(Youtube.com version if you are outside China) This is a time-lapse of a 15-story Ark Hotel in 长沙 (Changsa) being built; 48 hours for the basic structure and another 90 hours for the walls and windows. It can withstand a Richter scale 9 earth quake. It was built using 6x less materials than a similar building. More details here. … [Read more...] about 长沙两天建成15层新方舟旅店 – 15 Story Ark Hotel goes up in Two Days