- A flat surface over two supports
- A flat surface over three or more supports
- A flat surface over an arched support
- A flat surface with turned up edges
- A bridge with sides made up of a series of triangles
- A bridge that appears to hang from strong strung cables
- A pulley(s) and a rope or cable
- A slingshot or other device used to project something
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- Catapult
- Pulleys
- Beam
- Bridge
- Plank
- Suspension Bridge
- Truss Bridge
- Levers
- Block and Tackle
- Arch Bridge
- Pier Bridge
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