Abstract—This paper deals with experimental research of stability behaviour of laminated structural glass beams. The purpose of the research is the evaluation of lateral-torsional buckling resistance and actual behaviour of the beams due to absence of standards for design of glass load-bearing structures. The experimental research follows the previous one focusing on measuring of initial geometrical imperfections of glass members and experimental evaluation of flexural buckling resistance of structural glass columns. Within the frame of the research 9 specimens were tested. Experiment results were compared with analytical analysis and numerical analysis based on finite element method using initial imperfections resulted from Southwell's plot. The goal of the research is to develop buckling curve parameters to simple calculation of buckling resistance.