Repairing bridges on Heritage Railways (postponed)
Date & Time

12 May 2020
17:30 - for 18:00 start

Location

47-58 Bastwick Street, London, EC1V 3PS
View on Google Maps

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Repairing bridges on Heritage Railways (postponed)

Lecture
Date & Time

12 May 2020
17:30 - for 18:00 start

Location

47-58 Bastwick Street, London, EC1V 3PS
View on Google Maps

Availability POSTPONED

Due to concerns relating to the Covid-19 epidemic, this event has been postponed.

Most heritage railways were established following the 1960s railway closures. Enthusiasts' interest understandably focussed on the restoration and maintenance of steam locomotives rather than infrastructure.

In recent years a deterioration of bridges built in the 19th century has led to a need for repairs or replacement, with tightening of regulatory needs.

Bridge substructures including brick or masonry arches generally proved to be durable, needing only minor repairs. Metallic superstructures (sometimes with timber flooring) have deteriorated due to corrosion, generally from ingress of water to inaccessible bearing areas.

Methods of repair include over-plating or insertion of new steelwork. Strengthening by concreting is described to achieve composite action. In many cases repairs are found not feasible or are totally uneconomic.

Reconstruction is then the only option in steelwork or precast concrete. Where possible, historic features such as parapets are retained. Modern construction generally means that outmoded forms such as troughs with longitudinal timbers or cast iron girders are not imitated.

 

Speaker:

Alan Hayward’s career has been in the design and construction of bridges. With a half century of experience he has designed and been involved with construction of more than 200 bridges, winning eight national awards.

He trained with British Railways as an Articled Apprentice from 1957, worked for contractors Dorman Long and Cleveland Bridge before becoming a senior designer with Mott Hay and Anderson.

Returning to contracting, he was appointed Chief Engineer of Fairfield Mabey.

In 1983 he co-founded Cass Hayward Consulting Engineers, bridge design specialists. Now retired, he is a consultant to Cass Hayward and is involved with several Heritage Railways.

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