Metal Bridge

Plate 11A Iron Bridge   IndiaIndiaIndiaIndia	11B Yamuna Bridge	11C Mumbai-Worli Bridge	11D Howrah Bridge

(Source:http://www.google.co.in/search?hl=en&sugexp=les%3B&cp=11&gs_id=o8&xhr=t&q=iron
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Howrah+iron+bridge+&oq=Howrah+iron+bridge+&gs_l=img.12...197351.205693.0.208202.8.8.0.0
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3ef741bff9&biw=1366&bih=664 ; Oct. 8, 2012)

Metal Bridges provided greater strength and stability compare to earlier usage of indigenous material (bamboo, rope, brick and stone). Because of the strength of metal (mostly iron) the bridges could be constructed in great length (plate 11A). Because of strength and stability metal bridge construction became the hallmark of modern bridges since the Industrial Revolution. India has large numbers of iron-bridges (plate 11B-11D) that are built in 19th and early 20th century by the British Empire. The bridges helped them for the land communication and transportation. Movement of resources and soldiers are essential for the administration.