Just as the title states, I am interested in leveling a fixture table that I made in my pole barn. I'm not sure how thick the concrete is or how well it was poured therefore I need to account for the possibility of the floor shifting throughout the seasons. Have any of you ever heard of a type of leveling foot that self adjusts to the floor to maintain level/equal force on each foot? Its not so much the table being on a slight angle that I'm concerned of as it is unequal reaction forces at the feet of my table causing the structure to flex under load.

Thank you,