While the First Battle of Porto raged on March 29 1809 thousands of civilians attempted to flee a bayonet charge by the French imperial army by crossing the Ponte.

Pontoon bridge history. You can see one in the picture. LS soldiers walking across it. Separate pontoon bridges use multiple pontoons spaced along the bridges length.

Pontoons from around the region were used to build the bridge with sand poured over them. Sometimes the top of the pontoon is overlaid with the deck that supports traffic. As the name implies a continuous pontoon stretches the entire length of the bridge.

Pontoon Bridge - 480 BC A major obstacle in the path f the Persian King Xerxes army was the Hellespont a waterway at the head of the Aegean that was nearly a mile wide at its narrowest and separated Asia Minor from Europe. An early pontoon bridge was constructed in 480 bce by Persian engineers to transport Xerxes invading army across the Hellespont Dardanelles. Known as Jackpot Bridge Total length 1145 feet.

The worlds first floating bridge to be built using concrete pontoons it was designed by engineer Homer Hadley and constructed by the Puget Sound Bridge and Dredging Co at. It was a military style pontoon bridge. The first London Bridge was built about 53 AD.

Caligula then draped himself in a gold cloak donned the breastplate of Alexander the Great and crossed the bridge on his horse. A Boat-like Bridge to History. It allowed armies to move with great speed even when rivers crossed their p.

Construction time 16 hours 45 minutes Duisdorf Bonn Germany. Discover the history of a very important military invention - the pontoon bridge. The earliest recorded use of a pontoon bridge was by Cyris the Great in 536bc using skin covered pontoons.