Extradosed bridge is a variation of cable-stayed bridge.
This kind of
bridge utilizes stiff concrete deck and shallow cable stays.
As a result, the
bridge deck works more like an externally prestressed deck rather than a cable-stayed
bridge.
With this
arrangement, the height of pylon can be reduced.
When twin plane of
stays is used, the pylon height above deck can be reduced to 10% of main span
length.
Extradosed bridge is
an economic option for 100m to 200m span range.
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