bridge design

Tectonic. was selected to provide design and construction support services for four pedestrian bridges in Queens and Brooklyn: Crocheron Park over the Cross Island Parkway, 92^nd Street over the Belt Parkway, 17^th Avenue over the Belt Parkway and 27^th Avenue over the Belt Parkway.

This is a significant contract aiming to inspire future cultural communication and to modernize the landscape of New York City. This entails renewing the structural integrity of the pedestrian bridges, meeting ADA standards and balancing innovative design solutions with the traditional operating and maintenance practices.

The existing bridges are structurally deficient and functionally obsolete having substandard clearance and providing no access to disabled persons.

Cocheron Park Pedestrian Bridge is a three-span steel stringer, multi-beam structure located above the Cross Island Parkway in Bayside, Queens. The bridge spans a width of 3.66m and has an overall length of 27.43m. The superstructure consists of a timber deck and chain link fencing on either side of the deck. A graded asphalt sidewalk exists at the North end of the bridge and a concrete staircase with a steel railing is located at the south end. The substructure consists of wrapped timber columns and concrete stem abutments on concrete footings.

92^nd Street Pedestrian Bridge is a three-span multi-beam steel stringer structure located above the Belt Parkway in Brooklyn. The bridge has a span width of 2.829m and an overall length of 42.37m. The superstructure consists of a concrete deck and chain link fencing on either side of the deck. At either end of the bridge deck are concrete staircases with steel railings. The overhead clearance for the Parkway is 3.962m. The substructure consists of solid stem concrete piers and concrete stem abutments on concrete spread footings.

17^th Avenue Pedestrian Bridge is a single span steel arch structure located above the Belt Parkway in Brooklyn. The bridge crosses six travel lanes of traffic. The structure has a span width of 4.57m and an overall length of 38.41m. The superstructure consists of a concrete deck and arch girders with chain link fencing. Concrete staircases with steel railings exist at either end of the bridge deck. The overhead clearance at the center is 5.31m and 3.45m at the outer lanes. The substructure consists of two solid stem concrete abutments on spread footings.

27^th Avenue Pedestrian Bridge is a single span steel arch structure located above the Belt Parkway in Brooklyn. The bridge also crosses six travel lanes of traffic and has a span width of 5.18m and overall length of 36.58m. The superstructure consists of a concrete deck and arch girders with chain link fencing. Overall clearance at center is 5.77m and 3.76m at outer lanes. The substructure consists of two solid stem concrete abutments on spread footings.

Design services require Structural/ Bridge Engineering Design, Architectural Design, Electrical Design, Geotechnical Engineering Design, Civil Engineering, Landscaping, Lighting Design, Topographic/Survey Services and Arboricultural Services.