12
E/One Grinder Pump Station Ballast Calculations
Sample Calculation, DH272/DR272
C. Subtract the buoyant force from the ballast force to determine the nal condition
Final Condition = Ballast Force - Buoyant Force
= 5973.0 lb – 2165.4 lb
= 3807.6 lb
The approach outlined above may be used to calculate the ballast requirements listed below.
Chart 1
Station
Height (in)
Wetwell
Volume
(cu ft)
FNet-
Buoyant
(lb)
Station
Weight
(lb)
Fballast
(lb)
Volume
Concrete
(cu ft)
Weight
Concrete
in Air (lb)
97 inches 46 2165.4 705 5973 NA NA
129 inches 46 2140.4 730 9438 NA NA
160 inches 46 2100.4 770 14,311 NA NA
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