Why Would Engineers 3D-Print an Entire Steel Bridge?😱

What if you could literally 3D print an entire steel bridge? Instead of printing plastic, WAAM uses an electric arc to melt metal wire and deposit it layer-by-layer. And here's where it gets wild. A robotic arm can keep laying down metal along a programmed path, gradually turning a thin wire into a massive structure. Engineers have already used

this technology to create real [music] steel bridges, but the bigger advantage isn't just making bridges. WAAM can create complex shapes that would be difficult or wasteful to manufacture using traditional methods.