Early bridges were beam and arch bridges and modern ones are suspension and cable stayed. Materials used for early bridges were stone and wood and now they are concrete and steel.
The uses and loads of bridges have changed as well.
Some of our thoughts can be viewed at the link below.
https://rumaiwabish.wikispaces.com/
The uses and loads of bridges have changed as well.
Some of our thoughts can be viewed at the link below.
https://rumaiwabish.wikispaces.com/
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