Assessment constitutes the last and the most important step of a laborious procedure towards the formation of the scheme of structural restoration. Diagnosis and quantitative safety evaluation are the basic pylons for assessment. A basic question that arises at the stage is regarding the estimate of the residual capacity of the structure, in other words, how close the structure is to local or general collapse. Diagnosis constitutes an effective tool for the choice of the proper structural model and relevant loading cases for the structural analysis and safety evaluation. The crack pattern that is predicted for the combination of gravity loads with frequent earthquake constitutes a crucial checking of the reliability of the safety evaluation. In fact, if the resulting crack pattern coincides more or less with the surveyed crack pattern, there is a high probability that the analysis and design at near-collapse limit state will give reliable results.