
10/25/07, 09:54 PM
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Join Date: Oct 2006
Location: Northern Michigan (U.P.)
Posts: 9,384
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In areas that the ground freezes fairly deep, improperly poured concrete will help the soil push the posts out. If you pour concrete around the post and the top of the concrete flares out like a mushroom or an upside down tree trunk, the freeze/thaw cycle can get under the concrete and push the post out of the ground. A chunk of sheet metal formed into a cylinder and set down into the hole a bit makes a nice concrete form.
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