Nowadays modern architecture demands more transparent building elements. The composite elements allow the best of the characteristics of two different materials to be brought together for a common purpose. This was one of the major reasons for carrying out the presented experimental research. This paper focuses on the analysis of experimental test of timber-glass I-beam on four–point bending tests. The work is being carried out as part of the EU Wood Wisdom-Net research project, with participants from Austria, Brazil, Chile, Germany, Turkey, Sweden and Slovenia.