Aquaculture Tanks - Rim Frame

Here are a few images of the model for the aquaculture tank frames (3) I propose.  The purpose of this frame is to reinforce the top edge of the tank, hold the liner in place, and to provide a platform for setting plant flats, small potted plants on.  The colors shown indicate:
Yellow: top frame to hold tank shape, removable when water level is at or below floor level;
Red:  Rim reinforcement metal band, holds liner in place and reinforces sheet metal tank edge, removable when water level is at bottom of tank liner, for liner removal;
Blue: Steel angles connecting sheet metal tank sides together, also bolted to greenhouse wall girt and foundation wall, as the permanent tank anchor;

The frame assemblies are made of:
Yellow top frame: 1 1/2"x1 1/2" x/14" steel angles, welded to 12" dia. x 3/8" thick half-circle plate, and an angle seat and the end of each radial arm (4), and finally a semi-circle platform of 1x1 wire mesh;
Red rim frame: 4" x 1/8" steel band, with 1/4" steel clips w/ 3/8" space behind, to wrap entire tank perimeter;
Blue angle corners: 4" x 4" x 1/4" steel angle with 14-guage tank wall bolted to it w/ 1/4" round-head bolts at 4" o.c., and angle bolted to foundation wall and wall girt with 1/2" bolts.  Top of angle corner would be covered with a slip-plate to hold the rim frame in place.