Giandomenico Toniolo was full professor of Structural Analysis and Design at Politecnico di Milano, Italy. Besides his academic tasks and a professional engagement as structural designer, he carried out a long activity in regulations and standards in Italy and Europe, joining the National Commission for Technical Standards for Constructions and also several committees of the European Committee for Standardization CEN such as CEN/TC250/SC2 for Eurocode 2 (concrete structures), CEN/TC250/SC8 for Eurocode 8 (seismic code), CEN/TC229 for precast concrete products. Within this latter committee he chaired for many years the WG1 on precast concrete structural products. He has been the coordinator of important European research projects on seismic design of concrete precast structures. He has also developed an extensive editorial activity by authoring many scientific works and a number of university textbooks.   Marco di Prisco is full professorof Structural Analysis and Design at Politecnico di Milano, Italy. His research focuses on constitutive modelling for plain and fiber reinforced concrete, theoretical and experimental analysis on reinforcement-concrete interaction and mechanical behaviour of R/C and P/C structural elements. As member of SAG5 Technical Committee for New Model Code, he has been in charge of the chapters on FRC.