Bridge on Race
Philadelphia, PA

Bridging Style and Spirit in Old City

Bridge on Race, a mixed-use apartment complex at 205 Race Street in Philadelphia’s Old City, is an 18-story, 180,000 square foot, 146-unit residential building containing 10% affordable housing units and 14,000 square feet of street-level retail space. Other amenities include on-site car and bike parking, an outdoor roof deck, a fitness center, and an 8,000 square foot green roof.

The building was originally conceived structurally as modular. Due to the unusual geometry, financially, this structural system was not feasible. The Harman Group provided concept information for a filigree concrete system, which turned out to be cost effective.  The project was bid and awarded based on concept level information.

Challenges for the structure included a wildly erratic column grid, significant slab cantilevers (up to 15’-0”) and a large 5’-0” deep transfer beam at the 8th floor that cantilevers out 18’-0” to support the building above. With these cantilevers and a floor to floor façade system, structural deflections were critical. The Harman Group provided deflections (including creep) at several stages, including initial after shoring removal, at the time of façade erection, and long term.

The Harman Group was successful at maintaining the estimated construction quantities throughout the entire design, leading to a project that was structural on time and within budget.

This project was designed to achieve LEED Gold certification.

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Structural Systems Used

Cast in Place Concrete