Common Formula

Created by Colin Simpson, Modified on Wed, 11 May, 2022 at 5:06 PM by Colin Simpson

TypeFormula
PressureWater Head (Metres) * 0.0981 = Pressure (Bar)
Water Power
100*Litres*Pressure= Water Power(WP)watts
60
Nozzle Discharge
2 d2 √ P= Nozzle Discharge (LPM)
3
Velocity
Distance= Velocity
Time
Jet Reaction
1.57 P d2=Jet Reaction
10
Extinguishers(Area * 0.065)/Rating = Total Extinguishers
Rating 13 = 9 Ltr Water
Rating 34 = 9Kg Dry Powder
CubeWidth * Length * Height = Area (cubed)
SquareWidth * Length = Area (squared)
Circleπ = Area (squared)
No of Persons
Floor Area in meters 2= No of Persons
Occupant Load Factor
Units of Exit Width
No of Persons= No of Units of Exit Width
40 X Time Factor
No of Exits
No of Units+ 1 = Minimum No of Exits
4

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