Sub Structure
They are supported by pillars are column's.
A bridge with overhead cables to support it.
a suspension bridge
The Chinese bridge is called Kangshaun great bridge
London Bridge doesn't have any support cables.
You can use so called "Bridge" which allows you to extend networks wirelessly. You have to have at least two routers better from the same manufacture with the bridge function support.
A bridge pier is the structure on which the bridge rests.
because of the support of the circles
a circle shape
Is it the Brooklyn Bridge
Arches are among the oldest forms of structural support. Unlike beam bridges, arch bridges are curved. The arch carries the weight outward along the curve to the supports on each end of the bridge, called abutments. The abutments carry the load and stop the bottom of the bridge from spreading out.