The 3 Principles of Flame Retardant Leakage (Leakage Laws)

 

1. Leakage ratio of major leakage elements

Floor:Wall:Window area with leakage gap area equivalent to one fire door (Single Door) ≈ 450:150:50

  - Floor-Average concrete floor area of a fire safety standard fire door = about 450m^2

  - Wall-Average area of fire safety standard fire door = approx. 150m^2

  - Fire safety standard equivalent window (grade 3) area = about 50m^2 (KS fire door equivalent window area = about 30m^2)

2. Leakage path

- Basement floor

  - Ground floor

3. The 3 Main Principles of Leak elements of Smoke control system 

- Principle 1 (Volume flow rate Principle): The air volume of a supply air pressure fire extinguishing system is governed by the number of floors open to fire, the size of the door, and the sum of the leakage area of the smallest leakage element and the parallel leakage elements on the leakage path of each floor. 

  - Principle 2 (Differential Pressure Principle): The differential pressure of a specific leakage element is proportional to the pressure of the maximum static pressure zone in the leakage path to which it belongs, and inversely proportional to the number of series-connected leakage elements in the leakage path and the leakage area of the specific element. 

- Principle 3 (Omission Principle): If the leakage area of the exterior wall of one floor is significantly smaller than the leakage area of one doorway, and the leakage element in the intermediate room of the leakage path with a higher number of leakage elements than the leakage path composed of the lowest number of leakage elements can be omitted.

* Back to Main Procedures : General COMTAM Simulation Procedure for Pressure differential system(Mainly High-rise building) (contamsmulationlab.blogspot.com)