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Watch how a bridge is constructed using the SLJ900 mega machine

How do you build a bridge without the help of a bridge? The easiest way? This SLJ900 machine.


Have you ever thought to yourself how bridges are built? I have, but I personally don’t have the brain capacity to even know where to start.

Luckily for people like me, there’s always YouTube.

This video of a SLJ900 machine shows exactly how some bridges are being constructed around the world. “It moves in coordinated parts to deftly erect a bridge or viaduct, balancing its weight on the beams before laying out the groundwork. It’s really cool to see it slide across and pop out,” reports Gizmodo.

Here’s a detailed animation showing exactly how the SLJ900 works its magic:

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Kevin is KnowTechie's founder and executive editor. With over 15 years of blogging experience in the tech industry, Kevin has transformed what was once a passion project into a full-blown tech news publication. Shoot him an email at or find him on Mastodon or Post.

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