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Old 04-09-2009, 03:25 PM   #16
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Making a footing for slab that already exist?


Wildie, this is exactly my problem but I do not understand how you did it.

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Old 04-09-2009, 05:06 PM   #17
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Making a footing for slab that already exist?


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Originally Posted by Arvind View Post
Wildie, this is exactly my problem but I do not understand how you did it.
I dug down to the 4' level using a shovel and clam style post hole digger!
Under-mining the existing foundation in such a manner that the pocket for the 16" square footing was centered under the foundation.
I then filled this pocket was cement to a depth of 6" and let it setup!
Then I cut a Sono tube down the middle,lengthwise leaving enough of the tube to slip under the corner of the foundation.
Then I back-filled the hole to keep the tube in place.
Then made a sloppy mix and filled the tube up, tamping all the while, making sure that it flowed under the the old foundation.
I pushed some 3/8" re-bar down into the mix to reinforce the pier.

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