The aim of the bachelor thesis is propose a string of reinforced concrete staircase supported by a wall with an opening. It is necessary to design dimensions structure, design and calculate the load bearing reinforcement. Supporting structure I proposed and evaluated in several variants. I decided to process and compare the stringer section height from which I chose the most suitable shape. The work contains two parts and technical management of technological processes of construction and structural analysis. The staircase is designed and complies with the standard STN EN 1992: Design of concrete structures. Computing section was prepared program MathCad 14.0. The settlement of internal forces in the stairwell was designed program Dlubal RSTAB 7.04. The drawings were created with ArchiCAD 13.