Last year, a team at the University of Maine 3D printed a boat that is 7.62 meters long and weighs 2.2 tons. It got 3 Guinness World Records, the largest 3D printed solid part, the largest 3D printed boat, and the largest 3D printer. Their printer has a print volume of 30 x 6.7 x 3 meters and prints 227 kilos per hour!
https://www.3dnatives.com/en/3d-prin...ine-161020195/