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8.6 The total width of the door, emergency exit, and lobby or staircase piece is calculated as follows: 1m for 100 people. However, it is not allowed to be less than: _ 0.8m for the entrance door; _ 1m for the alley; _ 1.4m for the lobby _ 1.05m for the staircase piece.

8.5 The allowable furtherest space calculated from the door of the furtherest room to the nearest emergency exit (exclusive toilet, bathroom) is not allowed greater than: _ 50m for the rooms between two staircases or two exits; 25m for the room only got one staircase or one exit of the utility room; _ 40m for the room between two staircases or two exits; 25m for the room only got one staircase or one exit of public house, tenement house or apartment.

alley to the roof. 1.1The allowable furtherest space calculated from the door of the furtherest room to the nearest emergency exit (exclusive toilet, bathroom) is not allowed greater than: 50m for the rooms between two staircases or two exits; 25m for the room only got one staircase or one exit of the utility room; 40m for the room between two staircases or two exits; 25m for the room only got one staircase or one exit of public house, tenement house or apartment.

1.2The total width of the door, emergency exit, and lobby or staircase piece is calculated as follows: 1m for 100 people. However, it is not allowed to be less than: 0.8m for the entrance door; 1m for the alley; 1.4m for the lobby 1.05m for the staircase piece.

http://tcxdvn.xaydung.gov.vn/tcxdvn/tcxdvn.nsf/857cd5c99dfbb796472570ca006a2fc4/961230030440ae63472570ca004dbd2e?OpenDocument

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