- Last Updated: Monday, 20 August 2018 14:30
- Written by GRAHAM BROOKS
Stone bridge come in all shapes and sizes. From simple flat stones across a stream to multiple arched viaducts that can span deep valleys or carry railways over vast areas above houses etc. In Britain stone bridges date back to the roman period. During the medieval and early modern period a lot of bridges were built of wood. Few original wooden bridges survive but numerous small footpath and farm access bridges are still made of wood.
The development of iron making eventually lead to the building of the Iron Bridge in Shropshire. A verey wide variety of designs for iron/steel bridges have been produced over the years to cover all eventualities.
A large number of modern bridges are now built of concrete.