Here is a post I found from 3ders.org
A China company built a 3D Printer to print houses.
WASP The Italian company has created the world’s largest building a 3D printer – Big Delta. The dimensions of the device are 12 meters high and 6 meters in diameter.
Visit www.wasproject.it to learn more. Note use Google translate the page if needed.
Each year they keep pushing the limits.
Cars, tools, houses, and why not ships. My guess is that Thingiverse will have a full-size Titanic soon. HAHA