o/t how much concrete do i need?

730 virgil · Sep 2, 2010

i know someone on this site will know the answer to this.
i want to build a shed to house machinery and hay it is 35 ft wide 54 ft long. the footing is 18 in. wide x 16 in deep. 10 in x 3 in channel done the middle of footing.
how yards of concrete will i need?

Jeff in TX · Sep 2, 2010

36 yards for a 4 inch thick slab. I figured it myself, but here is a handy calculator.
Poke here

Owen Aaland · Sep 2, 2010

(quoted from post at 23:33:02 09/02/10) i know someone on this site will know the answer to this.
i want to build a shed to house machinery and hay it is 35 ft wide 54 ft long. the footing is 18 in. wide x 16 in deep. 10 in x 3 in channel done the middle of footing.
how yards of concrete will i need?

If you are asking how much for the footings I came up with just under 12 yards.

MarkB_MI · Sep 3, 2010

Gotta convert everything to the same units:
3 inches = .25 ft
10 inches = .83 ft
16 inches = 1.33 ft
18 inches = 1.5 ft

OK, you have the following:

2 side footings:
2 x ((1.5 x 1.33 x 54) - (.83 x .25 x 54)) = 2 x (108 - 11) = 2 x 97 = 194 cubic feet

2 end footings:
Subtract the thickness of the sides from the length of the ends, so 35 - 3 = 32 feet.
2 x ((1.5 x 1.33 x 32) - (.83 x .25 x 32)) = 2 x (64 - 7) = 2 x 57 = 114 cubic feet

Total:
194 + 114 = 308 cubic feet
308 / 27 = 11.4 cubic yards

12 yards should do it.

WalJohn · Sep 3, 2010

Probably about 1/2 yard more than you order. LOL

Anonymous-0 · Sep 3, 2010

exactly 38 yards assuming the pad is 4" thick, I'd order 40 yards to make sure you have enough. If you depths are right on you'll be fine , but if your off a couple inches here and there you will need more than 2 yards extra. Hope this helps Mike

ohiojim · Sep 3, 2010

where you at that you only need footers 16" deep,..?

El Toro · Sep 3, 2010

I came up with 38 cu-yds too. Give these dimensions to your concrete supplier and he will tell you how much to order. You don't want to be short. Hal

massey 333 · Sep 3, 2010

Just for the footer,13.19 or like someone else said 12.give or take on how accurate your footer is.or 35 more for a 6"floor(48Y.) or 23.4 for a 4"floor(37Y)

730 virgil · Sep 3, 2010

thanks guys plan is to do the building this year half of the floor next year. that way i can afford this project

o/t how much concrete do i need?

730 virgil

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Jeff in TX

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Owen Aaland

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MarkB_MI

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WalJohn

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Anonymous-0

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ohiojim

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El Toro

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massey 333

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730 virgil

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