Abstract: The disclosure relates to trailer or semi-trailer body of the wedge type having a horizontal roof and a rearwardly downwardly sloping floor providing a greater height at the rear opening than at the front. The body is of unique construction having the posts and front wall parallel to each other and at right angles to the underframing and lower rail. The roof and rear door frame are disposed at right angles to each other in horizontal and vertical respectively, the arrangement being such as to readily lend itself to mass production of the body.