What are the federal weight limits this tool uses?
The planner uses the standard US federal limits for a 5-axle tractor-trailer: 12,000 lb on the steer axle, 34,000 lb on the drive axle group, and 34,000 lb on the trailer tandem axle group — for a maximum gross vehicle weight of 80,000 lb. Some states and bridges have additional restrictions.
How does the tool decide where to place each pallet?
Heavier pallets are placed toward the mid-front zone over the drive axle area to balance weight distribution across the steer, drive, and tandem axles, keeping each axle group within its federal limit while avoiding overloading any single zone.
Can I import a pallet list instead of entering each one manually?
Yes. The tool supports CSV import/export so you can upload a pallet list in bulk instead of typing each weight individually.