The purpose of the structural design is the provision of all the necessary technical elements and guidelines in order to achieve the safe construction of the bearing structure (individual or group of buildings). In particular, it contains the performance of the calculations, the drawings, the charts etc that are needed for the bearing structure construction. In addition, we undertake the accomplishment of earthquake-resistant design of R/C structures, steel structures, composite steel and concrete structures, traditional or listed buildings and monuments, as well as the structural sufficiency study of existing buildings.