Renewing One of New York’s Iconic Bridges
For more than 15 years, we have provided structural rehabilitation and retrofit services for the Brooklyn Bridge, beloved for its gothic stone towers and mesh of criss-crossing cables. Our latest phase of work addresses for major improvement programs for the city’s Department of Transportation.
- Approach ramps rehabilitation – In-depth inspection and design for redecking ramp approaches, concrete deck on steel, and main approaches supported on brick arches. The design includes rehabilitation of the substructure for the approaches and ramps, lighting, striping, drainage, and maintenance of traffic.
- Franklin Square truss strengthening and retrofit – The Franklin Square Bridge is part of the Manhattan approach to the Brooklyn Bridge. Our work covers aesthetic retrofit of Roebling structure with structural steel arches to support the overloaded original trusses.
- Deck replacement design/build – This scope of this fast-track one-year effort covers emergency redecking of suspended spans and rehabilitation of 200 floor beams. We also provided construction staging, and construction support and inspection services during construction.
- Pedestrian vibration study – Following the August 14, 2003 electrical power blackout, massive pedestrian traffic over the Brooklyn Bridge led to reports of excessive vibration of the structure. We investigated the dynamic properties of the bridge, evaluated its vibrations under large pedestrian load, and performed analyses to identify natural vibration modes and recommended mitigation measures.