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Bridges

Bridges. By James Hurley& Lee Byrne 4th Class Seomra 13. What are Bridges? Why do we Use bridges?. Bridges are built over roads, railway lines, vallies,bays, ravines and rivers We use bridges to connect one place to the other. What kind of bridges are there.

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Bridges

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  1. Bridges By James Hurley& Lee Byrne 4th Class Seomra 13

  2. What are Bridges?Why do we Use bridges? Bridges are built over roads, railway lines, vallies,bays, ravines and rivers We use bridges to connect one place to the other.

  3. What kind of bridges are there There are several types of bridges such as. Arch bridge Suspension bridge Beam bridge Truss bridge

  4. Arch bridges • Arch bridges can be supported by the bottom or the top. • Sydney harbour bridge has support on the top. • The arch makes the bridge stronger.

  5. Truss bridge • Truss bridges is made by joining together lengths of steel into a framework.

  6. Suspension bridges Suspension bridges have cables hanging down from the top. There is a suspension bridge in San Francisco at the pacific ocean. It is called The Golden Gate bridge.

  7. Beam bridges The simplest type of bridge is very simple!It is just a BEAM supported at each end such as a tree trunk resting on each bank of a stream.

  8. Famous bridges • There are lots of famous bridges around the world such as: • Golden Gate bridge in San Francisco America • Brooklyn bridge in Brooklyn America • Sydney harbour bridge in Sydney Ausraila • Akashi kaikyo also known as Perth bridge in japan

  9. Bridges in your local area Bridges that are in Ireland our local area such as O connell bridge The ha penny bridge Wellington bridge Burrin bridge Millenium bridge

  10. Intresting facts • The longest bridge span is akashi kaikyo also known as perth bridge with the length 1990m thats 2km without support • The Golden gate bridge is 1280m wide.It was completed in 1937. • Highest bridge royal gorge bridge colorado usa height a dizzing 321m above river level the empire state building could nearly fit underneath. • At 48.8m wide, Australias Sydney Harbour bridge is the worlds widest bridge.

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