Mobile construction for freight transport

Mobile construction for freight transport, comprising a mobile basic element (1), supported by at least two axles, characterized in that this mobile basic element (1) is multi-functional and provided with one or with a combination of two or more of the following means: means (17) by which the basic element (1) can be removably attached under a vehicle chassis (18), a semi-trailer or trailer, whereby at least a connection by the intermediary of a drawbar (8) is realized, which connection determines the position of the basic element (1) in respect to the vehicle chassis (18); means by which the basic element (1) can be brought into such a configuration that it can function as a mobile support point for a center axle-trailer; means (11) by which the theoretical support plane of the basic element (1) can be extended, either towards the front, or towards the rear, or both.