The 35^th Street Pedestrian Bridge is a 620-ft-long single-cable, concrete suspension bridge constructed in a reverse S curve over Lake Shore Drive and the adjacent Metra tracks. The superstructure is a 32’-6” wide, hollow post-tensioned concrete trapezoid with a constantly changing apex. The center pylon reaches a height of approximately 120’-0” and provides support to the 500’-0” main span.

JSE provided the construction engineering services for this structure. JSE changed the contract proposed erection scheme of balanced cantilever to cast-in-place on falsework. During the construction analysis, JSE discovered a critical flaw in the original design and worked closely with the contractor and original designer to implement the necessary design changes into our construction engineering package.

The specific services provided by JSE include: Fully Integrated Shop Drawings of the Post-Tensioned Superstructure, Falsework Design and Detailing, Formwork Design for Superstructure, Overall Erection Procedure and Plan, Geometry Control Plan, Post-Tensioning Drawings and Calculations, Steel Erection Drawings, Design of Pylon Erection Aids and Suspension System Engineering.

Total Length:   620’

Main Span:      500’

Width:              32’-6”