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The Question:

How much concrete in cubic yards will I need to form a retaining wall that is 12 feet long, 24 inches high, and 12 inches wide? Thanks for your help.

Your Answer:
You will need approximately 1.8 cubic yards of concrete.
You will need approximately 1.6 cubic yards of concrete.
You will need approximately .89 cubic yards of concrete.
You will need approximately 2.2 cubic yards of concrete.

By: paul w

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I need to install a pier Foundation under existing concrete slab.
I was told that I can install some 36 inch piers under my existing concrete slab porch in order to enclose the porch inside my home. Can I do this by pouring the concrete on the side on the slab or do I have to take some of the slab up, install re-bar , etc. Any masonry tips would help.
If I excavate under the slap, should I use a sonatube, and how do I pack it so the bottom of the slab touches the pier?

By: anthony

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