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# Concrete Quantity Formulas?

## Concrete Quantity Formulas?

#1
10-10-04, 11:30 AM
countryboy1757
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Posts: n/a
Concrete Quantity Formulas?

I'm currently forming up, and getting ready to pour a slab for a new garage/shop and driveway. But what I need and have forgoten in my old, forgetfull mind are the formulas I need to figure how much concrete I'll be needing. I think the slab formula is, depth x .0833, x length x width divided by 27. What I'm missing is the formula for figuring beams. Help if ya'll can.

#2
10-10-04, 11:49 AM
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Join Date: Nov 2001
Location: Taylors, SC
Posts: 9,261
length x width x depth in feet divided by 27 gives cubic yards.

#3
10-10-04, 12:01 PM
countryboy1757
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Originally Posted by chfite
length x width x depth in feet divided by 27 gives cubic yards.
Yes and thats what I'll need when I order concrete, cubic yards, but I need a beam formula so I can add that to the total concrete order. I'm on the gulf coast of Texas, down here we pour slabs with beams around the edges and through the slab for any weight bearing walls. Thanx

#4
10-10-04, 12:09 PM
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Join Date: Jul 2003
Location: Eastern USA
Posts: 948
beam = footer? If so, thats easy. If the pad is going to be 6" thick 30' wide and 50' long.. You figure out the yardage for that. If the beam aka footers aka whatever are 2' wide, 160' total lenth x 6" deeper then the pad and figure out that yardage. Add then together and you have a miracle.. remember to add a bit of extra concrete just in case. Its a lot better to have to much then not enough.

#5
10-10-04, 05:31 PM
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Join Date: Jul 2004
Posts: 123