Prestressed steel products has made great progress since 1950s of the last century, there are two main points in its development trajectory. First, the strength of the material gradually increases, so that reduced the size and weight of prestressed components,even decreased the project cost ; Second, on the basis of improving strength, we should pay attention to the development of materials with high anti-corrosion performance, so as to improve the durability of prestressed steel components and save the maintenance costs.
