Editing Tubular bridge (section)

{{Refimprove|date=March 2013}}
{{BridgeTypePix
  |type_name=Tubular bridge
  |image=Conwy Castle and Railway Bridge.jpg
  |image_title=[[Conwy Railway Bridge]] 
  |descendent_names=[[Box girder bridge]] 
  |ancestor_names=[[Plate girder bridge]]
  |carries=[[heavy rail]]
  |span_range=Medium
  |material=[[Wrought iron]]
  |movable=No
  |design=Very high
  |falsework=Depends upon length and degree of prefabrication
}}
A '''tubular bridge''' is a [[bridge]] built as a rigid [[box girder]] section within which the traffic is carried.<ref>{{Cite book
  |last=Chrimes  |first=Mike
  |title=Civil Engineering 1839-1889
  |year=1991
  |publisher=Alan Sutton Publishing
  |isbn=1-84015-008-4
  |page=47
}}</ref> Famous examples include the original [[Britannia Bridge]] over the [[Menai Strait]], the [[Conwy railway bridge]] over the [[River Conwy]], designed and tested by [[William Fairbairn]] and built by [[Robert Stephenson]] between 1846 and 1850, and the original [[Victoria Bridge (Montreal)|Victoria Bridge]] in Montreal.