I have a 40x80 pole barn that I would like to have completely poured. It is presently dirt except for the 20x25 pad that I had poured by a friend of a friend, cheap and not the quality that it should be but there are no problems with it yet and a dream to work on so I want to do the rest and would like to do it as close to correct as possible. We have no codes, be as stupid as you want but don't whine when it fails. I plan on installing a four post lift [ bendpack will probably be my choice] read your post on concrete and height and believe a 4 post will work better for my purposes. I don't see how a footing would work with an existing pole barn though as the first pour was just a slab. Your insight on this would be greatly appreciated.