Cantilever Bridges -

Cantilever bridges are built using cantilevers—horizontal beams that are supported on only one end. Most cantilever bridges use two cantilever arms extending from opposite sides of the obstacle to be crossed, meeting at the center. The largest cantilever bridge is the 549-metre (1,800 ft) Quebec Bridge in Quebec, Canada.

The Quebec bridge from the east side, with the Pierre-Laporte bridge in the background.


  • iron,
  • structural steel,
  • prestressed and reinforced concrete.