POST-TENSIONED STEEL FRAMES AND ERECTION OF SUCH

摘要

A method of constructing and erecting a post-tensioned steel frame structure consisting in: 1. Constructing on the ground a center span of the structure to each end of which are hingedly connected column structures; 2. Post-tensioning the center span by means of a cable to bring the span to a desired shape; and 3. Post-tensioning cables connected between each said column structure and the center span to produce relative rotational movement between the column structures and the center span about the hinge joints to raise the column structures from a substantially horizontal to a substantially vertical position thereby elevating the center span to its final position.