How much concrete is needed to make a 19x20 slab?
by 
The Curious Bag
ANSWERS: 1
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The amount of concrete needed for a 19-by-20 slab will depend on the inches of thickness. A 4-inch thickness will require 4.69 cubic yards, a 6-inch thickness equals 7.04 cubic yards and an 8-inch thickness would need 9.38 cubic yards.
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