Tech

Time line on development of bridges

By kiara parmanand
  • 3300 BCE

    THE FIRST BEAM AND CANTILEVER BRIGES

    THE FIRST BEAM AND CANTILEVER BRIGES
    stone age people wanted safer ways to cross bridges and without getting wet, they began placing a pile of rocks in the centre of a river, where the first beams were made and then they would lay a slab of stone to the pile of stones and another piece from the supports of opposite sides.
  • 2100 BCE

    STONE

    STONE
    the wood did not last long so stones were the placed in replace of logs.
  • 1358 BCE

    PLANKS WERE LAID DOWN

    PLANKS WERE LAID DOWN
    a plank placed between a stepping stones. logs tied together formed wider decks or pathways to cross over.
  • 1200 BCE

    NATURALLY FALLEN TREES

    NATURALLY FALLEN TREES
    trees had fallen naturally over streams and rivers and helped people get across