But rather than sliding pre-built sections of bridge in from the side as is now done on many highways, this 300-foot-long machine drops sections in a straight line.
The machine uses arms that grip the beams set to support the bridge and from there, it’s a balancing act. The SLJ900 moves forward with a huge bridge section in tow and places each one before moving on to next bridge beam.
The 580-ton machine, according to the YouTube description, was designed by the Shijiazhuang Railway Design Institute of National Defense University. In the video, it’s working on a bridge from Chongqing to Wanzhou in China.
Check out the videos of the SLJ900 at work:
