Chassis structure with integrated tank device

The structure (1) has a longitudinal support structure (10) and another longitudinal support structure (20) spaced apart from each other in a transverse direction (QR) of the frame bearing structure. A fuel tank (T) receives fuel for the operation of a tractor, and an air tank (T') receives air. The fuel tank is designed as a load-bearing part of the longitudinal support structures of the frame bearing structure, where the fuel tank serves to bear a powertrain unit for the tractor.