Regulations on the width of escape routes in fire safety in Vietnam

What are regulations on the width of escape routes in fire safety in Vietnam?

Pursuant to Section G.2 Appendix G National Technical Regulations on Fire Safety for Houses and Constructions issued together with Circular 02/2021/TT-BXD (Expires: January 16, 2023), there are regulations on the width of emergency exits as follows:

1. For public houses

a) The width of an escape route from the hallway to the stairwell as well as the width of the staircase must be determined according to the number of people needing to escape through that exit and the escape rate calculated for 1 meter exit width (door). Depending on the fire resistance level of the house, it is taken not to exceed the following values:

Houses with fire resistance levels I, II: 165 people/m2;

Houses with fire resistance levels III and IV: 115 people/m2;

House with fire resistance level V: 80 people/m2.

b) Calculation of the width of escape routes of schools, boarding schools and school boarding areas, it is necessary to determine the largest number of people simultaneously present on one floor from the number of people. The largest of the classrooms, vocational training rooms and bedrooms as well as sports, conference and lecture halls are located on that floor (see G.3, Table G.9).

c) The width of doors from classrooms with more than 15 students must not be less than 0.9 m.

d) The width of an escape route from rooms without seats for the audience must be determined according to the number of people needing to escape through that exit according to Table G.5, but must not be less than 1.2 m. in rooms that can accommodate more than 50 people.

e) The width of the main escape routes in a commercial room must be no less than:

1.4 m when the commercial area is not larger than 100 m²;

1.6 m when the commercial area is larger than 100 m² and not larger than 150 m²;

2.0 m when the commercial area is larger than 150 m² and not larger than 400 m²;

2.5 m when the commercial area is larger than 400 m².

f) The number of people per 1 m width of the escape route from the stands of outdoor sports and performance facilities is specified in Table G.6.

Table G.5 - Maximum number of people per 1 m width of the escape route of rooms without seats for the audience of public buildings

Table G.6 - Maximum number of people per 1 m width of escape routes from stands of outdoor sports and performance facilities

NOTE: The total number of people escaping through an escape exit must not exceed 1,500 people when the stands have fire resistance levels I and II. When the stand has a fire resistance level of level III, the total number of people passing through must be reduced by 30% and when it is level IV and V, it must be reduced by 50%.

2. For manufacturers

a) The width of an escape route from a room must be determined according to the number of people needing to escape through that exit and the number of people per 1 m width of the escape route as specified in Table G.7, but not less than 0.9 m.

The number of people per 1 m width of an escape route for intermediate values ​​of the volume of the house is determined by linear interpolation.

The number of people per 1 m width of an escape route from rooms with a height greater than 6 m is increased as follows: increased by 20% when the fire protection height of the house is 12 m; increases to 30% when the fire protection height of the house is 18 m and increases to 40% when the fire protection height of the house is 24 m. When the fire protection height of the house is intermediate values, the number of people per 1 m width of an escape route is determined by linear interpolation.

Table G.7 - Maximum number of people per 1 m width of the emergency exit from a production room

b) The width of an escape route from a hallway to the outside or into a stairwell must be determined according to the total number of people needing to escape through that exit and according to the number of people per 1m of the width of the path. Escape routes are specified in Table G.8 but not less than 0.9 m.

Table G.8 - Maximum number of people per 1 m width of the escape route from the manufacturer's corridor

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