Generally storage containers of this type are formed from a cylindrical wall of corrugated steel which is bolted to a horizontal concrete footing or base. A coating can be applied on the inside surface of the wall and on the concrete base to provide a waterproof layer to prevent escape of the liquid. In alternative arrangements, a liner is applied in the inside of the wall and over the concrete base. It has also been proposed that the footing comprise simply a concrete ring.
However these constructions are relatively expensive particularly in the large size which is necessary for large scale liquid storage suitable for hog plants and the like.
USPTO Backgrounds
USPTO Backgrounds