Report on Session Two
Pages 1

Dr Till y presente d a n interestin g accoun t o f th e histor y o f bridg e continuit y an d showed severa l examples o f early bridges dating from 160 0 BC built in stone , brick masonry, iron, concrete and steel t o the more modern designs pos t 1950 . H e wen t on t o explai n th e possibl e mechanism s outline d i n hi s pape r togethe r wit h th e reasons why such early bridges were able to cope with the temperature effects . H e considered that there was a need fo r a review of the current allowances being made for temperature effects i n the light o f satisfactory performance of so many jointless bridges in recent years.