The method of construction of a cable stayed bridge is faster and simpler than that of a suspension bridge. The advantage of the cables being connected directly to the bridge deck and not draped like a suspension bridge allows building a lighter deck which saves money. The draped cables of a suspended bridge are enormous and incredibly heavy and require equipment such as helicopters or cableways to install. There is no need for this kind of equipment when draping the cables of a cable stayed bridge from one tower to the other because the cables are smaller and easier to install. The process involves laying the cables down on the deck and raising them to the towers to make the connection. At the beginning of the project you have a small bridge deck and short cables to install. Towards the end of the project you have longer cables to install but already have the longer deck constructed cantilevering from the towers.
The cable stayed bridge does not need big anchorages, because the bridge deck is attached to a multitude of cables that are directly connected to the towers. The more cables that are used means smaller forces to be carried and therefore smaller anchorages are sufficient. A suspended bridge is connected by two main cables, with other cables transferring the load from the deck to the main cables. Therefore they carry an incredible tension force that must be resisted by big anchorages placed at the two extremities on land.
In conclusion, from 750 ft up to 3000 ft a cable stayed bridge represents the best technical and economical solution. The project is scheduled to be complete in 2010.
Remember Me