|Name||Cannon Street Railway Bridge, London|
|Design||Sir John Hawkshaw - Chief Engineer to South Eastern Railway|
|When||1866, widened 1893, strengthened 1913, 1983|
|Latitude||N 51 30' 30"|
|Longitude||W 0 05' 31"|
|Why||Railway over Thames into Cannon Street Station|
|Width||20.32 m. Carries 10 rail tracks|
|5 spans||39.6 m., 45.0 m., 45.0 m., 45.0 m., 39.6 m. The two shore spands are simply supported rivetted plate girders beams. The three central spans are continuous rivetted plate girder beams. The beams rest on sill cross girders which transmit the load to the columns. The flooring is riveted flat plate. New sill girders and new main girders were installed before 1927.|
|Materials||Girders: wrought iron 2.6 m deep - outer girders have double webs
Columns: Cast iron
|Foundations||Piers are cast iron columns 5.5 m. diameter and 3.7 m. above river bed filled with concrete abd brickwork.|
|How to read a bridge||Read more about beams.....
Read more about the book metaphor.....