The goal of my master´s thesis is to devise the support system of the polyfunctional apartment block in Bratislava. The building consists of twelve floors above ground level, while the third last ones are receding and two floors below ground level which serve as an underground garage. The first floor is a polyfunctional unit and other floors above ground level serve for residential purposes. The overall height of above-ground floors is 36,61 metres. This object was considered to the the ultimate limit state and service ability limit state with the valid technical standards by STN. Static calculation is also formed by dynamic analysis of the construction. In the project, I dealt with particular reinforced concrete components such as a flooring plate of a typical floor, reinforced concerete core of the entrance „C“ and selected column in the underground garage. The object is based upon the reinforced concrete slab with the thickness of 1000 mm, which, along with the reinforced concrete walls, constitutes so called „white bathtub“.