This report was written by Prof. F. S. Rostásy, Institute of Building Materials, Structural Concrete and Fire Protection (IBMB) of the Technical University of Braunschweig, Germany. It was finalized in June 1988. The objectives of the report are outlined in the foreword to that report written by Prof. Bruggeling who at that time was the chairman of the FIP Commission "Prestresing Steels and Systems".weiterlesen