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Anxious-Captain737 t1_j9q5p75 wrote

they will heave at three feet and need to driven back down every coupe years depends also what your soil is like if you are on well drained light sandy soil 18 inches will work heavy wet clay even at 4 feet they will heave

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steel_wool_sweater t1_j9tym82 wrote

This is correct.

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Anxious-Captain737 t1_j9u1j5l wrote

well thank you i am just a old farmer speaking from past experience was all

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steel_wool_sweater t1_j9uf9u5 wrote

I am not sure about fences, but I had an old deck that i tore out that had poured footings going down about 3 feet. In heavy clay, you can imagine how badly everything heaved!

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