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DESIGN OF RANDOM HOUSE WORLD HQ/THE PARK IMPERIAL HONORED WITH THREE INDUSTRY AWARDS
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01/16/2005
New York, NY (September 16, 2003) ? Thornton-Tomasetti Engineers? design of the new, mixed-use Random House World Headquarters/The Park Imperial in Manhattan has been recognized with three prestigious industry awards from the New York Association of Consulting Engineers (NYACE), the Concrete Industry Board (CIB) and New York Construction News. The $170-million, 840,000 square-foot building consists of a 25-story concrete, luxury residential building, The Park Imperial, atop the 25-story world-class headquarters for Random House constructed in steel, as well as two levels of underground parking and ground-floor retail space. This remarkable structure rises 675.5 feet above street level. The project design was honored by NYACE with the organization?s highest honor, the Diamond Award, during their 2003 Engineering Excellence Awards gala. The Random House design by Thornton-Tomasetti was also recognized with Awards of Merit from the Concrete Industry Board and New York Construction News. The intricate structure posed a number of design challenges for Thornton-Tomasetti?s structural engineers. Besides effectively handling the expected engineering issues of any high-rise building, Thornton-Tomasetti was faced with designing the interaction of the different building materials on a fast-track schedule, while saving the client money. A critical engineering challenge was the massive transferring of loads between the concrete structure above the steel office building. A unique combination of an outrigger system and pick-up girders and trusses was designed between the 26th and 27th floors to enhance the building?s lateral systems. The pick-up girders up to 87? in depth span to transfer trusses that also serve as the outriggers. The outrigger system consists of five east-west and two north-south trusses spanning the building, which vastly reduces the core overturning moments and net tension in the building?s columns. By combining the outrigger system and transfer trusses, the building?s steel tonnage was greatly reduced, resulting in a more economical building. A Tuned Liquid Column Damper (TLCD) system was designed at the top of the building to reduce wind-induced oscillations at the upper occupied residential floors. The system consists of two U-shaped concrete tanks, each approximately 20? wide by 70? long and 12? tall, filled with water. The TLCD system converts wind-induced energy into heat energy and dissipates it into the water, resulting in reduced energy costs and sizeable cost savings over other measures available for improved tenant comfort. This is the first time a TLCD was used in a building in the U.S. The Thornton-Tomasetti Group Inc. is a 450-person, international engineering and design firm, headquartered in New York City, that provides a wide cross-section of services to building industry clients through its three divisions. Thornton-Tomasetti Engineers offers structural engineering design; LZA Technology specializes in multidisciplinary building investigations, restoration engineering and design and advanced technologies; LZA Associates provides complete building design services for specialized facilities with complex systems. The firm maintains 10 offices in the U.S. and offices in Hong Kong and Shanghai. More information on the firm is available at http://www.TheTTGroup.com.
