Class of civil defense structure - dual-purpose structure The civil defense structure under construction is a rectangular free-standing, one-story structure buried in the ground with two separate entrances. Overall dimensions in axes 36.9 x 25.2 sq.m. Total area of the shelter - 1,001.37 sq.m. Shelter capacity - 220 people. By type, the civil defense structure belongs to dual-purpose structures with PRU functions (type P-1); by class of consequences (liability) - to SS2. Shelter of students, teachers and school staff is calculated for a continuous stay in the civil defense protective structure, the estimated number of people for 2 days. The school building is provided with an entrance for fire and special transport. The working project provides for measures to create accessibility for people with disabilities and other low-mobility population groups in accordance with DBN V.2.2-40:2018 "Inclusivity of buildings and structures. Basic provisions". From a structural point of view, the structure is a monolithic reinforced concrete frame with load-bearing walls, pylons and coating. The foundation of the reinforced concrete frame is a 400 mm thick slab, monolithic reinforced concrete walls are 400 mm thick, pylons and internal load-bearing walls are 400 mm thick. Ventilation of the building premises is supply and exhaust. The supply air is cleaned with filters. In the bathrooms and showers, an exhaust ventilation system with mechanical drive is installed. The project provides for the installation of electric convectors with an electronic thermostat for heating the premises. The connection to the power supply networks is made from the existing commercial metering unit of the educational institution. All consumers of the shelter belong to category I. A domestic and drinking water supply is designed in the premises of the building. Connection to the Internet network will be provided via a Wi-Fi router. The estimated service life is 100 years.Class of the civil defense structure is a dual-purpose structure The civil defense structure under construction is a rectangular, free-standing, one-story structure buried in the ground with two separate entrances. Overall dimensions in the axes are 36.9 x 25.2 sq.m. The total area of the shelter is 1,001.37 sq.m. The shelter capacity is 220 people. By type, the civil defense structure belongs to dual-purpose structures with PRU functions (type P-1); by consequence (liability) class - to SS2. Sheltering of students, teachers, and school personnel is calculated for a continuous stay in the civil defense protective structure, the estimated number of people for 2 days. The school building is provided with an entrance for fire and special transport. The working project provides for measures to create accessibility for people with disabilities and other low-mobility population groups in accordance with DBN V.2.2-40:2018 "Inclusivity of buildings and structures. Basic provisions". From a structural point of view, the structure is a monolithic reinforced concrete frame with load-bearing walls, pylons, and coating. The foundation of the reinforced concrete frame is a 400 mm thick slab, monolithic reinforced concrete walls are 400 mm thick, pylons and internal load-bearing walls are 400 mm thick. Ventilation of the building premises is supply and exhaust. Supply air is cleaned with filters. In the bathrooms and showers, an exhaust ventilation system with mechanical drive is installed. The project provides for the installation of electric convectors with an electronic thermostat for heating the premises. Connection to the power supply networks is made from the existing commercial metering unit of the educational institution. All consumers of the shelter belong to category I. A domestic and drinking water supply has been designed in the premises of the building. Connection to the Internet network will be provided via a Wi-Fi router. Estimated service life is 100 years.