Abstract: A trailer has a rear floor assembly having a threshold plate and at least a pair of supports extending downwardly from the threshold plate, a rear lower cross member secured to the rear floor assembly, and a rear impact guard assembly having at least a pair of supports and a horizontal member secured to lower ends of the supports, upper ends of respective ones of the supports of the guard assembly secured to lower ends of respective ones of the supports of the rear floor assembly.

Abstract: A trailer comprises a pair of opposed side walls, a floor, and a roof. A pair of opposed lower side rails extend generally parallel to a longitudinal axis of the trailer and having aft ends. The floor has an aft end edge forward of the aft ends of the lower side rails. A plurality of transverse frame members span between the lower side rails and underlie and support the floor. A crash plate assembly is secured to the lower side rails and transverse frame members and has a threshold plate, a pair of inboard supports, and a pair of outboard supports, the threshold plate extending from the aft end edge of the floor to the aft ends of the lower side rails. A rear frame assembly is secured to the crash plate assembly, side walls, and roof, the rear frame assembly having a pair of opposed vertical side members, a lower cross member, and an upper cross member.