When a building is to be lifted, a continuous steel foundation around the perimeter of the structure is essential. This can be an angle or U-channel for small units or I-beams for larger structures. Buildings can be lifted using the correct sling arrangement and lifting beam. Normally, 4 modules can be lifted using a 6 legged sling without the need for a lifting beam.
Rubb buildings can be fitted with wheels using a continuous steel foundation. The larger structures are fitted with wheels and run on rails. Smaller shelters can be fitted with rubber tired wheels.