Posted 6/1/2012 08:22 (#2408799 - in reply to #2408250) Subject: Re: What to put under bin footers
Faunsdale, AL
If in not well drained land, I would install a drain tile at the bottom of the trench. If there's no water in the gravel, it can't heave.
Of course we don't have to worry about frost here. We do deal with very expansive soils. Worst thing for a foundation the last few years has been the summer droughts.