The world’s biggest 3D printed building (at 6,900 square feet) was recently completed in Dubai

3D printed houses, at around 500 square feet, are small enough to be constructed by a printer that moves around on a track. But there’s not yet a printer in existence that can build a 6,900-square-foot structure in one go; the printer used on this project was moved around by a crane to complete the various segments of the building, pumping out successive layers of a gypsum-based mixture.

The building has a traditional foundation made of pre-cast concrete, and it’s reinforced with concrete and rebar. Once the walls were all printed (the company didn’t specify how long the printing process took), contractors added the roof and windows.

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