Beginning in the 1950s as a European import, post-tensioned concrete has changed the face of American building construction. Starting from lift slabs with button-headed wires and evolving into flying forms and cast-in-place slabs post-tensioned with strand tendons, post-tensioning has become a common technique in American construction.

Ken Bondy began his engineering career in 1963 with the pioneering California firm of T.Y. Lin & Associates. He has been a part of the post-tensioned concrete industry since its inception in American buildings. In the following interview, Concrete Construction's senior editor S.C. McCraven asks him for insight into how and why post-tensioned concrete has become such a dominant force in American construction.