steel fence posts in old concrete?


Old 04-04-04, 08:32 PM
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steel fence posts in old concrete?

I need to replace about 60 ft of 6 ft wood fence. The old wood posts are rotten and I want to use steel posts instead.

My question is about something I saw my neighbor do to keep from having to get rid of the old concrete and pour all new concrete:

In the old concrete still in the ground, chip out the underground part of the old rotten wood post to make a 4x4 hollow hole. Pour new concrete in the 4x4 hole and then put a new steel post in.

I am all for saving time, but will this compromise the strength of the posts in any way, as compared to pouring brand new concrete in an 8 inch or so round hole?

And how deep should the steel post go?

Thanks for any help!
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Old 04-05-04, 09:01 PM
Join Date: Mar 2000
Location: Arlington, WA
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Sounds like an awful lot of work, and who knows what you end up with. If the concrete of the old posts is at or below grade, I would simply move over a foot and put in a new hole for the metal posts. Leave the old concrete where it is -- it won't hurt a thing.

Put the metal posts AT LEAST 18" deep, but 24" would be better. And install caps on the metal posts -- keeps the water out of them.
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