Replacement of 3Rd Avenue Bridge

UrbanTech provided all construction related structural engineering services, including design of truss cambers, construction sequences and erection procedures for the replacement of a main artery between Manhattan and the Bronx, and geometric control. The trusses were constructed in Alabama and were transported to New York via barge.


UrbanTech worked with our naval architect to engineer an innovative supporting system to resist anticipated large wave and wind loads during the open water ocean tow. After the bridge arrived in New York, UrbanTech designed a spin and float-in operation to erect the bridge into position. In order to maintain the traffic during construction, UrbanTech also designed a temporary bridge connecting Manhattan and the Bronx.