Once a fixed pantograph gondola has descended along the protruding part of the facade, the horizontal jib of the of the roof car is raised. This makes that the gondola moves closer to the facade underneath the protruding element, while the counterweight keeps the gondola in perfect balance.
The fixed pantograph gondola can be delivered in different sizes and dimensions. Nevertheless, the horizontal movement of a fixed pantograph is limited (about 4 meters max.).
With pantograph gondolas that are able to extend once they are descended under an obstacle, a wider horizontal range can be achieved – without the need for a big and heavy roof car with a huge jib.