Frameless arched coverings are one of the varieties of prefabricated structures for various needs: sports facilities, hangars for various equipment, warehouses for vegetable storage, etc. They are economical compared to other structures, since due to their light weight they do not require massive foundations, compared to frame and wall structures and can be laid with a small depth, which in turn saves on land work. Due to this, they arouse interest in their design and in the development of structural improvements, especially for conditions with a sharply continental climate with high precipitation and strong winds. In this paper, frameless arched coverings made of U-shaped profiles were considered, depending on the span of the coating and on the method of insulation for the sharply continental climate of the Republic of Khakassia. As a result, we have received that constructive solutions are required to strengthen these coatings for large spans, for example 15, 20 and 25 meters, or measures to reduce the snow load on the coating.

Keywords: frameless arched coverings, U-shaped arched profile, sharply continental climate of the Republic of Khakassia, polyurethane foam, mineral wool

The reconstruction of the basement of a two-story brick building is considered. The reconstruction of the basement was preceded by a technical inspection of structures and elements, which revealed damage. The condition of the basement structures was assessed, the causes of damage were identified, and a project was developed to eliminate them. The main tasks of the reconstruction included: eliminating the facts of flooding by waterproofing the walls and floor of the basement, developing a recipe for dry mix for shotcrete, eliminating the identified damage and reconstructing the basement walls.

Keywords: basement, flooding, water resistance, strength of concrete under compression, cement, silica fume, organo-mineral complex additive

A survey of the frame-panel building was carried out, in which ecowool was used as the heat-insulating material. A study was made of the moisture state of wooden frame walls and attic floors. Ecowool samples were taken from various sections of the wall. No mold was detected on material samples. In this case, the sorption humidity was not more than 16%. The results of laboratory tests of ecowool showed high persistence of density and coefficient of thermal conductivity during long-term operation. Tests were conducted to determine the effect of moisture on the change in the physical and technical properties of ecowool. The research results were processed by statistical methods. As a result of the study, it was found that moisture does not accumulate in the ecowool layer of the examined frame walls and attic flooring, but goes out through the insulation and elements of the building envelope. The conducted studies allow us to predict the preservation of the heat-shielding properties of ecowool during operation for a long time

Keywords: ecowool, durability, sorption humidity, density, coefficient of thermal conductivity