Five Crescent Drive in Philadelphia, Pa. Courtesy Halkin | Mason Photography (left) and Francis Dzikowski / Esto for Robert A.M. Stern Architects, LLP (right).



Thornton Tomasetti provided structural design for a four-story, 205,000-square-foot office building located at the Philadelphia Navy Yard Corporate Center. The LEED Platinum certified four-story building has a dramatic, full-height atrium with clerestory. Build-to-suit floor loading requirements for GlaxoSmithKline were incorporated into the design, which includes shared work stations, team tables, meeting areas, social areas and quiet rooms. Amenities include a fitness center, restaurant and retail services.

The project team worked on a 25-month fast-track schedule requiring early release of foundations and steel packages. This was achieved by using Tekla 3D modeling services and providing complete connection designs to expedite the steel fabrication. More than 1,400 tons of steel was used from design start to erection in less than nine months.

The building features sloping columns with an “H” shape plan and off center cores that created challenges for the design of load paths from lateral and gravity loads. The large sloped roof consists of landscaped areas for public access that can be used for conferences and receptions.

A four-story atrium features an oval spiral grand stair that extends more than 30 feet from floors without column support. It also features slim glass floor bridges spanning more than 50 feet across the atrium at each level.

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