The University of Southern California is testing a giant 3D printer that could be used to build a whole house in under 24 hours.

Professor Behrokh Khoshnevis has designed the giant robot that replaces construction workers with a nozzle on a gantry, this squirts out concrete and can quickly build a home according to a computer pattern. It is “basically scaling up 3D printing to the scale of building,” says Khoshnevis. The technology, known as Contour Crafting, could revolutionise the construction industry.

The affordable home?

Contour Crafting could slash the cost of home-owning, making it possible for millions of displaced people to get on the property ladder. It could even be used in disaster relief areas to build emergency and replacement housing.  For example, after an event such as Typhoon Haiyan in the Philippines, which has displaced almost 600,000 people, Contour Crafting could be used to build replacement homes quickly.

As Khoshnevis points out, if you look around you pretty much everything is made automatically these days –

your shoes, your clothes, home appliances, your car. The only thing that is still built by hand are these buildings.

How does Contour Crafting work?

The Contour Crafting system is a robot that by automates age-old tools normally used by hand. These are wielded by a robotic gantry that builds a three-dimensional object.

Ultimately it would work like this,” says Brad Lemley from Discover Magazine. “On a cleared and leveled site, workers would lay down two rails a few feet further apart than the eventual building’s width and a computer-controlled contour crafter would take over from there. A gantry-type crane with a hanging nozzle and a components-placing arm would travel along the rails. The nozzle would spit out concrete in layers to create hollow walls, and then fill in the walls with additional concrete… humans would hang doors and insert windows.

This technology is like a rock that we have rolled to the top of a cliff, just one little push and the idea will roll along on its own.

- Khoshnevis told Discover Magazine

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