Six Basic Types of Bridges
- Beam Bridge: Horizontal beam on piers/abutments; simple, short spans (concrete, steel, wood).
- Arch Bridge: Curved arch transfers load to ground; strong, durable, longer spans (stone, concrete, metal).
- Suspension Bridge: Deck hung from cables on towers; for very long spans over water.
- Cantilever Bridge: Arms project from opposite shores to meet mid-span; crosses rivers/canyons.
- Truss Bridge: Triangular truss units form rigid structure; efficient for medium spans (steel, wood).
- Movable Bridge: Opens for waterway traffic; types include drawbridge, swing, bascule.
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