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ABSTRACTThe reinforced concrete shell structures are among the most exposed structures to erecting faults and errors, to geometry small miscalculations and concrete pouring. The main source of errors comes from the great differences between their thickness and curvature radiuses of their median surface. Due to these differences all the aspects related to erection of shell structures (such as concrete composition, concrete pouring, formwork stiffness and geometry, etc) affect exponentially the structural quality. Another sensitive feature of shell structures ius the magnitude of the surfaces they cover without intermediate supports. This aspect leads to significant and critical reductions in the structural safety when a small fault or error occurs. The present contribution deals several aspects assocoated to structural assesment and structural rehabilitation techniques from, both, the structural and technological points of view.