The axle weights of a loaded rig depend on
two things: (1) empty axle weights,
(2) center of gravity (CG) of payload.
To help balance axle weights
Freight Seesaw estimates (2) based
on pallet pattern and individual pallet weights.
Freight Seesaw assumes freight is centered on each pallet (this is almost always true).
It only takes a few trials to determine which CGs work best for your equipment. (Tip: start with loads that have identical freight on every pallet.) Anytime you haul a heavy load, enter the pallet pattern into Freight Seesaw to calculate its CG. If the drive and trailer axles scale about the same, this is a good number for your rig. If the drive axles scale a lot heavier, it is too low. If the trailer axles scale a lot heavier, it is too high.
Freight Seesaw displays CG in the same units as pallet size. Users outside of North America should use 2 cm instead of 1 inch as the base unit.
For those familiar with physics, a good technical discussion can be found here.
DISCLAIMER. Freight Seesaw is offered as is without any warranties, explicit or implied. The developer will not be held responsible for any damages or failures of any kind associated with its use, including but not limited to: reloads, overweight citations (of any kind), hardware malfunctions, inaccurate data entry, or failure to understand what the app does.
The calculation Freight Seesaw performs is based on time‑tested physical principles discovered by Sir Isaac Newton hundreds of years ago. When used properly it can help avoid returning to the dock for load adjustments (including complete reloads) after scaling.
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