The following principle is taken from Abeles (Ref. 2.32) and applicable not only to prestressing concrete but to any endeavor that the engineer called upon to undertake: Explain this principlein...

Extracted text: The following principle is taken from Abeles (Ref. 2.32) and applicable not only to prestressing concrete but to any endeavor that the engineer called upon to undertake: Explain this principlein relation to prestress concrete design. 9. We live and learn. (It is always possible to increase one's knowledge and experi- ence.)