1045 Avenue of the Americas in Manhattan. Left: courtesy Pei Cobb Freed & Partners. Right: Bess Adler / Thornton Tomasetti.

7 Bryant Park, 1045 Avenue of the Americas



Thornton Tomasetti provided structural engineering, connection design and Tekla modeling services for a new 30-story office building with two below grade levels located between 40th and 39th Streets. The mixed-use building is designed to offer expansive views of Bryant Park and its hourglass shape provides uniquely shaped feature windows at every floor.

The basic structural system consists of a core-first concrete core with surrounding steel framing. Project scope also includes the design of the structural steel connections and the production of a Tekla Structures model for structural steel members and their connections.

The predominant design feature is a recessed curve at the park entrance that tapers to a point at the 10th floor. Known simply as the cone, this unique geometry is created structurally by sloping columns. Many of the perimeter tower columns transfer onto large built-up plate girders at the 10th floor in order to create 60-foot column-free lease depths at the podium levels.

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