Below, you will find a basic calculator for estimating the water tank size that a
pick-up truck can handle. This is only an estimate. This tool may help you choose
a chassis by providing a starting point prior to preparing more refined calculations.
Some things that will affect the accuracy of this calculator include:
Amount of stored items
Tank placement (Will the load add to much weight to one of the axles?)
Use (Will the vehicle be used exclusively on good roads?)
Occupant weights and some storage have been programmed into this calculator. It
is strongly suggested that you consider using the lower end of the range given. The
high end of the range is possible if lightweight materials are used and storage is
kept to a minimum. The pick-up platform storage, occupant weight, hose reels, and
other accessories are a big percentage of the total load placed on the vehicle. Therefore,
it is difficult to estimate accurate water capacity without knowing more about the
unit. It is suggested that you use the REC Detailed Calculator - Pickup Truck Slip
On Units for a more refined estimate.
Remember to weigh the finished vehicle, fully loaded and ready for operation prior
to placing the vehicle into service. Make sure it does not exceed the manufacturer’s
Gross Vehicle Weight Rating or the ratings for either axle.