Building – with supporting longitudinal walls of complete brick and limestone with a thickness of 50 cm, foundations and basement walls – tape from a botobin with a thickness of 50 cm. The distance between the load -bearing walls of 6.3 in the middle part and 6 m in risalites, the ceiling – from reinforced concrete round -the -empty plates. The building is provided by all types of engineering equipment. During the reconstruction, an increase in a useful area by 800-900 m2, t,. e. almost double compared to the existing building. To solve this problem, it was proposed to add to the middle part of the building, increasing its number of storeys to 5. The width of the superstructure in the axes took 15.1, the total length is 24.5 m.
The main entrance to the superstructure is designed through an extended central staircase of the existing building. An additional operational inner staircase is located at the eastern end of the superstructure with the exit to the operated roof of the existing building. The opposite end of the superstructure on the 3rd floor provides a conference room, the second exit from which is also organized on the operated roof of the Western risalitis of the existing building. Evacuation from operated roofs is provided through an attached open staircase. The main element of the main facade is the portico formed due to the external placement of the support supports. The conjunction of the division of the superstructure facades and the existing building is provided by compliance with the rhythm of the window openings of the existing building and the supporting columns of the superstructure. With a partial superstructure of buildings built in the last century, which have separate elements of the order system on their facades, there is no need to repeat all the stylistic details of the old building in the superstructure. To create architectural unity, it is necessary to observe the proportional unity of the divisions of two buildings, the rhythm of architectural plasticity and the degree of elaboration of individual architectural details. This creates stylistic unity without complete copying of details.