Caledonian Railway Bridge

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Caledonian Railway Bridge
King George V Bridge - geograph.org.uk - 628011.jpg
The Caledonian Railway Bridge on the left and the George V Bridge on the right
Coordinates 55°51′21″N4°15′32″W / 55.8558°N 4.2589°W / 55.8558; -4.2589
Crosses River Clyde
Characteristics
Material Steel
Total length702 feet 6 inches (214.12 m)
History
Opened1905 (second bridge)
Location
Caledonian Railway Bridge

The Caledonian Railway Bridge is a bridge crossing the River Clyde at Broomielaw in Scotland. It is adjacent to Glasgow Central Station.

Contents

First bridge

The first bridge First Caledonian Railway Bridge.jpg
The first bridge

The first bridge was built between 1876 and 1878 for the Caledonian Railway Company and opened on 1 August 1879. It was engineered by Blyth and Cunningham and built by Sir William Arrol & Co. [1] It consisted of wrought iron lattice girders linked at the top by a light arched lattice girder, and carried on a cast iron arch (visible in the photograph) over twin piers in the river. The piers are formed of cast iron cylinders sunk to bedrock and filled with concrete, and then extended above the river with Dalbeattie granite. [1]

The approach span over Clyde Place to the south was 60 feet (18 m) long and over Broomielaw to the north of the river was 90 feet (27 m) long. [1] The navigation spans were 164 feet (50 m), 184 feet (56 m) and 152 feet (46 m) long. [1] The bridge carried four tracks into the new Glasgow Central Station. [2]

In 1966–1967, the girders and tracks were removed, leaving the pillars in the water, after resignalling meant it was no longer needed. [3]

Second bridge

The piers of the first Caledonian railway bridge, with the second bridge next to it First Caledonian Railway Bridge - geograph.org.uk - 628004.jpg
The piers of the first Caledonian railway bridge, with the second bridge next to it

The current, second bridge was built in 1899–1905 during the expansion of Central Station, to a design by D. A. Matheson, chief engineer of the Caledonian Railway. Arrol and Co. was the contractor for this bridge as well. [3]

The foundations for the bridge are rectangular sunk caissons, sunk by the compressed air chamber method used on the Forth Bridge to a depth of up to 48 feet (15 m) below the river bed. The central span is 194 feet (59 m) long with Linville truss girders 15 feet 9 inches (4.80 m) deep. The parapet girders are around 10 feet (3.0 m) deep, and suspended on curved brackets. There are a minimum of eight parallel main girders in the width. The spans are of lengths 160 feet (49 m), 200 feet (61 m) and 178 feet (54 m), and the structure contains 11,000 tonnes (11,000 long tons; 12,000 short tons) of steel. [3] The total length of the bridge between the abutments is 702 feet 6 inches (214.12 m). [4]

The bridge varies in width from 35 to 62.5 metres (115 to 205 ft) and carries up to ten tracks. [3] It leads immediately into Glasgow Central Station on the north bank of the river. [5] At the time of its opening, it was believed to be the widest railway bridge in existence. [4]

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References

  1. 1 2 3 4 "Glasgow, Central Station, Old Approach Viaduct". Canmore. Historic Environment Scotland. Archived from the original on 12 March 2024. Retrieved 25 April 2024.
  2. "Caledonian railway bridge". Gazetteer for Scotland. Retrieved 18 July 2023.
  3. 1 2 3 4 "Glasgow, Central Station, New Approach Viaduct". Canmore. Historic Environment Scotland. Archived from the original on 13 August 2021. Retrieved 25 April 2024.
  4. 1 2 Matheson, D. A. (1910). "The New Clyde Bridge of the Caledonian Railway at Glasgow. (Including Appendix and Plates)". Minutes of the Proceedings. 182 (1910): 4–58. doi:10.1680/imotp.1910.16924.
  5. Google (12 September 2014). "Caledonian Railway Bridge" (Map). Google Maps. Google. Retrieved 12 September 2014.



55°51′20.8″N4°15′32.2″W / 55.855778°N 4.258944°W / 55.855778; -4.258944