The pace of change seems to be growing ever faster for the average design engineer. In the last few years, we have changed from the easily understood, if not too accurate, working stress Codes to the less familiar, if more realistic, limit state Codes. Coupled with this change, there has been a rapid increase in the volume of research work at universities and other establishments, which has been incorporated into the design methods. For many the results, in terms of practical structures, seems to have meant a great increase in the design time and little change in the final structure.
A.D. Weller