Stair Pressurization Systems

Stairways pressurization system help prevent smoke from entering the fire ladders in all businesses.

LADDER PRESSURE SYSTEMS


Stair pressurization systems are aimed at providing safe access to fire crews to fire crews by ensuring that smoke escaping from fire escapes is avoided in all enterprises and human evacuation is provided in a smokeless environment. Pressurization of escape stairways is a common and low cost method.

Pressurization of escape stairways is a common and low cost method. In this view, entry of the smoke into the escape ladder of the fire is prevented.
 

In order for the pressurization system to be effective, the following three calculations must be made:

1. When the pressurization system is operating, the pressure difference between the pressurized stairwell and the building use areas must be at least 50 Pa when all doors are closed.

2. The pressure difference for the open door condition must be at least 15 Pa.

3. During the fire intervention, the pressurisation system must be able to provide sufficient air velocity to prevent smoke entry into the pressurized area from an open door. The air speed is provided for two consecutive gates and for the exit door to be fully open. The average speed magnitude should be at least 1 m / s for the fully open state of each door.

 

In order for the pressurization system to be effective, the following three calculations must be made:

1. When the pressurization system is operating, the pressure difference between the pressurized stairwell and the building use areas must be at least 50 Pa when all doors are closed.

2. The pressure difference for the open door condition must be at least 15 Pa..

3. During the fire intervention, the pressurisation system must be able to provide sufficient air velocity to prevent smoke entry into the pressurized area from an open door. The air speed is provided for two consecutive gates and for the exit door to be fully open. The average speed magnitude should be at least 1 m / s for the fully open state of each door.