16
E/One Grinder Pump Station Ballast Calculations
Sample Calculation, DH502/DR502
C. Subtract the buoyant force from the ballast force to determine the nal condition
Final Condition = Ballast Force – Buoyant Force
= 12606.0 lb – 4852.1 lb
= 7753.9 lb
The approach outlined above may be used to calculate the ballast requirements listed below.
Chart 2
Station
Height (in)
Wetwell
Volume
(cu ft)
FNet-
Buoyant
(lb)
Station
Weight
(lb)
Fballast
(lb)
Volume
Concrete
(cu ft)
Weight
Concrete
in Air (lb)
104 inches 91.3 4852.1 845 12,606 NA NA
129 inches 91.3 4837.1 860 19,899 NA NA
160 inches 91.3 4806.1 891 28,930 NA NA