# Then I figured out how many bags of premix you'd need... heh heh.

Posted by Jim -ATS on May 5th, 2000 10:29 AM
In reply to rectangular hole in some concrete slab by Gregg N on May 4th, 2000 09:44 PM [Go to top of thread]

An 80# bag of premix concrete yields 2/3 cubic foot of concrete.

Your "hole", once you tamp it and add an inch of gravel is 12' x 5' x 4" (1/3 foot)

12/3=4

4 x 5 = 20

You need 22 cubic feet of concrete.

If 80# of premix yields 2/3 cubic foot, then it takes 3 80# bags to yield 2 cubic feet.

You would need 33 80# bags of premix in your basement.

33x80=2640 lbs, or two trips to home depot in your half ton pickup. (by the way, they usually have a rental truck, or you can have it delivered. Call at least a week in advance of your project)

Did I mention you get to carry 33 80# bags?

You could also get 44 60# bags, for the same volume, but less weight per bag. You have to make more trips down those stairs, though.

I'm getting excited thinking about all this, are you?

Have fun!

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