Wyoming Highway Patrol
road

Legal Sizes and Weights

Legal Size Limits

 

Width:               8'6"
Height:              14'
Length:             60' - Single unit, or semi-trailer in a truck tractor, semi-trailer combination.
81' - semi-trailer, trailer, or double semi-trailer combined length in a truck-tractor and semi-trailer, trailer, or double semi-trailer combination including the connecting mechanism.
48’ - semi-trailer.
40’ - trailer or second semi-trailer.
For consecutive towed vehicles, if the weight difference between the vehicles exceeds 5,000 pounds, the heavier towed vehicle shall be directly behind the truck-tractor and the lighter towed vehicle shall be last.
85' - Any combination of vehicles other than those listed above.
 
No combination listed above shall consist of more than 3 single vehicles.    
 
97' - For saddle mount combinations consisting of no more than 3 saddle mounts.  Additional vehicles may be transported when safely loaded on the frame of a vehicle in a properly assembled saddle mount combination.

Legal Weight Limits

 

All Highway:
Single Axle: 20,000 lbs.
Tandem Axle: 36,000 lbs.
Triple Axle: 42,000 lbs.
Each Wheel: 10,000 lbs.
Each Tire:
Steering: 750 lbs./inch of tire width
Other Tires: 600 lbs./inch of tire width
 
Gross Weight Interstate: 117,000 lbs. - All axle groups must comply with Gross Weight Table I below
Gross Weight Primary & Secondary at the operator’s discretion:
80,000 lbs. - Must comply with Gross Weight Table II below; or
117,000 lbs. - All axle groups must comply with Gross Weight Table I below

Laws Governing Size, Weight and Permits

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