Atlantic Unity LLC • Nationwide Permit Service
Unlike oversize permits, which are based on a vehicle's dimensions, overweight permits are required when the gross vehicle weight (GVW) or axle weights exceed a state's legal limits.
A permit may be required if your load exceeds:
Gross Vehicle Weight (GVW)
Single Axle Weight
Tandem Axle Weight
Tridem or Quad Axle Weight
Bridge Formula limits
While the federal Interstate System generally allows up to 80,000 lbs GVW, each state has its own overweight regulations, permit fees, and maximum axle weight allowances.
Tandem Axle Permit Weight Limits
One of the most important factors in obtaining an overweight permit is the tandem axle weight. On a standard 5-axle tractor-trailer (18-wheeler), there are two tandem axle groups—the tractor drive tandems and the trailer tandems.
The maximum permitted tandem axle weight varies by state and depends on factors such as:
Axle spacing
Tire size and axle configuration
Bridge Formula requirements
Approved travel route
State-specific regulations
The map below provides a general reference for maximum tandem axle permit weight limits by state. If your requested weight exceeds a state's allowable tandem axle limit, additional axles or specialized heavy-haul equipment may be required.
Disclaimer: This map is provided for informational purposes only. Permit limits and state regulations may change. Always verify current requirements before transporting an overweight load.
Our permit specialists are ready to help you obtain permits quickly and accurately for all 50 states.
Phone
+1 (443) 314-4554
Email
operations@atlanticunity.com
Service Areas
All 50 states • Heavy haul • OSOW permits