Image Number 7 for United States Patent #6394534.
A commercial truck body is described, with particular reference to a fire truck body. The truck body if formulated of a co-polymer material with certain strategic corners of the co-polymer material being formed by a single sheet of copolymer bent into the predetermined angle and extrusion welded on the interior portion of the corner. Other junctions of the copolymer material are formulated using traditional fusion, butt, and other joint techniques. In the fire truck application, the liquid storage tank can be integral with the copolymer truck body such that the copolymer truck body formulates both the exterior of the truck body and the liquid storage tank itself. The liquid storage tank can alternatively be a separately formulated copolymer tank also formed with bent corners and interior extrusion welds.