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.
The model is based on the drawing:
- Codex Atlanticus f. 855 r. (1480-1482)
Milano, Biblioteca Ambrosiana