1. Features and Application of Concrete Poles

There are many advantages of pre-stressed concrete poles, so they are developing rapidly. Compared with common concrete poles, their strong points are as follows:

A. Saving a great deal of steel, about 30~70% (employing cold drawn steel wire can save 30%~60%; Employing high stress steel wire can save 40%~69%);

B. Crack resistance increased 3~5 times;

C. Rigidity increased 1~3 times;

D. Reducing the cost (using cold drawn steel wire can reduce 25%~40%; Using high stress steel wire can reduce 12%~21%);

E. Good durability, can delay the existence and expansion of cracks;

F. Protect the environment on which human beings depend on for existence, and reduce the deforestation.

2. A Summary of Pre-stressed Poles Development Trend

Pre-pressed concrete poles are produced strictly according to two standards namely GB396-94 Circular Reinforced Concrete Pole and GB4623-94 Circular Pre-stressed Concrete Pole of P. R. C., which guided enterprises and construction units for manufacture.