All we know about Howrah Bridge that this is the bridge which links two city howrah and kolkata(calcutta),but very few knows that before howrah bridge there was a bridge at the same location ,known as the Pontoon bridge.
here i describe about pontoon bridge,how it is made so
"A pontoon bridge is a collection of specialized, shallow draft boats or floats, connected together to cross a river or canal, with a track or deck attached on top. The water buoyancy supports the boats, limiting the maximum load to the total and point buoyancy of the pontoons or boats. The supporting boats or floats can be open or closed, temporary or permanent in installation, and made of rubber, metal, wood, or concrete. The decking may be temporary or permanent, and constructed out of wood, modular metal, or asphalt or concrete over a metal frame".
1855/6 In the view of the increasing traffic across the Hooghly river, a committee was appointed to review alternatives for constructing a bridge across it.1859/60 The plan was shelved
1868 The plan was revived when it was decided that a bridge should be constructed and a newly appointed trust vested to manage it.
1870 The Calcutta Port Trust was founded and the Legislative department of the then Government of Bengal passed the Howrah Bridge Act in the year 1871 under the Bengal Act IX of 1871, empowering the Lieutenant-Governor to have the bridge constructed with Government capital under the aegis of the Port Commissioners.
A contract was signed with Sir Bradford Leslie to construct a pontoon bridge.
1874 The bridge was completed at a total cost of INR2.2 million, and opened to traffic on 17 October of that year. The bridge was then 1,528 ft. long and 62 ft. wide, with 7-foot wide pavements on either side. Initially the bridge was periodically unfastened to allow steamers and other marine vehicles to pass through.
Pontoon bridges have been in use since ancient times and have been used to great advantage in many battles throughout history, among them the Battle of Garigliano, the Battle of Oudenarde, the crossing of the Rhine during World War II, and during the Iran–Iraq War Operation Dawn 8.
As the bridge could not handle the rapidly increasing load, the Port Commissioners started planning in 1905 for a new improved bridge(howrah bridge).
here i describe about pontoon bridge,how it is made so
"A pontoon bridge is a collection of specialized, shallow draft boats or floats, connected together to cross a river or canal, with a track or deck attached on top. The water buoyancy supports the boats, limiting the maximum load to the total and point buoyancy of the pontoons or boats. The supporting boats or floats can be open or closed, temporary or permanent in installation, and made of rubber, metal, wood, or concrete. The decking may be temporary or permanent, and constructed out of wood, modular metal, or asphalt or concrete over a metal frame".
1855/6 In the view of the increasing traffic across the Hooghly river, a committee was appointed to review alternatives for constructing a bridge across it.1859/60 The plan was shelved1868 The plan was revived when it was decided that a bridge should be constructed and a newly appointed trust vested to manage it.
1870 The Calcutta Port Trust was founded and the Legislative department of the then Government of Bengal passed the Howrah Bridge Act in the year 1871 under the Bengal Act IX of 1871, empowering the Lieutenant-Governor to have the bridge constructed with Government capital under the aegis of the Port Commissioners.
A contract was signed with Sir Bradford Leslie to construct a pontoon bridge.
1874 The bridge was completed at a total cost of INR2.2 million, and opened to traffic on 17 October of that year. The bridge was then 1,528 ft. long and 62 ft. wide, with 7-foot wide pavements on either side. Initially the bridge was periodically unfastened to allow steamers and other marine vehicles to pass through.Pontoon bridges have been in use since ancient times and have been used to great advantage in many battles throughout history, among them the Battle of Garigliano, the Battle of Oudenarde, the crossing of the Rhine during World War II, and during the Iran–Iraq War Operation Dawn 8.
As the bridge could not handle the rapidly increasing load, the Port Commissioners started planning in 1905 for a new improved bridge(howrah bridge).
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