General information.

The secondary school was built according to standard design 222 – 1 – 193/75. “Secondary school for 30 classes (1176 students).” The external walls are made of expanded clay concrete panels according to the II-04-5 series. 1. The main building of the secondary school is three-story with a basement. Year of construction – 1987. The extensions to the secondary school building are one-story without basements. Year of construction – 1991. Service life as of the date of technical inspection – 31 years. One-story extensions without basements to the building of a secondary school have the shape of rectangular trapezoids in plan. The height configuration of the research object is rectangular. The structural type of the building is frame, with a clear division of structures according to their functions - load-bearing and enclosing. A spatial system (frame), consisting of columns, beams, crossbars and other elements, together with the floors in this case, absorbs all the loads acting on the building. The premises are protected from the external environment by external walls. According to the material: reinforced concrete frame from prefabricated structures of factory production according to Series II - 04. According to the arrangement of horizontal connections: with longitudinal and transverse arrangement of crossbars. By the nature of static work: communication. The spatial rigidity of the building is ensured by the operation of the floors as unchangeable disks (in the horizontal plane) and rigidity diaphragms (in the vertical plane). By number of storeys: low-rise frame. By size of spans: with small spans (up to 6 m), and with medium spans (6 - 12 m). According to the type of horizontal load-bearing structures: transom (beam) frame. The structural design of the prefabricated reinforced concrete frame of the studied three-story building with a basement of a secondary school is different in plan: The reinforced concrete braced prefabricated frame of the building of a secondary school is made with a grid of columns 6,0 x 6,0 m and 6,0 x 3,0 m. Sports premises halls, assembly hall, located in the grid of alignment axes 1–6/В–К are covered with a prefabricated reinforced concrete flooring consisting of ribbed slabs, with a span of 12,0 m. In the main building of the secondary school on the first, second and third floors, the floors are designed in height on the same level. In the main building of the secondary school in the basement, the floors are designed at different heights. There are internal concrete steps for communication between the basement rooms.