Abstract: An improved prestressed concrete tank having a core wall comprising elongated panels of precast concrete having on their outer faces a sheet of sheet metal presenting parallel, longitudinal, undercut channels is shown. The panels include lateral sheet metal flanges which extend parallel to the elongated sides of the panels and laterally outward therefrom. The flanges have a flange lip on the outermost edge of the flange. The lip extends outwardly from the tank in a direction substantially perpendicular to the panel. The panels are assembled in spaced, side-by side- relationsip such that the flange lips of adjacent panels are spaced from one another. A sheet metal splice member having a channel shape is interposed in the space between the flange lips of the adjacent panels. The splice member has upstanding sides which abut the lips of the adjacent flanges. The upstanding side and the flange lip adjacent to it are seamed together in a tight fold, thus locking the adjacent panels together.

Abstract: A prestressed concrete tank having a core wall comprising elongated panels of precast concrete having on their outer face a sheet of sheet metal presenting parallel, longitudinal, undercut channels, is shown. The precast panels are assembled and spaced, in side-by-side relationship. Two, laterally extending metal flanges which run parallel with the elongated sides of the panels are provided. The flanges on adjacent panels overlap one another and are fastened by means of sheet metal screws. The joint formed is sealed with an elastomeric material. The advantages of the tank configuration are that expensive cover plates as have heretofore been used are avoided and the joinery is reduced by approximately one half thereby reducing the cost of sealant material and the labor required to apply it, as well as substantially reducing the likelihood of leakage from the tank.