Abstract: A spatial frame structure of a vehicle designed for connecting structural assemblies. The described frame construction allows the use of interchangeable high-capacity fuel tanks. As a result, most structural assemblies are mounted to the outside of the frame, thus creating additional space in which elements of alternative fuel and energy source systems (e.g. natural gas tanks, electric batteries) can be assembled. This makes it possible to increase the working time of the agricultural vehicle. The frame construction comprises rigidly interconnected longitudinal tubular beams, transverse, perpendicular and diagonally arranged structural pipes, additionally connecting stiffness elements.