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A brief study of bridges

A brief study of bridges. We build different bridges for different needs. Covered Bridge. Covered Bridges. In the 18 th and 19 th century many bridges were covered. Covered Bridges. Why do you think these bridges were covered?. Covered Bridges.

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A brief study of bridges

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  1. A brief study of bridges

  2. We build different bridges for different needs

  3. Covered Bridge

  4. Covered Bridges In the 18th and 19th century many bridges were covered

  5. Covered Bridges Why do you think these bridges were covered?

  6. Covered Bridges Some say it was for protection from a sudden storm

  7. Covered Bridges Some say to keep horses from shying at the sight of rippling water

  8. Covered Bridges Some say to provided a romantic setting for a hug or kiss

  9. Covered Bridges However…

  10. Covered Bridges The real reason was to protect the timber from the effects of rain and snow 

  11. Beam Bridge

  12. Beam Bridge The simplest and least expensive Beam Sometimes called a girder

  13. Beam Bridge Can be made of steel

  14. Beam Bridge Concrete

  15. Beam Bridge or even wood

  16. Beam Bridge Not the best for long or high spans

  17. Suspension Bridge

  18. Suspension Bridge Better for Long spans More Majestic

  19. First suspension bridge in AmericaNewburyport, Mass. Built around 1900

  20. Golden Gate Bridge Perhaps the most famous bridge in the world Why is it called the Golden Gate?

  21. Golden Gate Bridge Perhaps the most famous bridge in the world It spans the Golden Gate Strait

  22. The worlds 10 longest spans are all suspension bridges

  23. Arch Bridge

  24. Arch Bridge Very strong Can last a very long time

  25. Arch Bridge This is Pont du Gard a 2000 year old Roman aqueduct

  26. Arch bridge This is a bridge built so that a stream of water could cross a stream of water

  27. Cable Stayed Bridge

  28. Cable Stayed bridge Long spans Elegant structure

  29. Sunshine Skyway BridgeSt. Petersburg, FL Requires Less labor Requires less material

  30. Sunshine Skyway BridgeSt. Petersburg, FL Similar to Clark bridge in Alton, IL

  31. Lift Bridge

  32. Lifting Bridge Do you know the name of this bridge?

  33. Lifting Bridge It is not London Bridge.

  34. Lifting Bridge Tower Bridge It is over 100 years old

  35. Truss Bridge

  36. Truss Bridge A truss can support from above

  37. Truss Bridge A truss can also support from below

  38. Truss Bridge What do you know about this bridge?

  39. Eads BridgeSt. Louis, MO Completed in 1874 American masterpiece

  40. A quick review

  41. Covered Bridges Makes use of local building supplies

  42. Covered Bridges Interior truss makes it stronger than wood beam bridge

  43. Covered Bridges Covering the timbers makes them last longer

  44. Beam Bridge Easiest to build Least expensive design

  45. Cable Stay Bridge Less expensive to build than suspension bridges

  46. Cable Stay Bridges Uses less material than suspension bridge

  47. Cable Stay Bridges They look cool!

  48. Cable Stay Bridges Requires the use of more modern materials

  49. Suspension Bridges Longest unsupported spans

  50. Suspension Bridges They look pretty cool too!

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