New York City, USA
Skidmore Owings and Merrill (SOM) Architects
10,500 m² (115,000 ft²)
Structural Engineering Consultant
2015, ACEC Engineering Excellence, Diamond Award for Structural Systems
2016, The Institution of Structural Engineers Structural Awards, Transportation (shortlisted)
2017, Award of Excellence Winner, Post-Tensioning Institute
The Manhattan West Platform was the first stage in a commercial development project to reclaim 2.6 acres of land over the busiest commuter rail corridor in North America. The platform serves as the foundation for a plaza and public space over previously uncovered railway tracks and serves part of a new 5.4-million-square-foot office development in west Manhattan.
The project required 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 involved 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.