Patent ID: 6138309
Filing Date: 2000-10-31
Classification: E01D,Y10T

Abstract:
A method for forming a tension member for use in erecting a structure, comprising:providing a hollow, preformed elongated body to a desired length, said body having a first end and a second end, said body forming the outermost perimeter of the tension member;placing a tendon having opposing terminal ends through said elongated body so that said tendon extends axially within said body;placing a tension force on said terminal ends of said tendon;filling said body with concrete so that it surrounds said tendon, said body providing lateral confinement to said concrete;allowing said concrete to harden within said body and bond with said body and said tendon so that said tendon is prevented from axial movement;releasing said tension force on said terminal ends of said tendon so that said tension force is held on said tendon by said concrete, said body acting to confine said concrete; andcutting said terminal ends of said tendon after said tension force has been released;whereby said concrete contacts said tendon to maintain the tension force placed upon said tendon so that the tension member is prestressed to be in compression.