Bridges are structures built to span physical obstacles and allow transportation across gaps. They connect otherwise separate areas, facilitating movement and trade, which promotes economic development. There are several types of bridges including beam bridges, which use horizontal beams supported at both ends; arch bridges, which rely on the compressive strength of an arched design; suspension bridges, characterized by main cables anchored at each end and supported by tall towers; and cable-stayed bridges, which have towers connected to cables that support the bridge deck.

1. By –RISHABH GOVIND RAO 22102105
Bridges

2. A bridge is a structure that is built to span a physical obstacle, such as a river, road, railway, valley, or any
other gap or terrain that hinders transportation or access. Bridges are designed to provide a pathway for
people, vehicles, trains, or even utilities like pipelines and cables to cross from one side of the obstacle to
the other.
Functions are -
1)Connectivity : Bridges enable the connection of two otherwise separate areas, facilitating the
movement of people, vehicles, goods, and services.
2)Transportation: They are crucial components of transportation infrastructure, allowing roads,
railways, and pedestrian walkways to cross over natural or artificial barriers.
3)Economic Development: By facilitating transportation and trade, bridges play a vital role in
promoting economic development and regional connectivity.
Bridge

3. Types of Bridges
1) Beam Bridges (Girder Bridges): Beam bridges are the simplest type and consist of horizontal
beams that are supported at both ends. The load is primarily carried by the beams. They are
commonly used for relatively short spans, such as pedestrian bridges and highway overpasses.
Eg - Brooklyn Bridge in New York City, USA

4. 2)Arch Bridges: Arch bridges have a curved or arched design and rely on the compressive
strength of the arch shape to support the load. They are often used for both short and medium
spans and can be quite aesthetically pleasing. Historic examples of arch bridges include the
Roman aqueducts.
Eg - Sydney Harbour Bridge in Sydney, Australia

5. 3)Suspension Bridges: Suspension bridges are characterized by large main cables that are anchored
at each end and supported by tall towers. Vertical cables suspend the bridge deck. These bridges are
used for long spans and are known for their distinctive appearance.
Eg - Golden Gate Bridge in San Francisco, USA

6. 4)Cable-Stayed Bridges: Cable-stayed bridges have one or more towers that support cables that are
directly connected to the bridge deck. The cables distribute the load and provide stability. Cable-stayed
bridges are often used for medium to long spans and are known for their modern and elegant designs.
Eg - Millau Viaduct in Millau, France