Backup Bridge

Part

A bridge structure between the rear of the main beam and the first backup deck. It carries the conveyor transfer and, on some machines, the shotcrete robot, and leaves the tunnel floor beneath it clear for laying track, invert segments or a roadbed.

Class	Part

A bridge structure between the rear of the main beam and the first backup deck. It carries the conveyor transfer and, on some machines, the shotcrete robot, and leaves the tunnel floor beneath it clear for laying track, invert segments or a roadbed. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.