Method for adjusting the wheelbase of a wheel-mounted assembly comprising at least two handling devices for containers

The device (4) has a chassis (6) mounted on wheels. Coupling units are coupled with an end surface of a container e.g. shelter, to constitute a road trailer when another end surface of the container is associated with another handling-trucking device. Temporary assembling units i.e. upper hooks (21), assemble the former device with the latter device for constituting a container less rolling assembly. The assembling units form a part of a parallelepiped connection structure (20) between the devices.