PARABOLIC BRIDGE

«I will build extremely light and strong bridges, which will be easy to transport and will serve to chase enemies or run from them». This one-span bridge has a parabolic profile and is secured to one of the two banks with a large vertical hinge. It is moved with ropes and hoists, aided by wheels or metal rollers that facilitate the sliding motion. It is also equipped with a counterweight tank, which balances the structure and helps manoeuvres when the bridge is suspended before being laid down on the opposite bank.