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MAXIMUM WEIGHT LIMITATIONS SUMMARY - page 1 / 4

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MAXIMUM WEIGHT LIMITATIONS SUMMARY

Wisconsin Department of Transportation

On Class "A" Highways[348.15(1)(b)]

SP4075

3/2007

Corresponding Wisconsin Statute numbers in brackets [

].

General Maximum Weight Restrictions: Although there is the possibility of increased weight on a particular wheel or axle or group of axles due to practical operating problems, including, but not limited to, accumulation of snow, ice, mud or dirt, the use of tire chains or minor shifting of load, the following maximum weights include absolutely all weights allowable [348.15(4)]. Class "B" highway weight limitations are 60 per cent of class "A" highway weight limitations [348.16(2)].

Any one wheel or wheels supporting one end of an axle [348.15(3)(a)]...............................................................11,000 Lbs.

* **

Truck Tractor Steering Axle [348.15(3)(b)]................................................................................................ 13,000 Lbs. Single Axle (See Note) [348.15(3)(b)]....................................................................................................... 20,000 Lbs.

Maximum Gross Vehicle Weight of all Axles [348.15(3)(c)].............................................................................. 80,000 Lbs.

*

Truck tractor steering axle may exceed 13,000 lbs. if the manufacturer's rated capacity of the axle and the tires are sufficient to carry the weight, but not to exceed 20,000 lbs. [348.15(3)(b)].

**

21,000 lbs. in the case of a vehicle or combination of vehicles transporting exclusively milk from the point of production to the primary market and the return of dairy supplies and dairy products from such primary market to the farm (not applicable to the National System of Interstate and Defense Highways) [348.15(3)(bg)].

**

21,500 lbs. in the case of a vehicle or combination of vehicles transporting exclusively peeled or unpeeled forest products cut crosswise or exclusively scrap metal (not applicable to the National System of Interstate and Defense Highways) [348.15(3)(br)].

Measuring: The distances between the foremost and rearmost of a group of axles shall be measured between axle centers to the nearest even foot, and when a fraction is exactly one-half foot, the nearest larger whole number shall be used [348.15(5m)]. Note: "Axle" includes all wheels of a vehicle imposing weight on the highway, the centers of which are included between 2 parallel transverse vertical planes less than 42 inches apart, extending across the full width of vehicle and load. Therefore, two axles less than 42 inches apart are considered to be one axle and can carry no more than a single axle [348.01(2)(a)].

"Tandem axle" means any 2 or more consecutive axles whose centers are 42 or more inches apart and which are individually attached to or articulated from, or both, a common attachment to the vehicle including a connecting mechanism designed to equalize the load between axles [348.01(2)(c)].

Any axle of a vehicle or combination of vehicles which does not impose on the highway at least 8% of the gross weight of the vehicle or combination of vehicles may not be counted as an axle [348.15(8)].

Request form SP4370 when hauling under the provisions of 348.15(3)(br), exclusively peeled or unpeeled forest products cut crosswise OR exclusively scrap metal.

Request form SP4415 for the motor vehicle size regulation summary.

Request form SP4416 when hauling under permits issued pursuant to 348.27(9m)(a)1, raw forest and agricultural products.

Request form SP4417 when hauling under the provisions of 348.15(3)(bg), transporting exclusively milk from point of production to primary market and return of dairy supplies and dairy products from such primary market to the farm.

Permits Issued by Division of Motor Vehicles: Most permits for oversize/overweight (O/O) vehicles are issued by the maintenance authority for the class of roadway on which the O/O vehicle proposes to travel. With some exceptions, permits for operation on State, U.S. and Interstate highways are issued by the Permit Unit of the Motor Carrier Services Section of the Division of Motor Vehicles. Applications may be submitted in several ways:

  • *

    Online through a secured extranet application. For information, call 608-266-7320. Once you are enrolled, this application is available to you 24/7. Many permits are automatically analyzed and approved.

    • *

      In person or by overnight mail to WisDOT Permits, 4802 Sheboygan Ave., Room 151, Madison, WI 53705. Office hours are 7:45 a.m. to 4:30 p.m. Monday through Friday.

    • *

      By mail to WisDOT Permits, PO Box 7980, Madison, WI 53707-7980.

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