Transparent glass staircase landings platforms are one of the load bearing structural components which doesn’t not have established design practice by national our international codes. Experimental tests are practically only option to assess the behavior of glass and to certificate it. Glass may be assumed as isotropic material; mechanical properties do not depend on direction for orientation thus easy for modeling. Main issue once designing staircase landings assumptions of critical stress in particular as tensile and in certain extend bending strength of glass is not a constant value. This stress level depending on glass type, location of load and glass laminate panel compilation. This paper presents assessment of existing design practice in contrary to physical experiments of single glass stair landing plate. In order to perform an optimization task, a different kind of glass samples has been tested in 4-point bending using testing equipment INSTRON 8802. Bending test settings are corresponding to LVS EN 1288-3 standard requirements and based on similar research performed earlier at DTU Netherlands. The results demonstrated that the glass mechanical and physical properties such as Young’s modulus, the Poisson ratio and the density , of the annealed and tempered glass are practically the same nevertheless the bending stress is depend on glass type.