Fratton Footbridge
CASE STUDY
Fratton Footbridge (17A/10) spans six electrified tracks at Fratton Station, comprising three riveted steel plate girder spans on cast iron columns. The structure was assessed as overstressed, requiring Robert West to design strengthening and refurbishment works, and ensure compliance with Network Rail standards.
An innovative U-frame solution was developed, integrating new U-frames into the concrete deck out-pans to provide lateral restraint to the top chords of the main girders. This approach significantly enhanced the structural performance by preventing buckling under load, thereby increasing the overall stability and capacity of the footbridge.
By targeting the root cause of the deficiency, the solution eliminated the need for extensive strengthening or full girder replacement, reducing both construction time and material use. This not only ensured compliance with modern loading standards but also minimised disruption to rail operations, improved safety during installation, and delivered a cost-effective, sustainable outcome.
This PACE project exemplified efficient design, close stakeholder collaboration, and smart use of technology to meet all regulatory and client requirements with minimal disruption.