9th Avenue Deck Cover Structure

(Manhattan West)

Manhattan, New York


Project Description

Brookfield Manhattan West at Ninth Avenue and 33rd Street will be a dramatic, environmentally sustainable addition to the Midtown Manhattan skyline. It is a five-acre site, with over five million square feet of office and mixed-use development. One block west of Penn Station, Brookfield's development lies at the heart of Manhattan's new West Side. Offices, hotels and residences are planned for surrounding blocks, including redevelopment of the adjacent Farley Post Office as the new Moynihan Station. Brookfield Manhattan West's iconic towers, flanking a grand outdoor plaza, will mark the centerpiece of Midtown West. The two office towers will soar as high as 62 stories above what is currently undeveloped property. Railroad tracks leading in and out of New York’s Penn Station are located, partially uncovered, 65 feet below grade. McNary Bergeron utilized post-tensioned precast segmental bridge technology to design a deck over these tracks, allowing for the construction of the office towers without disrupting the passage of the trains. The precast segments were erected with overhead gantry using span-by-span method. The new structure included 16 girders aligned side by side, each girder approximately 240’ long with 39 precast segments with a total width of 16 girders side by side is approximately 573’. Total deck area of approximately 137,500 square feet. Hatcher Technical assisted McNary Bergeron in the preparation of design drawings, performing constructability reviews and producing fully integrated shop drawings for construction.


         Services by Hatcher Technical

Hatcher Technical worked with design and construction engineer McNary Bergeron to provide:

  • Design drawings for the 16 girders and topping slab that form the deck structure
  • Constructability reviews through the design process
  • Fully integrated shop drawings for the precast segmental girders (624 total segments)