Stability of megalithic structures against overturning

When restoration works are carried out on a megalithic monument, the study of the structure's stability is always a significant task. In this paper, the overturning stability problem regarding megalithic structures is presented. Classical and advanced theories are implemented in a computer program to obtain the orthostat's overturning safety factor. Two examples of application concerning polylithic and monolithic structures are explained. These cases show the capabilities of this code to deal with current orthostat stability problems. Moreover, the program is able to support simulations on constructive processes and methods of erection or even to study the possible orthostat breakage causes. This information can contribute to a better knowledge of ancient constructional technology, which is directly connected with the cultural heritage of prehistoric societies.