The main goal of the diploma thesis was to verify the suitability of using beech plywood as an alternative composite material for the production of self-supporting stairs, made from grown beech wood. Beech plywood was selected due to the required strength and rigidity of the construction material. The aim of the work was to test selected physical and mechanical predicates of plywood: flexural strength, modulus of elasticity in bending, Tension per pendicular to the plane of the board, swelling and absorbency. After performing the tests, comparing with the data given by the manufacturer of a particular board and given by other manufacturers, we evaluated the possibility of it suse in a self-supporting staircase. The work consists of theoretical, practical and final part. The first part focuses on obtaining theoretical background on the issue of stairs and their division, on beech plywood and its composition and properties. The second part, research, was performed in the development workshops of the Technica University in Zvolen. Second part is focused on the goal of work, the methodology of the tests that we performed and obtained results from it. In the last part are the results compiled in discussion and conclusion.