Chassis structure with a tank arrangement

The frame support structure (1) has a longitudinally extending support structure (10) and another longitudinally extending support structure (20), where the structures are spaced apart from each other in a transverse direction (QR) of the frame bearing structure. A tank unit for receiving fluid, particularly a fuel tank unit for receiving a fuel, is provided for operating a motor unit or an air tank unit for receiving air. The tank unit is arranged partially between former support structure and latter support structure.