1. Faculty of Mechanical Engineering, Łódź University of Technology, 90-537 Łódź, Poland
2. Department of Steel Structures and Structural Mechanics, Civil Engineering Faculty, Politehnica University Timisoara, 300224 Timisoara, Romania
3. Laboratory of Steel Structures, CCTFA, Romanian Academy—Timisoara Branch, 300223 Timisoara, Romania
4. Technical Science Academy of Romania, 010413 Bucharest, Romania