Construction commences on world's "tallest 3D-printed structure" Tor Alva

Architects Michael Hansmeyer and Benjamin Dillenburger are creating a 30-metre-tall tower in the Swiss Alps, which is being 3D-printed with concrete by technology university ETH Zurich.
Named Tor Alva, or White Tower, the building will become the world's "tallest 3D-printed structure" once complete in Mulegns later this year, according to Hansmeyer and Dillenburger.
ETH Zurich has commenced the 3D printing process and so far created eight out of 32 structural columns.
Tor Alva will be 30 metres