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Bridges

The Øresund Bridge runs nearly 8 km (5 miles) across the Øresund strait between Sweden and Denmark. It cross from the Swedish...Read More >>The Øresund Bridge runs nearly 8 km (5 miles) across the Øresund strait between Sweden and Denmark. It cross from the Swedish coast to the artificial island of Peberholm from where a tunnel leads to the Danish island of Amager. The Øresund Bridge is the longest combined road and rail bridge in Europe.Bridges have been used since ancient times to span deep ravines, rivers and other stretches of water. Modern bridges are built using steel and concrete. They may carry roads or railways over rivers, wide estuaries or high valleys, or above other roads and railways. There are a number of different kinds of bridge design available, each of which may be used in a modern bridge according to the type of crossing required.


Beam bridges are supported on columns. Arch bridges are supported on strong arches. In a cantilever bridge, each section is...Read More >>Beam bridges are supported on columns. Arch bridges are supported on strong arches. In a cantilever bridge, each section is balanced on a central support. Suspension bridges hang from steel cables strung between towers. A cable-stayed bridge is held up by sets of cables.
An ancient clapper bridge, pictured in the foreground, built in Devon, England, during the Iron Age before the Roman conquest,...Read More >>An ancient clapper bridge, pictured in the foreground, built in Devon, England, during the Iron Age before the Roman conquest, and an 18th century arch bridge in the background.

Beam bridge

A beam bridge is one of the simplest and oldest designs. The beam is supported at each end. The earliest bridges were tree trunks or stone slabs laid across a stream supported by the banks. A clapper bridge is a type of beam bridge which is supported from beneath by several columns in the river bed or ground. The deck of a beam bridge may be flat or made from a hollow girder (truss) containing the road or railway.

The world’s longest bridge over water is the Qingdao Haiwan Bridge in China, which is 42.5 km (26 miles) long. The T-shaped bridge connects Huangdao District, the city of Wingdao and Hongdao Island.

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