CABLE STAYED BRIDGES (one of the most innovative in man creations.)

A complete look over the cable stayed bridges.

"Cable-stayed bridges may look similar to suspension bridges—both have roadways that hang from cables and both have towers." 

. Cable-stayed bridges differ from their suspension predecessors in that they don't require anchorages, nor do they need two towers. Instead, the cables run from the roadway up to a single tower that alone bears the weight.

 The tower of the bridges will play a major role in balancing compressional forces.The cables attach to the roadway in various ways. For example, in a radial pattern, cables extend from several points on the road to a single point at the tower, like numerous fishing lines attached to a single pole. In a parallel pattern, the cables attach to both the roadway and the tower at several separate points.

PARALLEL ATTACHMENT PATTERN

RADIALLY ATTACHMENT PATTERN

Today in this modern world, these bridges are the first choice for every civil engineer.due to its less cable requirement, faster to build which inturns gives the best result.

HOW DO IT WORK :

Stand up and hold your arms out horizontally at each side. Imagine that your arms are a bridge, and your head is a tower in the middle. In this position, your muscles are holding up your arms. 

Try making cable-stayeds to support your arms. Take a piece of rope (about five feet long), and have a partner tie each end of the rope to each of your elbows. Then lay the middle of the rope on top of your head. The rope acts as a cable-stayed and holds your elbows up. 

Illustration of person with rope supporting arms Have your partner tie a second piece of rope (about 6 feet long) to each wrist. Lay the second rope over your head. You now have two cable-stayeds. Where do you feel a pushing force, or compression? Notice how the cable-stayeds transfer the load of the bridge (your arms) to the tower (your head).