Patent ID: 6929311

Claim:
A trailer comprising: a plurality of vertically extending monolithic hollow extruded wall panels positioned adjacent one another, each wall panel comprising an inside wall and an outside wall connected to each other by a first end wall and a second end wall, the outside walls of the plurality of wall panels forming a smooth exterior trailer wall surface; a floor; a monolithic horizontally extending top rail, the upper end of the wall panels being secured to the top rail, the top rail comprising: a first wall panel engaging flange engaging the outside wall of each wall panel; and a second wall panel engaging flange engaging the inside wall of each wall panel; and a horizontally extending bottom rail, wherein the lower end of each wall panel and the floor are both secured to the bottom rail, wherein said horizontally extending bottom rail comprises a monolithic bottom rail comprising: a first U-shaped section oriented vertically upward, the lower end of each wall panel being positioned within the first U-shaped section; a second U-shaped section oriented horizontally, the floor being positioned within the second U-shaped section, and wherein said bottom rail further comprises a bottom rail angle section extending from the second U-shaped section toward the wall panels positioned within the first U-shaped section, wherein a free end of the bottom rail angle section engages the inside wall of each wall panel.