Bridge

Bridge isbuilt to span physical obstacles such as a body of water, valley, or road to cross the burrier. Itprovides passage over the obstacle. The design of a bridge and the usage of material largely depend on the nature of functioning. The nature of the terrain where the bridge is constructed, the material used to make it and the funds available to build it. From ancient time human beings have designed and developed bridges to cross land, water and mountain along with the difficult terrine. Bridges are made of bamboo, rope, brick, stone, metal, wire-cable, etc.

Bamboo Bridge

Plate 8A Bamboo Bridge	8B Bamboo Bridge	8C Rope Bridge

(Source: https://www.google.co.in/search?hl=en&q=Bridges&bav=on.2,or.r_gc.r_pw.r_qf.&biw=
1366&bih=664&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=nrxuULumBpDKrAflu
IFo#um=1&hl=en&tbm=isch&sa=1&q=bamboo+bridges&oq=Bamboo+Bridges&gs_l=img.1.0.0j
0i24l2j0i5i24.477.2822.0.6321.6.6.0.0.0.5.2321.9241.61j2j2j1.6.0...0.0...1c.1.EuasInkAZFM&pbx
=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=ef1e323bf5d9e1e5&biw=1366&bih=664 ; Oct. 5, 2012)