| 摘要 |
PURPOSE: A prestressed concrete girder of wide top narrow bottom shape and a cascading method thereof are provided to reduce manufacturing costs and construction period. CONSTITUTION: A prestressed concrete girder of wide top narrow bottom shape comprises a flange(100), a sheath ball(110), a steel wire(120), and a main body(200). The flange is composed in the top. The sheath ball is formed on the lower-part of the upper flange. The main body is reversed triangle which has tapered lower part. |
