Concept notes: The Howrah Bridge, also known as Rabindra Setu, is a famous cantilever bridge located in Kolkata, India. It is renowned for its unique construction technique, which does not use nuts and bolts. Instead, it is held together by rivets, making it a significant engineering achievement.
Explanation: The Howrah Bridge, officially known as Rabindra Setu, is a cantilever bridge that spans the Hooghly River in Kolkata, India. It is one of the most iconic landmarks of the city and is renowned for its unique construction technique. The bridge was constructed between 1936 and 1943 and is a significant example of early 20th-century engineering.
One of the most distinctive features of the Howrah Bridge is its construction without the use of nuts and bolts. Instead, the bridge is held together by over 25,000 rivets. Riveting is an old construction technique where metal pieces are joined by inserting a rivet and then deforming the end of the rivet to secure it in place. This method was commonly used in the early 20th century for large-scale construction projects, especially in bridge building.
The use of rivets in the Howrah Bridge is not only a testament to the engineering skills of the time but also a practical solution to the challenges of constructing a large bridge in a tropical climate. Rivets provide a strong and durable joint that can withstand the environmental conditions and heavy traffic that the bridge experiences daily.
In contrast, the other bridges mentioned in the options, such as the Vivekanand Setu, Maa flyover, and Nivedita Setu, are constructed using modern techniques that include the use of nuts and bolts. These bridges are part of the modern infrastructure of Kolkata and serve different purposes, such as providing additional roadways and reducing traffic congestion.
Understanding the construction techniques of the Howrah Bridge is important for appreciating its historical and engineering significance. It stands as a symbol of Kolkata's rich architectural heritage and continues to be a vital part of the city's transportation network. The bridge's unique construction method is a key factor in its enduring popularity and its status as a landmark of West Bengal.