|Name||Blackfriars Railway Bridge, London|
|Design||Sir John Wolfe Barry, Henri Marc Brunel|
|Contractor||Lucas and Aird|
|Where||Central London over the River Thames connecting City of London with Southwark|
|Latitude||N 51 30' 35"|
|Longitude||W 00 06' 12"|
|Why||The rail bridge is slightly further downstream than the Blackfriars Road Bridge and was originally called the St Paul's Bridge. The name was changed in 1937. It was the second of two bridges - the first, designed by Thomas Cubitt, was built in 1864 and demolished in 1985 - only the piers of that bridge remain - see the slideshow.|
|Width||5 railway tracks. The bridge will be part of the new Thameslink development|
|Spans||Five spans of 53.3 m. to 56.3 m.|
|Materials||Wrought iron arches||How to read a bridge||Read more about arches.....
Read more about the book metaphor.....
|How to read the bridge||Read more about the book metaphor...|
|Chapter 1||Suspension system|
|Letters||Steel: Iron, carbon with other additives such as chromium etc
Concrete: Cement, sand, aggregate and water
Reinforced concrete: Concrete is strong in compression but weak in tension where it has to be reinforced with steel bars
|Chapter 2||FoundationsIron caissons - filled with concrete. Piers have granite faced brickwork|
|Grammar||Technically the bridge is a way of taking forces from up in the air down to the ground. So imagine the flow of those forces through the structure. Think of a truck standing on the brdge and how its weight is transmitted through the bridge to the ground.