Meeting the challenges of the Falmer footbridge upgrade, Gatwick

31 January, 2017 | 18:00 - 20:00

The newly completed upgraded bridge.
The newly completed upgraded bridge.

About this event

This talk will cover the design and construction of the replacement for part of Falmer Footbridge on the A27 trunk road near Brighton.

Built in 1980, the ramp of this concrete structure was showing signs of advanced alkali silica reaction and was in need of replacement. Being stepped, and with a gradient of 1 in 6, the previous ramp was also substandard to modern accessibility codes.

A new 50m long structure was built in the summer of 2016, consisting of six continuous spans on a gradient of 1 in 20. The structure curves both one way then another, creating a snaking effect as it descends to meet the ground. The structural system is a prefabricated steel box girder, which rests on five, slender circular steel columns.

The project had several challenging logistical constraints to contend with, including; existing almost directly over a rail tunnel, being situated within meters of a busy trunk, onerous ecological constraints, and the requirement to keep the adjacent footbridge open to traffic throughout the works.

Our speakers will be Alistair Oliver, formerly Senior Structural Engineer at Mott MacDonald (now with CH2M), and Yaso Myuran, formerly Structural Engineer at Balfour Beatty (now also CH2M).

Event materials

The following materials are available for download: