In an era of new, composite materials and high-strength concrete, and with an increasing demand for sustainable building technologies, the importance of the role of steel in construction is being challenged.. Nonetheless, steel can successfully be used to refurbish and retrofit historical buildings, as well as being a material of choice for new building structures. Steel can effectively be combined with a variety of other materials to obtain structures which are characterized by a high-performance response under different types of static and dynamic activity. The proceedings contains nine keynote lectures from international experts, and is further divided into five sections: calculation models and methods; studies and advances in design codes; steel and mixed building technology; steel under exceptional actions; and steel in remarkable constructions and refurbishment.