A company called Icon is 3D printing houses. Yes, big printers using a proprietary product called Lavacrete. Excellent strength, insulation, and fire resistance with most of the internal components either printed in place or gaps for putting in housings for electrical and plumbing.
This example, they are printing 100 houses.
They are not entirely LavaCrete. They use wood for trusses to hold the roof in place, but the trusses are mounted to huge threaded rods that are in the foundation.
When I was young (6th grade?) I was obsessed with the idea of building houses with sintered metal as a way and low labor way to build structures. Wow!
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