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Enlarging an existing slab

Posted by Ron Ballenger on December 29th, 2002 10:05 AM
In reply to Pouring Cement Slabs In Small Sections by Vince Blackerby on July 10th, 2002 12:51 AM [Go to top of thread]

1 of 1 people found this post helpful

What do I do to enlarge an existing patio/porch slab by 12 inches? Someone suggested drilling into the side of the existing slab and inserting rebar. Someone else said just wire in the bottom would be fine. The additional 12 inches will be the support for the brick pony wall and roof supports, so I need it to be strong. Also, how deep should I make the additional 12 inches. The existing slab is 4 1/2 inches thick. I'd appreciate any help. Thank you.

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