When the scissors staircase is not common antechamber staircase must set the pressurized system?
Scissors, staircases should be smoke staircase.6.1.2.2 scissors should be provided with a fire barrier not less than 1.00h in the ladder section of the stairs.6.1.2.3 should be set up in front of scissors stairs. The tower houses there are difficulties can set up a room, but two staircases should be respectively pressurized air supply system.
This house is to the smoke prevention staircases, room area of 4.5 square meters, whether you need to see the positive pressure air, room can natural smoke, if not, is in need of positive pressure ventilation; evacuation stairs if natural ventilation, without positive pressure ventilation.
A high-rise building with more than thirty-two storeys, and the air supply system and the air supply shall be designed separately.8.3.4 scissors, staircases can be used in conjunction with an air duct, the air flow should be calculated according to the volume of two staircases, the air outlet should be set separately.So, of course, scissors ladder can be done, but you should consider why scissors ladder, huh, huh?.
