Bridge erecting machine is a device that places prefabricated beams onto prefabricated bridge piers. Bridge erecting machines belong to the category of cranes, as their main function is to lift beams, transport them to their designated positions, and then lower them down. But its requirements are strict, and there is movement or longitudinal displacement on the beam. Bridge erecting machines are divided into several types, such as highway bridges, conventional railway bridges, and passenger dedicated railway bridges.