Lateral-Torsional Buckling of Steel Beams with Open Cross Section Elastic Critical Moment Study and Software Application Master of Science Thesis in the Master’s Programme Structural Engineering and Building Technology HERMANN ÞÓR HAUKSSON JÓN BJÖRN VILHJÁLMSSON Department of Civil and Environmental Engineering Division of Structural Engineering Steel and Timber Structures CHALMERS UNIVERSITY OF TECHNOLOGY Göteborg, Sweden 2014 Master’s Thesis 2014:28