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| Category of rooms | The degree of fire resistance of buildings | The number of people on the 1st emergency exit width |
| А and B (А and Б) | I, II, III A | 85 |
| C (В) | I, II, III, III A III Б, IV V | 175 120 85 |
| D(Г) and E(Д) | I, II, III, III A, III Б, IV, V | 260; 180; 130 |
In the literature, and other conditions are regulated to ensure safe evacuation of people in case of fire.
The amount of time required evacuation of people is regulated by SNiP 21-01-97 «Fire safety of buildings and works». For the premises of industrial buildings I, II and III degree of fire resistance, this value is given in Table. 10.3.
Table 10.3
The amount of time required to evacuate people from the industrial buildings
| Category of rooms | The required evacuation time (min) at room volume, thousand m3 | ||||
| До 15 | 30 | 40 | 50 | 60 and more | |
| А and B (А and Б) | 0.50 | 0.75 | 1 | 1.50 | 1.75 |
| C (В) | 1.25 | 2 | 2 | 2.50 | 3 |
| D(Г) and E(Д) | Do not limited | ||||
Removal of gases and smoke from burning buildings are made through window openings, as well as aeration lanterns and special smoke hatches, easily resettable designs. Smoke hatches installed in basements, ceilings in warehouses and industrial buildings. Cross-sectional area is determined by the calculation of smoke hatches.
Easily resettable structures are used for removal of the explosion combustion products in order to reduce the pressure to safe values for the strength and stability of building structures. This is elements of the exterior walls (wall) or roof which can be opened when the pressure inside the building increases. Sectional area of easily resettable structures is also determined by calculation.
Despite the measures taken, in the production at any time, you may need to localize (extinguish) fire.
