Patent ID: 7761967

Claim:
A method of assembling a metal concrete forming assembly, comprising the steps of: (a) providing an outer telescoping tube having a main section with a first inside diameter and an end portion with a section having a second inside diameter reduced relative to the first inside diameter of the outer tube, and the outer tube having an access hole perforating the outer tube; (b) providing an inner telescoping tube having an end portion received for telescopic movement inside the outer tube and a deformation control opening perforating the inner tube; and (c) applying through the access hole in the outer tube a crushing force to the inner tube in the region of the deformation control openings to deform the inner tube to create a region having an enlarged dimension greater than the inside diameter of the reduced diameter section of the outer tube but less than the inside diameter of the outer tube to prevent the deformed region from moving past the reduced diameter section of the outer tube.