ABSTRACT
For structural design calculations, the design objectives must be translated into quantitative terms called design criteria. For example, the maximum acceptable deflection for a particular beam or slab may be required, or the maximum crack width that can be tolerated in a concrete floor or wall. Also required are minimum numerical values for the strength of individual elements and connections. It is also necessary to identify and quantify appropriate design loads for the structure depending on the probability of their occurrence. Reasonable maximum values are required so that a
suitable compromise is reached between the risk of overload and failure, and the requirement for economical construction.
