Staircase Pressurization

The building is with 22 floor and the fire escape stair cases and lift lobby smoke stop lobby are pressurized. The smoke detector shall be located at the entrance of each exit staircase at every storey including the non residential floors. Stair pressurization due to the relative cost of the associated mechanical systems and architectural space issues related to providing exterior balconies and stair vestibules the stair pressurization system is the most widely selected design option.
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Staircase pressurization. At the same time excessive air flow to the staircase must be prevented so that children or less able occupants can open the access door to the staircase during an evacuation. Stairways are fire escape routes nowadays stairwells have better fire ratings than the rest of the building. We are in the process of tc of a pressurization system in our project. In calculating the air supply needed for a pressurization system assumptions have to be made about the leakage characteristics of the building.

Although several types of systems are available for controlling excess pressurisation of the staircase the most commonly used system is the latter. Where pg ii building is provided with a mechanical ventilation system or pressurisation system for its staircase storey shelter an automatic smoke detection system complying with ss cp 10 shall be installed. Norm all the system class must follow the next requirements in all pressurization system. In case of fire in a high rise building a stair pressurization fan spf uses clean outside air to pressurize the air in stairwells.

The pressurized air helps people escape the fire and firefighters battle the fire. Stairwell pressurization systems. The stair case pressurization fan is vfd driven and the fan ramp up down is based on the feedback of the pressure sensors installed in the stair well one sensor in 11 th floor and another in 17 th floor. Chapter 7 mechanical ventilation and smoke control systems 711 general a where air conditioning system is provided in lieu of mechanical ventilation system during emergency all the requirements specified in this code for the mechanical ventilation system shall apply to the air conditioning system.