The aim of the master's thesis is to design an environmentally advanced gym building. In the first part, the building structure is designed. It is a two-storey building. On the first floor there is a reception, a gym, sanitary facilities for athletes, communication areas, facilities for employees, storage areas and technical facilities. On the second floor there is a cafeteria, gym, sanitary facilities for athletes, tribune, communication areas, toilets, staff facilities and technical facilities. The structural system is a skeleton of monolithic reinforced concrete with infill masonry of aerated concrete. Ceiling structures and staircase are also designed as monolithic reinforced concrete. The building is roofed with trussed steel gable tru...