Pontoon Bridge. Because they obstruct navigation floating bridges are limited in nonmilitary applications yet several long-span floating bridges have been built in modern times. According to Herodotus the bridge was made of 676 ships stationed in two parallel rows with their keels in the direction of the current.
Permanent floating bridges are useful for sheltered water-crossings where it is. A pontoon bridge is a bridge that floats on water. 15 Most pontoon bridges are designed for temporary use but bridges across water bodies with a constant water level can remain in place much longer.
A Pontoon Bridge can be placed in the water but must not be touching the ground.
It is a floating bridge with barges or boats pontoons to support the bridge deck. Pontoon bridge floating bridge used primarily but not invariably for military purposes. While pontoon bridges are usually temporary structures some are used for long periods of timePermanent floating bridges are useful for sheltered water-crossings where it is not considered economically feasible to suspend a bridge from anchored piers. A pontoon bridge or ponton bridge also known as a floating bridge uses floats or shallow-draft boats to support a continuous deck for pedestrian and vehicle travel.
