Requirements for smoke exhaust skylight

The general smoke skylight building height will consist of a public building and building 50m 100m more than the height of residential buildings, usually in the dialect on the external walls of the stair and elevator in front of room fire and common antechamber installation, and the use of natural fire smoke skylight way is the most suitable.
The window area of the natural fire protection, fire control and smoke exhausting skylight skylight shall meet the following requirements:
1, smoke proof staircase flash room, fire elevator in front of room can be opened outside the window area should not be less than 2.00m;
2, common antechamber should not be less than 3.00m, on the stairwell every five layers can be opened outside the window of the total area and the exterior wall should not be less than 2.00m;
3, the length of not more than 60m of the aisle can open the window area should not be less than 2% of the aisle area;
4, the need for fire protection and smoke exhaust skylight skylight room can open the window area should not be less than 2% of the area of the room;
5, the clearance height is less than 12m of the atrium can open the skylight or high side window area should not be less than 5% of the area of the atrium.