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One Vanderbilt Tops Out

October 10, 2019
At the topping out ceremony are Senior Building Information Modeler Luz Gault (left), Detailing Manager Dean Chin, Principal Steven Witkowski, Managing Principal Michael Squarzini, Project Engineer Tyler Schmidt, and Senior Engineer Jason Fiore. Thornton Tomasetti
he final piece of structural steel is raised during the topping out ceremony for One Vanderbilt. Thornton Tomasetti
Jim Gutmann of Hines, Steven Witkowski, Michael Ottavio of Hines and Michael Squarzini. Thornton Tomasetti

Less than three years after breaking ground, one of New York City’s tallest office buildings has topped out. The spire and final steel beam for One Vanderbilt, a 1,401-foot tower adjacent to Grand Central Station, were lifted into place during a September 19 ceremony. We provided construction engineering services to owner and developer SL Green and development manager Hines for the 67-story tower, helping the project meet its aggressive construction goals. We also worked closely with fabricator Banker Steel and engineer-of-record, Severud Associates.

“At the time, One Vanderbilt was one of the largest connection design and Tekla modeling projects we had ever undertaken in which ownership engaged us directly to collaborate with their design team,” Managing Principal Michael Squarzini said. “But our trusted partners, Hines and SL Green, saw the value in our advanced delivery method, and engaged us to ensure that the project’s schedule was met—it topped out three months early.”

When completed in 2020, the Kohn Pedersen Fox-designed building will boast more than 1.7 million square feet of office space. Located on a full city block, the Midtown Manhattan tower features column-free floors with floor-to-ceiling slab heights ranging from 14.5 to 24 feet, a 30,000-square-foot amenity floor for tenants and an 11,000-square-foot restaurant from celebrity chef Daniel Boulud. One Vanderbilt will also house a 4,000-square-foot transit hall connecting the skyscraper to the street and Grand Central Terminal.

Other members of the project team include mechanical engineer Jaros Baum & Bolles and construction manager AECOM Tishman.

“With the topping out of One Vanderbilt, this successful project now moves into the home stretch,” Principal Steven Witkowski, who led the project for Thornton Tomasetti, said. “For the past three-plus years, our superb construction engineering team worked in close collaboration with the design, construction, and ownership teams to bring such a large and complex structure to completion ahead of schedule and under budget. This is one of those memorable, feel-good projects that will be talked about for years to come.”