Patent ID: 7950722

Claim:
A wall structure for a bulk commodity carrying truck body or trailer, said wall structure comprising: a plurality extruded aluminum panels each arranged vertically to define a wall structure, wherein each of said plurality of panels comprises a flat inner wall, a flat outer wall spaced-apart from said flat inner wall, and first and second end walls that extend parallel to each other and perpendicular to said flat inner and outer walls and that interconnect said inner and outer walls, said panels arranged in a series with their respective first and second end walls abutted with each other to define respective vertically extending seams, wherein each said vertically extending seam is welded to attach the abutted panels to each other; one of said first and second end walls of each panel comprising a projecting flange and the other of said first and second end walls of each panel comprising a groove, wherein the flange and groove of abutted panels of said wall structure are mated and wherein the flange and groove are offset relative to a midpoint between said inner and outer walls.