Build LLC has built a 300 square foot tree house inside the Armory Building in Manhattan's Upper East Side, as part of a temporary installation. The tree house was designed, fabricated and constructed in four weeks. The structure's envelope is made from 29 prefabricated plywood ribs and wrapped with fabric creating a glowing "tube-lounge". The tube rests on four 26-feet tall by 14-inch diameter logs. A plywood and steel prefabricated staircase allows visitors to access the tree house floor which is 10 feet above the ground. More on the Build LLC blog.