Attaching Tower Cranes to Buildings in New York City

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by Dan Eschenasy, P.E., (M.ASCE), Chief; Structural Engineer, New York City Buildings Department.,,

Document Type: Proceeding Paper

Part of: Structures Congress 2011:

Abstract: The paper presents an overview of the issues related to the application of tower crane loads to buildings under construction. Intended for the structural engineers who design these buildings, it provides a primer on the derivation of these loads by the crane installation designers. Based on a review of tower cranes installations designs executed in New York City, the author finds that the attachments at the top of the structure can develop horizontal loads of same order of magnitude as the wind loads used for the base building design. Interaction and responsibility between crane and building engineers is examined. The building designers are better suited to evaluate the effects on the main lateral load resisting system. The crane installation designers need to use more consistency and clarity when presenting the loads for evaluation by the engineers of record.

Subject Headings: Cranes | Building design | Wind loads | Lateral loads | Urban areas | Horizontal loads | Load factors | Construction management | North America | United States | New York | New York City

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