Bridge sections composed of trapezoidal prisms are transported rolled up. Unrolled, the sections are connected together with hinges, and the bridge floats on the water.
Mechanics: winch; ratchet; projectile throwing engine; trigger.
Ramelli, Agostino. “Plate 147: Bridge for Crossing a City or Fortress Water Moat.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/8336h217s.
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