A Bridge is a structure worked to traverse span a valley, road, river, body of water, or some other physical hindrance. Outlines of Bridges will shift contingent on the capacity of the extension and nature of the territory where the scaffold is to be developed. The principal spans were made by nature itself—as straightforward as a log fallen over a stream or stones in the stream The principal spans made by people were most likely traverses of cut wooden logs or boards and in the long run stones, utilizing a straightforward help and crossbeam course of action. Some early Americans utilized trees or bamboo shafts to cross little natural hollows or on the other hand wells to get starting with one place then onto the next.
A typical type of lashing sticks, logs, and deciduous branches together included the utilization of long reeds or other reaped filaments woven together to form a connective rope fit for authoritative also, holding together the materials utilized as a part of early scaffolds. Uneven district posture one of a kind issue for connecting development. In a confined bumpy territory itself climatic conditions, topographical highlights, and hydrological parameters fluctuate extensively. Keeping in see the scaffold site and different limitations, sort of extension and strategy for development are to be chosen deliberately for protected, temperate and fruitful culmination of extension development.