Staircases and Lift Pressurization Systems

Smoke arisen during a fire in the buildings has the tendency to go towards staircases, lift spaces and other vertical shafts by the impact of the factors such as thermal expansion, natural convection and chimney effect. The smoke expanded to the building prevents fire fighters to tackle and disallows people to escape safely. Pressurization Systems are one of the most efficient methods to solve this problem. Using Pressurization Systems got prevalent in order to protect the staircase gaps of the high buildings from the smoke in the 1960s.

Pressurization Systems are designed to create high pressure by mechanical ventilation in order to prevent the access of the smoke in the staircases, lift gaps and vertical shafts and also restrict the smoke in the area that the fire started and extract the smoke from the fire area. Thus, Pressurization Systems prevent smoke to diffuse whole car park and provide fire escapes to be smoke free in order to allow people to escape safely. Also, it helps fire fighters access to the source of fire to tackle.

The standards that define Pressurization Systems Requirements can be generally aligned as following;

  • BS EN 12101-6:2015
  • NFPA 92 A
  • AS/NZS 1668.1

The pressurization difference between pressurized volume and living space in the standards and regulations is determined for the situation in which all doors are closed except the defined doors. Moreover, the required air velocity rate is defined as other criteria for the situation of open door. Maximum value of the required force in order to open the doors is restricted by the relevant article in the standards and regulations.

VENCO prioritizes developing Pressurization Systems Products. Moreover, we attach a great importance to give a correct engineering service by evaluating each Pressurization Systems Project based on its criteria in order to establish the most efficient system.