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Castle drawbridges The Castle Drawbridge - A Modern Bascule BridgeThe Drawbridge is now described as a Bascule type of bridge - a bascule bridge tilts upward to open. The drawbridge works by counterbalance so that when one end is lowered the other is raised - so that when one end is lowered the other is raised - the seesaw principle - moved by weights.
What Are Drawbridges? Draw bridges are bridges that can open or close. They also are really cool!