Abstract: A method and apparatus for constructing an above ground concrete encased storage tank. The apparatus has a support assembly that extends from the baseplate of a concrete form, that supports, elevates, and secures an inner storage tank from the form baseplate, so that the tank may be completely surrounded by concrete. The form has removable walls that may be pivotally attached to the baseplate and initially in a horizontal position. The support assembly has anchor bolts that extend through holes in the baseplate. The anchor bolts are screwed into anchor nuts that are attached to a pair of brackets. The anchor nuts and brackets are spaced from the baseplate by sleeves that fit over the threaded portions of the anchor bolts. The brackets are constructed to support the storage tank, which is placed in the form on top of the support assembly. The tank is then fastened to the support assembly.

Abstract: Large storage tank structures having relatively smooth internal surfaces free of any unwelded seams and gaps and particularly free of gaps between meeting parts which may change substantially with differential expansion and other forces thereon are disclosed. This allows the application of suitable corrosion-resisting coating materials to the internal surfaces of the tank which coating will maintain its integrity throughout the expected useful life of the coating and which will be conducive to meaningful inspection and local and/or entire recoating to prolong the life of the tank.