re: Setting a 4x4 fence post in concrete on top of 2" schedule 40 pvc pipe

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approximately 2' below ground

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They are never as deep as they should be.

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Post this on the home and garden board for some expert opinions

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Reading this on the H&G board (after thread moved) cracked me up.

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My concern is how much dirt do I need to have between pipes and bottom of concrete. I don't want to break the pipes.

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In practical terms, you really don't need much. A fence post (especially with concrete) isn't really putting that much axial load even in wind. PVC pipe is actually very strong, especially underground. Like mentioned above, you can spread the load with crushed stone and a small footing ~6"+ over the pipe.

However, I'd really relocate pipe or post.

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Due to the direction of the pipes and the specific location, I cannot very easily put the post in another spot. I would have to dig up every other post I already set.

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I challenge these statements. There is always a way to get creative with a fence.

I feel like we need a MSPaint sketch of the situation to move forward.