Bridges

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Bridges




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Presentations text content in Bridges

Slide1

Bridges

By

James Hurley&

Lee Byrne

4th Class

Seomra 13

Slide2

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.

Slide3

What kind of bridges are there

There are several types of bridges such as.Arch bridge Suspension bridgeBeam bridgeTruss bridge

Slide4

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.

Slide5

Truss bridge

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

Slide6

Suspension bridges

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

Slide7

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.

Slide8

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

Slide9

Bridges in your local area

Bridges that are in Ireland our local area such as O connell bridgeThe ha penny bridgeWellington bridgeBurrin bridgeMillenium bridge

Slide10

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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