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Permittable Vehicle Dimensions and Weight Tables

Over-Dimension Vehicles

Any vehicle that exceeds legal vehicle dimensions and weight must get an over-dimension permit. Order an over-dimension permit through our Oregon Routing Information Online (ORION) self-service permitting system. ORION provides access to both single trip permits and annual permits. For more information about the new system, training resources and instructions on how to establish your account, please visit the ORION Project page.

How to Use Oregon Routing Information Online (ORION)

Use the ORION Vehicle Upload Spreadsheet to upload multiple vehicles at one time in ORION. Select Vehicle Import from the Administrative Panel. While other formats will work if you designate where to find the information, this format is aligned to the default ordering in ORION.

Training Materials

We encourage all carriers to review these materials in advance of using ORION to create your account and order permits.

Key topics include:
  • Creating your account in ORION.
  • User management.
  • Uploading vehicles for use in ORION.
  • Ordering Annual and Single Trip Permits.
  • Navigating the permit queue.
  • Payment options.
  • Permit status and other search functionality.
  • Pre-trip planning and route reviews.
  • RUAF Refunds.
Training Materials and Videos

Types of Over-Dimension Loads

The motor carrier and driver are responsible and liable for any and all injury to persons or damage to property and all damage to or destruction of any highway or any highway structure resulting from the oversize or overweight movement.

Overheight

Motor carriers moving loads that exceed 14 feet high are required to obtain an over-dimension permit and are subject to special requirements and responsibilities. Note: Overheight may not be caused by items loaded in multiples (stacked or overlapped).
Overheight Movement Requirements
Motor carriers with a single trip over-dimension permit for a load over 14 feet 6 inches high must meet one of two requirements:
  1. Use a pilot car escort with an overheight pole in front of the high load throughout the trip.
  2. Have a signed declaration form on file with CCD acknowledging that the carrier is responsible for any injury to persons, damage to property or damage to any highway or highway structure resulting from an overheight movement under the permit.
    o The declaration option is only available to motor carriers that have established accounts with CCD.
    o The declaration form must be signed by the individual owner, a partner, a corporate officer, a partner in an LLP, a manager/member of the LLC or agent.
    o Declaration Form 735-9929 filed for Attachment 75A — Mobile Homes / Modular Units.
    o Declaration Form 735-9930 filed for Attachment 82A — Non-Divisible Loads.
Motor Carrier and Driver Responsibilities
  • Responsible for determining adequate clearance, both vertical and horizontal, for movement under this permit.
  • Must notify the Over-Dimension Permit Unit within 24 hours of an accident involving striking a structure in the course of a movement.

Overwidth

Motor Carriers moving loads that exceed 8 feet 6 inches in width are required to obtain an over-dimension permit and are subject to special requirements and responsibilities.

Travel restrictions and exceptions will be described on the permit attachments apply to all overwidth moves authorized by either an annual or single trip permit.
Oregon Administrative Rules
OAR Division 70 — Vehicle Weight and Dimension Limits.
OAR Division 75 — Movement of Over-Dimension Mobile Homes and Modular Building.
OAR Division 82 — Variance Permits Issued for Non-Divisible Loads.

Overweight

Weight can be a factor in the permitting process depending on the size of the load. Please see the Weight Tables Explained section below to determine your legal and permittable weights.

The tire size and weight chart on our Legal Vehicle Dimensions web page will help you determine the maximum allowable weight for your vehicle.

Overweight loads, even those that qualify for extended weight with legal single, tandem and group axle weights, are prohibited from crossing certain weight restricted bridges in Oregon. Please see the Route Map 8 List for information regarding specific bridges. For more information about approved routes, please visit our Oregon Route Maps web page.

Weight Tables Explained

Oregon uses weight tables to determine legal and permittable weights. Motor carriers can also use our Online Weight Calculator.
Weight Table 1 — Legal Weight, No Permit Required
Use form 8110 for trucks with legal axle weights hauling divisible loads.
Maximum Weight Allowed
Common Vehicle Types
  • 600 pounds per inch of tire width.
  • 20,000 pounds single axle.
  • 34,000 pounds tandem.
  • 80,000 pounds gross weight.
  • Solo truck.
  • Truck-tractor and semitrailer.
  • Truck and trailer.
  • Log truck and pole trailer.
Weight Table 2 — Extended Weight, Permit Required
Use form 8111 for trucks with legal axle weights hauling divisible loads.
Maximum Weight Allowed
Common Vehicle Types
Between 80,000 pounds and 105,500 pounds.


  • Truck-tractor-semitrailer-trailer (aka doubles).
  • Triple-trailer combinations.
  • Truck-tractor and semitrailer.
Weight Table 3 — Heavy Haul Weight, Permit Required
Use form 8112 for trucks with heavy haul / non-legal axle weights hauling a non-divisible load.
Maximum Weight Allowed
Common Vehicle Types
  • Single Trip Permit is based on the number of axles and wheelbase.
  • Annual Continuous Operation Permits allows up to 98,000 pounds for non-divisible loads.
  • 600 pounds per inch of tire width.
  • 21,500 pounds per single axle.
  • 43,000 pounds per tandem axle, the weight shown on the over-dimension permit and the sum of the permittable axle, tandem axle, or group axle weight, whichever is less.
  • Truck-tractor-lowbed semitrailer.
  • Truck-tractor-semitrailer and booster.



Weight Table 4 — Heavy Haul Weight, Permit Required
Use form 8113 for trucks with heavy haul/non-legal axle weights hauling a non-divisible load. Table 4 allows for more weight using a shorter wheelbase than that authorized by Table 3.
Maximum Weight Allowed
Common Vehicle Types
  • Based on the number of axles and wheelbase.
  • 600 pounds per inch of tire width.
  • 21,500 pounds per single axle.
  • 43,000 pounds per tandem axle, the weight shown on the over-dimension permit and the sum of the permittable axle, tandem axle, or group axle weight, whichever is less.
  • Self-propelled crane.
  • Truck-tractor-lowbed semitrailer.
  • Truck-tractor with jeep and semitrailer.
  • Truck-tractor with semitrailer and booster.
Weight Table 5 — Heavy Haul Weight, Permit Required
Use form 8114 for specific vehicle configurations only. Weight Table 5 and its formulas for increased weights is more complex than the other tables and requires special analysis by the Over-Dimension Permit Unit.
Maximum Weight Allowed
Common Vehicle Types
  • Up to 48,000 pounds per tandem axle may be allowed if the combination of vehicles has at least 9 axle with a steer axle followed by four consecutive tandem axles which are 8 foot wide (standard).
  • Truck-tractor with jeep, semitrailer and booster.

Load Review by ODOT Bridge Unit

Loads that meet the minimum axle requirements for weight table 5 but exceed the allowances may request that the load be reviewed by a bridge engineer. In special circumstances, the ODOT Bridge Unit may authorize additional weight for moving a large non-reducible load.
  • All requests are specific to the route, axle weight and axle spacing.
  • Requests sent to the bridge engineers may take up to five (5) business days.
  • Not all of the requests are approved.
  • Any changes made to an approved engineer review will have to be re-submitted.