1. 1Assoc. Prof., Dr. of Civil Eng., Dipl. Civil Eng., Technological Educational Institute of Western Greece, Department of Civil Engineering, 1 M. Alexandrou Str., Koukouli, GR-26334 Patras, Greece
2. 2Assoc. Prof., PhD, Civil. Eng., Sohag University, Faculty of Industrial Education, Department of Civil and Architectural Constructions, Sohag 82524, Egypt