1. Rector Emeritus, Head of Dept. of Building Structures, Faculty of Civil Engineering, Czech Technical Univ. in Prague, Thakurova 7, Prague 6, 166 29, Czech Republic. E-mail: witzany@fsv.cvut.cz
2. Lecturer, Dept. of Building Structures, Faculty of Civil Engineering, Czech Technical Univ. in Prague, Thakurova 7, Prague 6, 166 29, Czech Republic. E-mail: cejka@fsv.cvut.cz
3. Lecturer, Dept. of Building Structures, Faculty of Civil Engineering, Czech Technical Univ. in Prague, Thakurova 7, Prague 6, 166 29, Czech Republic. E-mail: zigler@fsv.cvut.cz