Pedestrian bridges utilising structural steel can span significant distances and be constructed with minimum disruption to often highly congested and busy public spaces.
City Walk Bridge, Barangaroo. Courtesy Elmasry Steel Design and Detailing.
In addition to the usual advantages offered by the use of steel in bridges, steel's application in pedestrian bridges presents some unique additional benefits:
Lightweight construction: allows steel to span further and, importantly, facilitates structures that structurally ‘push the envelope’ in terms of balancing forces, with cantilevers, extreme eccentricity and curved members
Torsionally stiff: stiffened box construction facilitates curved primary load-carrying members by resisting induced torque
Flexibility: facilitates designs to easily meet highly varying forces – and with optimised weight
Constructability: lightweight yet stiff, steel can allow complete sections of primary structure to be assembled adjacent to the final position and craned into place overnight, minimising disruption to busy thoroughfares. Prefabrication and portability have allowed significant spans to open up stunning walking trails in sensitive national park settings.
Falcon Street footbridge.