Image: Jill Tate
Numerous challenges were overcome during the design stage for the Chiswick Park Footbridge – a new three-span arched structure that connects a business park with Chiswick Park Underground Station.
Commendation: Chiswick Park Footbridge
Architect: Useful Studio
Structural engineer: Expedition Engineering
Steelwork contractor: Severfield
Main contractor: Lendlease
The designers had to incorporate a dominant 45m-long span over Network Rail Overground lines with the necessary constraints, as well as allowing for a restricted landing site at one end that includes a 4.5m drop in level. A minimum road height clearance for double-decker buses had to be included in the central span. Added to the above, the bridge had to curve along its entire length.
A lightweight solution was needed to ensure that the 45m-long Network Rail span could be lifted into place from nearby Chiswick Park.
The arch was designed as a network arch (close-centred crossed cables), producing a highly efficient structure that acts as a stiff mesh to control pedestrian dynamic effects and enables the bridge to be slender.
This is only the second network arch footbridge constructed in Europe.
Produced by the BCSA and Steel for Life in association with Construction Manager