When natural materials are used for building, additional maintenance or care is needed. This is because the impact of wind forced on the structure or the wind load causes an arch bridge to bend and move. Thus, frequent care becomes necessary. This may further give rise to extra maintenance costs.

　　Arch bridges have a long construction time. For the proper and normal functioning of these bridges, they have to be built in a particular way. Thus, their construction requires more time, mostly noticed in the case of natural materials. Also, more labor may be required.

　　Arch bridges can be constructed in only certain locations where the foundations on both sides are solid and stable. This is because this type of bridge needs more support from its sides.

　　There is no doubt that by incorporating(把……融入arches into the design of arch bridges, they have gained some definite advantages. However, no matter how fantastic their design is, there are still some drawbacks that cannot be avoided. So we can conclude that the decision of having an arch bridge can be made by considering the aforementioned pros and cons.

　　Arch bridges

　　General

　　introduction

　　●Arch bridges have been in

　　1

　　for thousands of years.

　　●Their common building materials used to be bricks and stones, and now many new materials like concrete and steel have been used, because of which the arches are built more

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