SMEC was engaged to provide detailed design services on the project. During the design stage, consideration was given to the long term functionality of the bridge, with the main deck able to accommodate the projected future increase in the number of pedestrians using the bridge on a daily basis.
Dubbed The Walking Wonder Isando Pedestrian Bridge stands as a visible marker to the current efforts to upgrade the freeways in and around Johannesburg.
With a total length of 446 m, the bridge and its approaches connect the Isando Rail Station with the OR Tambo International Airport, replacing two substandard bridges.
The main structure (crossing the highway) is a 126 m long cable stayed bridge with a 4-span configuration. The superstructure consists of a continuous composite steel box girder with a 5.4 m wide concrete deck slab. The 64 m long main span is supported by two vertical planes of fanned cables that are anchored into the back spans.
A main feature of the bridge is its two un-braced cigar shaped steel pylons. The versatility of the structural steel used during construction made the final form of the structure possible.
The bridge includes a 4.5 m wide walkway, providing an improved level of service to peak hour commuters, serving over 9,000 pedestrians daily.
- South Africa
- Technical Area:
- Transport, Bridges and Structures
- South African National Roads Agency SOC Ltd.