Cass Hayward has designed many bridges to carry pedestrians and cyclists over railway tracks. Many of our bridges are adaptations of Network Rail’s standard design (SDD) using the traditional (LMR type) steel trough design for the main span and steel stringers for the ramps and staircases. Stringent procedures associated with safety in the high risk rail environment apply and use of the standardised designs helps with achieving compliance. A significant number of these are at stations (e.g. recently at Llanharan and Thatcham) and, prior to publication of the SDD, 14 bridges of this type were constructed to our design to replace level crossings on the West Coast Main Line.
Some of our bespoke solutions include a long, 50m span, weathering steel box girder bridge footway and cycleway bridge at Brockley Jack in South London. We designed this for single piece erection of the steel girder over the wide cutting and with precast concrete deck slabs that could be installed from above and which encapsulated a large diameter water main. At Manor Park station the new glass clad footbridge and approach walkway is to be constructed to our design.