Modern structures can achieve good performancesunder earthquake loading through the so-called ductiledesign that offers high dissipation behaviour without sig-nificant loss of strength.However, the adoption of steel–concrete compositesolutions in design practice, which is convenient fromboth a structural and a construction viewpoint with re-spect to steel structures, has to date been precluded bythe lack of suitable construction solutions. In fact, Euro-code 8 [1] sets general principles for designing earth-quake resistant composite structures and imposesprecise constructional and performance rules; but it doesnot furnish adequate information on the associated