A complete, step-by-step procedure of construction including DOT-approved lighting/wiring schematic and bill of materials. Features welding procedures along with tips and tricks. Copyrighted, engineer-approved drawings are 120 scale on 24in. x 36in. sheets. U.S.A. Note This item can NOT be returned. Blueprint Description Utility, Trailer Capacity lbs. 3,500, Trailer Size ft. 10 x 6, DOT Approved Yes, Blueprint Scale 120, Single or Double Axle Single.