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Development Of Bridges

By E.S
  • 15,000 BCE

    The First Bridge

    The First Bridge
    This took the form of trees, which had fallen over naturally over sources of water like rivers and lakes.
  • 1523 BCE

    Plank Bridge

    Plank Bridge
    As time progressed, planks were then used. They were placed between stepping stones and were tied together.
  • 1500 BCE

    Clapper Bridges

    Clapper Bridges
    Slabs of granite and stones were placed over streams. If the river was too wide then they placed a pile of rocks in the centre for support. A slab would be laid to the pile of stone and another piece from the support to the opposite sides,
  • 142 BCE

    Roman Viaduct Bridges

    Roman Viaduct Bridges
    Romans invented the viaduct, a road supported on a number of arches made from stone.
  • 1570

    Truss Bridge

    Truss Bridge
    Beams or girders of reinforced concrete are used.The simplest design is not supported at either sides. It has framework that is strengthened with metal supports or trusses as railings. It was originally made from steel was used. Today it is made from concreted and reinforced with steel.

  • Suspension Bridge

    Suspension Bridge
    These are bridges with the longest spans. Majority of the support derives from a pair of huge cables that are draped above the gap by pillars at either ends.

  • Cantilever Bridge

    Cantilever Bridge
    This type of bridge is only supported at one end, The other side hangs freely in mid air. It has two cantilever arms reaching into the centre from the piers at the sides.