This Master thesis was about calculation and design of supporting steel bar structure multi storey administrative building. Steel structure with rotation symmetric floor plan has sixteen storey. Maximal size of building is 100x100m. Structural design report is made by a combination of manual calculations and calculations using software RFEM by Dlubal. Structural design report includes calculations of secondary beam, primary beam, column, bracing, purin, truss girder and others part of structure with their connections. Thesis includes drawing documentation and report.

The subject of this master’s thesis is the design and calculation of a five-floor multifunctional building. The building consists of flats located in floors -1 to 3, the remaining underground floors serving as a car park and the second part of the building contains spaces designated for business purposes. Each of the two flats located on each floor features a balcony. The multifunctional building contains two underground floors which are designed entirely as reinforced concrete structures and three aboveground floors designed as ceramic brickwork structure. The roof of the building is flat, not designed for walking and featuring an air conditioning unit for the entire building. A review of selected loadbearing structures of component floors was performed as a part of this thesis. The main load-bearing horizontal is composed of stiff ceilings, including the bordering ceiling of the third floor and the roof. Above-ground floors are to be constructed of pre-stretched ceiling girders Spiroll which are set onto reinforcing wreaths. Underground floors are to be constructed as a monolithic structure made of ferroconcrete. The vertical structure is constructed of perforated brick blocks for above-ground floors comprising floors 1-3, remaining underground walls are constructed of monolithic ferroconcrete. Foundation constructions are made of monolithic concrete white tub including confluence and review of the tub.