Prof. Sérgio A. B. da Fontoura is ISRM Vice-President for South America, and working at the Department of Civil Engineering, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil Ricardo José Rocca is working at the School of Civil Engineering, National University of Cordoba, Cordoba, Argentina José Félix Pavón Mendoza is working at Jose Pavon & Associates, Asuncion, Paraguay.