 80lb bags
This post was edited on 8/24/19 at 7:02 pm
Posted by gsvar2004
Member since Nov 2007
7951 posts
Posted on 8/24/19 at 7:53 pm to
Build it bigger than 8x12.
Posted by LSUEnvy
Hou via Lake Chas
Member since May 2011
12087 posts
Posted on 8/24/19 at 9:11 pm to
quote:

georgia buggy
Posted by CenlaLowell
Alexandria, la
Member since Apr 2016
1011 posts
Posted on 8/25/19 at 3:25 am to
You will wish you would have built it bigger. I have a 12 x 24 and it's still to small
Posted by SlapahoeTribe
Tiger Nation
Member since Jul 2012
12079 posts
Posted on 8/25/19 at 4:01 am to
quote:

4” slab would be 54 80lb bags

That’s a lot of squatting/bending over and awkwardly lifting to pour it into a mixer.

Gonna be a sore SOB the next day.
Posted by RaginCajunz
Member since Mar 2009
5310 posts
Posted on 8/25/19 at 6:45 am to
My biggest concern would be time. Is there a method to retard the cure time giving me more liquid to liquid pour time? If I knew I had a few hours to lift/mix/pour I think we could handle. I’d fear it setting up too fast and having very uneven curing .
Posted by MoarKilometers
Member since Apr 2015
17876 posts
Posted on 8/25/19 at 7:27 am to
quote:

4” slab would be 54 80lb bags


A 4" slab with a non thickened edge... you don't have to go full blown footing here, but if you don't thicken the edge a few inches, you're asking for issues by putting a frame on top of it. 8x12 ain't huge, but neither is 4 inches. Especially when that 4 inches is really 2x4/1x4 tall and really only 3.5 inches. I'd go 1 shovel wide 6-8 inches deep on the edge, 45 degree off the ledge created inside.

Do y'all not have ready made concrete where you can buy up to 1.5 yards and haul it to your location? Comes in a mini mixer? Can even add fiber to it, I believe.
Posted by RaginCajunz
Member since Mar 2009
5310 posts
Posted on 8/25/19 at 8:42 am to
quote:

A 4" slab with a non thickened edge... you don't have to go full blown footing here, but if you don't thicken the edge a few inches, you're asking for issues by putting a frame on top of it. 8x12 ain't huge, but neither is 4 inches. Especially when that 4 inches is really 2x4/1x4 tall and really only 3.5 inches. I'd go 1 shovel wide 6-8 inches deep on the edge, 45 degree off the ledge created inside.

Do y'all not have ready made concrete where you can buy up to 1.5 yards and haul it to your location? Comes in a mini mixer? Can even add fiber to it, I believe.


Agreed. I had planned on doing a pseudo-footing like you described. I may go up in size a bit. It's always a trade-off. I have a decent sized yard for a neighborhood (1/2 acre+) but have two small kids and I like having lots of yard for them.

I currently use my storage (boat port?) off the carport to keep my mower and gardening things in. That also doubles as my workshop. I'm literally tripping on stuff every time I go in there. I'd just like to dedicate the shed to holding mowers, ladders, gardening supplies and long term crap I have stored now, freeing up my workshop.

If I can solve the concrete problem without having to bring in a crew with a georgia buggy, then I'd probably go up in size a bit. 8x12 seemed like the upper limits with a sore back and rented mixer.

I see one of the rental places out here rents the Georgia Buggy. I don't have experience with them, but is it safe to assume I could organize a small load delivery from a redimix plant, and they'd be willing to pour it in batches into the buggy while I made a few passes to dump it?

Posted by LSUEnvy
Hou via Lake Chas
Member since May 2011
12087 posts
Posted on 8/25/19 at 9:13 am to
quote:

but is it safe to assume I could organize a small load delivery from a redimix plant, and they'd be willing to pour it in batches into the buggy while I made a few passes to dump it?


I can’t see why it would be an issue but call around and make sure they can accommodate you.
Posted by Baers Foot
Louisiana Ragin' Cajuns
Member since Dec 2011
3540 posts
Posted on 8/25/19 at 12:36 pm to
Did this at a friend's house the other day. Truck driver stayed and poured into our Georgia buggy about 4-5 loads. They also called and had them put an additive to slow the curing process to give us more time to finish it.
Posted by Nicky Parrish
Member since Apr 2016
7098 posts
Posted on 8/25/19 at 1:03 pm to
quote:

That’s a lot of squatting/bending over and awkwardly lifting to pour it into a mixer.

Someone said the OP should get a buddy to help. Maybe a few buddies.
A 80lb sack of concert doesn’t go very for.
As in a follow up post, would need to be a little thicker along the edge. So that would be even more bags.
Would definitely be a workout.
Posted by Aristo
Colorado
Member since Jan 2007
13292 posts
Posted on 8/25/19 at 1:08 pm to
Triple the size and it will still be too small.

I also vote Georgia buggy. Had to do this with my shop and we had plenty of time. The drive doesn't care because he gets paid either way.
This post was edited on 8/25/19 at 1:12 pm
Posted by Got Heeem
Georgia
Member since Sep 2012
3631 posts
Posted on 8/25/19 at 2:54 pm to
Heed the advice here. 8 x 12 is way too small. You will regret not building it twice to 3x as big. Ask me how I know?
Posted by Tdot_RiverDawg
Member since May 2015
1700 posts
Posted on 8/25/19 at 2:59 pm to
What's the estimated cost to frame it up, pour, and finish?
Posted by Neauxla
New Orleans
Member since Feb 2008
33442 posts
Posted on 8/26/19 at 11:33 am to
mine is 12x18 and I wish it was bigger. I replaced the flat roof a few months ago and wish I had changed it to a pitched roof for the extra storage.

Posted by Iamhome
Baton Rouge
Member since Jul 2019
10 posts
Posted on 8/26/19 at 12:49 pm to
Cajun concrete
Posted by Miketheseventh
Member since Dec 2017
5707 posts
Posted on 8/26/19 at 7:29 pm to
You can rent a Georgia Buggy and just get a truck to come by and then carry it back to where you need the concrete
Posted by AUjim
America
Member since Dec 2012
3662 posts
Posted on 8/27/19 at 10:57 am to
Just curious....why not build a lumber framed floor?

I've always thought when I built mine I'd prefer to have it on a slab, but most folks build seem to build them the other way....what makes you committed to a slab?
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