Manhattan West 9th Avenue Overbuild
New York, NY
Manhattan West 9th Avenue Overbuild

The Manhattan West development by Brookfield Properties, is a massive $4.5 billion skyscraper development which will be built just west of Penn Station in the heart of Manhattan’s new West Side. The development will consist of two commercial towers along with a third residential building built on land. The end result will transform the Hudson Yards into a vibrant, mixed-use district of retail and residential housing.

Our Role

The project started with the creation of a temporary steel and wood platform to support the first phase of the project. Phase One consists of the construction of a segmental pre-cast, post-tensioned, long-span box girder deck spanning approximately 240 feet over 14 active rail lines.

A specialized Launching Gantry and hauler/straddle carrier, being unloaded, assembled, and erected by our Metropolitan Walters team, is being used to install a 120,000-square-foot platform that will create the foundation of the development.  With the Launching Gantry in place, our team will unload 16 pre-cast segmental concrete box girders, each weighing over 2,100 tons, spanning 240 feet.

The end result will create a bridge that will span the train tracks bordered by 31st Street, 9th Avenue, 33rd street and Dyer Avenue in New York City.

Facts & Figures

  • Development anticipates LEED Gold certification
  • Each pre-cast segmental concrete box girder weighs 2100+ tons and is 36 ft. wide by 15ft deep
  • 600 construction jobs generated during the construction of the platform

Overcoming Challenges

Given that the project is happening over top of live train tracks, there is a great deal of coordination required to schedule construction around train schedules.  Safety is key in this project as there is live traffic underneath and adjacent to the site. The shear scale of the project and working within a confined space makes the logistics of the project challenging as well.

 

Perspectives

Engineers

This project is a true engineering feat. The logistical site construction and engineering required pushed us to blaze new trails. We had to consider many varying factors including positioning,  and using alternate jacking and hoisting methods.

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Location

W 31st St & Dyer Avenue, New York