ADC
Fire Water Tank Calculations
(Design Development Stage)
(192-ZAYA-SA)
(192-ZAYA LIVING-SA)
FEBRUARY 2023
Rev "00"
Water Tank Calculations
(192‐Zaya Living‐SA)
Rev 0
FEBRUARY 2023
1. Fire Water Demand
As the fire system used over the building is a combined system,
so, the building is protected by both automatic sprinklers and fire cabinet.
And as per the NFPA13 fire code the minimum water flow needed for (Light Hazard Building) is
500 GPM,
Flow rate needed for
sprinklers with an operation area of 1500 FT2 = 225 GPM
And the Flow rate needed for
one cabinet running with the sprinklers = 250 GPM
Hence, Total GPM needed = 475 GPM ≂ 500 GPM to be found at local Catalogues.
Project consists of 5 building each building need 500 GPM so the total Flow not exceed
1250 GPM
Selected running time will be 60 minutes using (NFPA 13, Table 19.3.2.1)
Water Tank Calculations
(192‐Zaya‐SA)
Rev 0
FEBRUARY 2023
Rev 00
2
Hence,
Firewater demand = 1250 * 60 = 75000 gallons.
Firewater demand = 283.9 Cubic meter.
Conclusion
‐
The required Fire water tank volume is 283.9 cubic meter with two compartments. The
clear dimensions for is (23mX5.1mX2.95m), height of 2.3m filled with water and 0.70m
for vent.
Water Tank Calculations
(192‐Zaya‐SA)
Rev 0
FEBRUARY 2023
Rev 00
3