The Course aims at providing the basic knowledge about modern design techniques of steel and reinforced concrete (r.c.) structures. Linear and nonlinear modelling and analysis techniques and guidelines for the assessment of such constructions are also included, with constant reference to modern probabilistic approaches for the safety and the reliability of structures. Specific attention is paid to the explanation of actual National and International codes for the design of steel and r.c. structures - such as Eurocodes and Italian Standards for Constructions (actual D.M.14.01.2008 and further developments).