Lego bridge girder machine - GIF

[Frank S]

Those bridge girder machines are some cool works of are and real feats of engineering.
I designed and built a post tension form for bridge girders that were to be cast on sight for a highway being built in Afghanistan
Not anywhere near the size of the girders being placed in the video My girder form was for single girders at 37 meters long
Here is a couple of photos of the drawings and 1 actual photo of the form