A bridge erecting machine is a device that places prefabricated beams onto prefabricated bridge piers. The bridge erecting machine belongs to the category of cranes because its main function is to lift the beam pieces, transport them to the position, and then put them down.
Bridge erecting machines are very different from general cranes. Its requirements are harsh and there is a movement on the beam, also known as longitudinal movement. Bridge erecting machines are divided into several types, including highway bridges, conventional railway bridges, and passenger railway bridges.