[jstanley]

I recommend the video, it includes some footage of the printing process: https://www.youtube.com/watch?v=STAHy6hTP14

Unlike traditional 3d metal printing, which works by laying down a powder which is then baked in an oven to fully sinter it, this bridge seems to be constructed by directly welding additional metal to the existing structure.

Here's a fun DIY attempt at the same kind of idea: https://www.youtube.com/watch?v=sFXniBbgbw0 (and, if you're into home machining, almost all of the other videos on his channel are very enjoyable too).

[joshu]

I knew this was gonna be Tony before I even clicked.