Motor Carrier Height and Weight Restrictions

Height and Weight

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WEIGHT ENFORCEMENT PROGRAM

LEGAL SIZE RESTRICTION (including load)


Total length (including bumpers and load overhang) - Single Motor Vehicles

40 feet

COMBINATIONS ON NATIONAL TRUCK NETWORK AND APPROVED ACCESS ROUTES
(Interstates and certain designated primary highways)
Truck Tractor and 53' or shorter trailer - No Length Limit - Maximum Width8 ½ feet (41 feet max. - King pin to center of rear axle group)
Truck Tractor and Two Twin Trailers - No Length Limit - Maximum Width8 ½ feet (trailer lengths 28 ½ feet maximum)
Conventional 5th Wheel and Automobile transporters (plus overhang)65 feet (Overhang; front - 3 feet, rear - 4 feet)
Note: Trailer Length does not include refrigeration equipment or airfoil devices (bubbles).

ALL HIGHWAYS GENERAL WIDTH RESTRICTIONS
(excluding mirrors and sunshades)
Overall Width8 feet Truck Tractor and 53' or shorter trailer - No Length Limit - Maximum Width - 8 feet (41 feet max. - King pin to center of rear axle group)
Single Trailer Household Goods carriers53' or shorter trailer - Maximum Width - 8 ½ feet
Truck Tractor / single twin trailer (trailer length - 28 ½ feet Maximum) Maximum Width8 ½ feet
Nondivisible loads on highways having a roadway width of 20 feet or more8 ½ feet

GENERAL LENGTH RESTRICTIONS
Stinger Steered Automobile Transporters and Saddle Mounts (plus overhang)75 feet (Overhang: front - 3 feet, rear - 4 feet)
Conventional 5th Wheel Automobile Transporters (including overhang)65 feet (Overhang: front - 3 feet, rear - 6 feet)
Maximum length of a nondivisible load carried on a combination of vehicles70 feet (No overall length limit for the combination)

HEIGHT RESTRICTIONS
Overall Height13 ½ feet

LOAD OVERHANG RESTRICTIONS
(excluding mirrors and sunshades)
The extension of a load beyond the extremities of the vehicle can't exceed the measurements listed below:
Front3 feet
Rear6 feet
This may be exceeded for combinations carrying nondivisible loads not exceeding 70 feet (length of load).

LEGAL WHEEL, AXLE & GROSS VEHICLE WEIGHTS WEIGHT PER WHEEL
The maximum weight per inch of width of tire is 800 pounds on any one wheel. Tire manufacturers' rated width is used in calculations; thus a 9.00-23 tire has a nine-inch width.
Axle Weights for Trucks and Combinations Registered in Classes 1 through 20 (less than 73,280 pounds), may not exceed the lesser of the GAWR or the following weights:
The axle weight upon the steering axle may not exceed 20,000 pounds.
If the Center-to- Center Distance Maximum Axle Weight in Pounds upon
Between Two AdjacentOne of Two AdjacentOther of Two Axle Axles Adjacent Axles
6feet18,00018,000
6 to 8 feet18,00022,400
Over 8 feet22,40022,400
NOTE: Exceptions to this table are three-axle trucks in class 17, which are allowed 21,400 pounds on each tandem axle and four-axle trucks registered in class 20 which are allowed 21,400 pounds on any tandem axle with the group of three tandem axles limited to 60,000 pounds. These exceptions do not apply when the trucks are traveling on Interstate highways.