The R/S ATHD Series Aluminum Trailer is built for heavy-duty performance with it's high sides, continuous welded construction and sturdy understructure. The understructure features 5-in. I-Beam Longitudinals and 4-in. Boxed Extrusion Crossmembers. The floor, sides, bulkhead and tailgate are constructed of 5454 Aluminum (.250 Floors; .180 Sides, Bulkhead & Tailgate). The bulkhead is a one-piece wrap-around design. The tailgate is fully welded and has Air Operated hardware. Other features include PAGE TSP Saddle Mount Single Point Suspension, front mount telescopic hoist, 25,000-lb. capacity axles and steel disc wheels, 14 ply tubeless radial tires and a pre-mounted tire carrier.