The width of horizontal escape routes is calculated in proportion to the number of people who can stay on a given floor of the building at the same time, assuming at least 0.6 me and 100 people but not less than 1.4 m. It is allowed to reduce this width to 1.2 m, if a given escape route is intended for evacuation, no more than 20 people. The leaves of the doors constituting the exits to the escape route may not, when fully opened, reduce the required width of that route. The height of the escape route should be at least 2.2 m, with the admission of local decreases up to 2.0 m on sections no longer than 1.5 m.
For buildings containing rooms, which purpose and method of management do not clearly indicate the maximum number of their users, the number of people for the needs of calculations related to the evacuation should be taken on the basis of the usable floor area index, amount for administration and office spaces 5 m2 / person, and for lobbies and conference rooms 1 m2 / person.

The section of the escape route from the exit from the room onto this path to the exit outside the building, to another fire zone or to an enclosed staircase, closed with a door with a fire resistance class of at least El 30, equipped with devices to prevent fuming or to remove smoke, it is called an emergency exit. The length of the escape route is measured along the axis of the escape route. In the event of the end of the escape route with a fire-proof vestibule, this length is measured to the first door of this vestibule. The permissible length of escape routes in a fire zone depends on its ZL category and the number of escape routes for individual rooms.. In the case when the room has two escape routes, and these passages do not overlap or cross, the maximum length of the shortest handle is specified, and for the second approach, a length greater than it is allowed 100%.

Corridors constituting an escape route in the ZL fire zone, with no technical and construction solutions protecting against smoke, should be divided into sections no longer than 50 m, by means of partitions with smoke-tight doors or other devices to prevent the spread of smoke. Partitions that divide the corridors, above suspended ceilings and under floors raised above the level of the ceiling or the ground, should be made of non-flammable materials.

In the case of an escape route to the exit outside the building from the staircase, possibly from horizontal general communication routes through the hall, which can also fulfill the functions complementary to the functions resulting from the purpose of the building, such as: reception desk, building security, small sale, the following conditions should be met:
– an evacuation route from only one staircase may be led through one hall, unless the cage has a separate one, not leading through this hall, Emergency exit;
– the lobby should be separated from horizontal general communication routes yes, as required for a staircase in a given building;
– the free width of the escape route in the hall should be at least greater 50% from the required horizontal width of the escape route, leading to this exit outside the building, and determined on the basis of the largest anticipated number of people staying on one floor of the building at the same time, and its height should be at least 3.3 m;
– the width of the exit door from the hall to the outside of the building should be approx 50% greater than the minimum width of the exit door for a given type of building.
In the high and high-rise building there should be at least two staircases enclosed and separated from the horizontal routes of general communication, rooms and cellars with a fire-proof vestibule. The exception is a tall building with a floor plan not exceeding 750 m2, where only one staircase is allowed. Internal walls and ceilings forming the housing of the staircase or ramp running within more than one fire zone, should have a fire resistance class compliant with the requirements of the fire resistance class for ceilings in a given building.
In a high-rise building of the ZL I category, ZL III and ZL V, staircases and fire lobbies constituting an escape route, should be equipped with devices preventing their smoke, while in a tall building of the same ZL categories, alternatively to anti-smoke devices, the use of automatic smoke exhaust devices activated by a smoke detection system is allowed.
In high-rise and high-rise buildings, ZL I, ZL III and ZL V, with a usable floor at the height above 25 m, at least one crane in each fire zone should be adapted to the needs of rescue teams. This means the load capacity requirement at least 1000 kg and horizontal dimensions of the cabin not less than 1.1 x 2.1 m, which enables the evacuation of the wounded on a stretcher. A landing before entering such a lift should be accessible from the staircase fire vestibule. It is allowed to enter the lift from the hall, if it is closed in the event of fire with a door with a fire resistance class of at least El. The walls and ceilings of the crane for rescue teams should have the fire resistance class required for the ceilings in a given building, and the elevator door should be fire-resistant (He) not less than half of the fire resistance class required for the walls and ceilings of the shaft, unless the lift is accessed through a fire porch. The lift shaft for rescue teams should be equipped with devices to prevent fuming or to remove smoke.