The Qingdao World Expo City project is a cross-shaped exhibition gallery running 507m in the east-west direction and 287m in the north-south direction. The gallery is open to all sides and connects 12 independent exhibition halls around the site. Innovative ideas implemented in the project include a prestressed cable-arch structural system with triangular flexible ties at the middle and rigid struts near the supports, polycarbonate plates on the roof, and various optimised connections.
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