Technical Regulations for Glass Structures (TPSK – NN 53/2017) is a comprehensive document which regulates technical properties of glass structures, procedures in the design, construction, maintenance and removal of glass structures and of the structural glass that is part of other loadbearing structures in Croatia. Glass surfaces are commonly continuoulsy supported along edges by a frame. The stiffness of the frame and of the elastic seal between the glass and the frame is influencing the stress in the glass. The conventional calculation model of simply supported plates assumes that the supports cannot move in the vertical direction. Corners of the laterally loaded simply supported plate are stressed since they are not free to lift under the load (wind). This paper has shown that the elasticity of the support has a positive effect on the tension stress of the glass plate. Elastic supports have a double positive role: they reduce tensile stresses on the corners and prevent maximum stresses from moving to the corners where the glass plate has less strenght. A number of different geometries were analyzed for the purpose of establishing the rule, ie defining a formula that predicts the stress relaxation for the non-dimensional load and formula for the maximum tensile stress position with respect to the geometry of the glass plate. For the credible results, elastic characteristics of the material, are taken according to the manufacturer's recommendations for silicone and by experimental test for sealing gum. Tensile stress relaxations are presented through the diagrams for different positions. Many effects have been described and analyzed that are noticed during the analysis. The influence of elastic support was analyzed by parametric analysis, taking into account 3 variables: variable thickness, variable area and variable load of glass plate.