Drawbridge

castles · medieval · engineering · defense

Castle Protection. Drawbridges guarded the entrance to castles and towers surrounded by moats. By raising the bridge, defenders could trap invaders on the other side of the water and keep their home safe.

Chains and Pulleys. Most drawbridges used heavy chains or ropes attached to pulleys and counterweights to raise and lower the bridge smoothly. This made it easier for a few people to lift something that weighed many tons.

Moat Defense. The moat beneath a drawbridge was often filled with water to make crossing even harder for attackers. A raised drawbridge combined with the moat created a powerful two-layer defense system.

Multiple Types. While modern drawbridges include bascule bridges that tilt up, vertical-lift bridges that rise straight up, and swing bridges that rotate sideways, the historical castle drawbridge was specifically designed as part of fortress defenses.

Daily Crossing. When the castle was at peace, the drawbridge would be lowered so people like merchants, visitors, and residents could cross over the moat and enter through the castle gates.