SERVICES & PROJECTS > STRUCTURAL > BRIDGE DESIGN
Pedestrian Bridge Over Northbound Lake Shore Drive at 47th Street
Ciorba Group provided preliminary design and final design plans, specifications, and cost estimates for a new pedestrian bridge over Lake Shore Drive at 47th Street. The bridge provides pedestrians and bicyclists with a safer crossing of Lake Shore Drive and enhances the overall aesthetics of the area along Lake Michigan.
Our design included the removal and replacement of a 65-year-old plate girder pedestrian bridge with a tied-arch steel tube truss structure that spans 116 feet over four lanes of traffic. We designed the bridge to connect the existing bicycle trails on either side of northbound Lake Shore.
We minimized traffic interruption time by extensive use of prefabrication. The spliced truss was completed on site before erection and the bridge deck consisted of precast concrete planks that were assembled and connected to the top chord of the truss. A three-inch cast-in-place concrete wearing surface completed the deck.
Location
Chicago, Illinois
Owner
Chicago Department of Transportation
Cost
$2.3 million
Completion
2005
Services
Concept Study
Preliminary & Design Engineering