New York City, USA
Skidmore Owings and Merrill (SOM) Architects
10,500 m² (115,000 ft²)
Structural Engineering Consultant
The Manhattan West Platform is the first stage in a commercial development project to reclaim 2.6 acres of land over the busiest commuter rail corridor in North America. Set to be completed in early 2015, the platform will serve as the foundation for a plaza and public space over previously uncovered railway tracks and serve part of a new 5.4-million-square-foot office development in west Manhattan.
The project requires constant coordination with Amtrak and the Long Island Railway, and with the design and construction of Amtrak’s new High-Speed Rail terminal at Moynihan Station, directly east of the site.
The project involves the construction of an innovative 240-foot span platform structure using post-tensioned precast technology, a rarity among commercial construction projects. Brookfield Properties retained Entuitive to design the foundations and platform support beams, and to develop the structural design of the long-span platform.
Challenge: It was essential in the design of the platform to minimize, or completely avoid, disruption of rail service to New York’s Penn Station.
Solution: Entuitive developed a design that incorporates deep post-tensioned segmental precast box girders to span 15 tracks, allowing crews to avoid intrusive construction at track level.