The aim of the thesis the design of a steel structure used to cover two tennis courts, with provided space for additional content like locker rooms, sanitary facilities, offices etc. The paper is divided into two parts. The first part describes the basics and features of sports facilities with examples of those buildings in the Republic of Croatia. The second part shows the architectural solution of the building in which the courts are covered by a steel hall, 37,2 x 36,9 m layout dimensions, 10,3 m high at the ridge with a roof pitch of 12°, while the additional contents are separated with a masonry construction. The design of the main and secondary structural elements as well as the design of the foundations of the steel hall has also been done. A portal frame is used as the bearing system of the hall. The columns are made from steel HEB sections while the beams are made from HEA sections reinforced with haunches. The purlins are made from HEA sections and are additionally supported with steel wires. The bracing system comprises of transverse and longitudinal roof bracing as well as wall bracing elements made from rectangular hollow sections. All elements are made from S355 steel and are designed according to the valid HRN EN norms. The structural analysis was performed on planar and spatial models using the SCIA Engineer software package while the design check of joints was performed using the IDEAStatica software package.