Various examples of arrangements and methods are provided for loading and unloading first and second load units carried by a vehicle. A landing device is arranged between a first end of the first load unit and a second end of the second load unit so that a first portion of the landing device is supported to the first end of the first load unit and a second portion of the landing device is supported to the second end of the second load unit. The landing device can move the first end of the first load unit into a lower level than the second end of the second load unit after the first end of the first load unit is moved so that it passes the second end of the second load unit.