A hybrid dump body comprises a main frame that includes a cross memberless frame structure of two spaced apart elongated members. Secured to the cross memberless frame is a steel bottom having a substantial flat portion and a pair of curved upturned side or edge portions. Secured to each curved edge portion of the steel bottom is an aluminum side wall or panel. Connected across the front of the hybrid dump body is a bulkhead that extends between the aluminum side panels and the steel bottom. Disposed about the rear of the dump body is a tailgate.