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Waldorf Astoria - Chicago (formally the Elysian) Chicago, Illinois

Wind and its dynamic effects governed the structural design of this 700-foot-tall residential building.

Waldorf Astoria Chicago

With the assistance of the Boundary Layer Wind Tunnel Laboratory, WSP USA, formerly Halvorson and Partners,  studied options for different combinations of structural stiffness and damping to develop a cost effective structural solution that incorporates a tuned liquid damper at the top of the building. The TLD is the latest approach to controlling perceptible motion in tall, slender buildings offering low cost, low maintenance and high performance over a broad range of wind conditions.