The Dee Bridge collapse of 1847
Date & Time

11 October 2022
17:30 for 18:00 start

Location

Room T2.09, Trevithic Building, Cardiff University, The Parade, Cardiff, CF24 3AA
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Price
Free
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The Dee Bridge collapse of 1847

Lecture
Date & Time

11 October 2022
17:30 for 18:00 start

Location

Room T2.09, Trevithic Building, Cardiff University, The Parade, Cardiff, CF24 3AA
View on Google Maps

Price
Free
Availability

Places available

A technical lecture on the collapse of an early railway bridge, lessons that were learnt then, and lessons that can still be applied today.

The sudden collapse of this bridge, in May 1847, shocked the engineering profession during the height of the Victorian railway building mania.  Crossing the River Dee heralded construction of the Chester to Holyhead Railway under the renowned Robert Stephenson.
 
Alan Hayward narrates the failure of the three-span structure beneath a passenger train.  Its novel design of cast iron sections bolted together and reinforced by wrought iron suspension chains had included an early application of prestressing.  The design proved too frail and was shown to be flawed.  Seventy similar bridges throughout the country had to be propped and strengthened.
 
A major Inquiry into iron bridges followed.  Design standards were established for loading and safety factors were introduced.  New bridge forms emerged.
 
Lessons can still be learned today from this failure in that structures should not only have calculated strength but must be sufficiently robust.  This talk will educate and entertain all engineers, whether just starting out or with many years’ of experience.

Speaker

Alan Hyward FIStructE
Alan’s whole career has been in bridges.  With more than 60 years experience he has designed more than 200 rail, highway and footway bridges of all types.  He has been equally involved in the construction stage.  His designs have won 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 became chief engineer of bridge fabricators Fairfield Mabey.  In 1983 he co-founded Cass Hayward Consulting Engineers, bridge design and construction specialists.
 
In retirement Alan is a consultant to Cass Hayward and is involved with several Heritage railways.

Additional Attendee Information


Refreshments (Tea/coffee and welsh cakes) 17:30 for 18:00


 

 


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