These pictures below distinguish three specialized modes of bridges including arch bridge, concrete girder and suspension one.

These pictures below distinguish three specialized modes of bridges including arch bridge, concrete girder and suspension one. The analysis emphasizes on their shape, size and construction techniques demands. Firstly, the arch bridge is shaped into a round curved upward with the longest distance between two shores that it can connect grow up to approximately 100 meters. Whereas, the concrete bridge symbolizes a straight and plains surface with no differences of height throughout the whole body. Especially, this model can be expanding to no limits of length so that's why people tend to construct it for the river regions while the most modern one- suspension bridge's appearance is likely to a half circle downward. The arch bridge is the oldest model so the techniques that demand in building them is quite easy along with the highest distance from the top to the water ground can be up to 100 meters which can be settle up on all kinds of lake and suitable for small ship to cross over its vault. The supreme length is what makes the bridge made out of concrete so special due to the number of piers. Each pier is rooten down about 100 meter to the underground and available for both soft and hard topographic features. Constructors often place them 200 meters far from their fellows which create a considerable space for a medium cruise ship size. The suspension bridge is claimed to have the mostly difficult and strict demand of architectural techniques. This form of bridge emphasis most of the weight on 2 enormous piers which rooten deep down in to the rock sea surface in other to create 2 sturdy fulcrum so it typically set across the sea. Moreover, this morden bridge can allow all mode of maritime transportation benefiting shipping traffic and marine economy even also international transactions.