Maximum Allowable Weight for Truck & Full Trailer Combination


Interaxle spacing
Max. combined weight

Percentage axle limit

Axle Group Number of axles Tridem Axle Spread Number of tires Tire size Rated tire capacity Allowable axle weight Notes
Steering
Drives
Trailer 1
Trailer 2
Maximum Allowable Gross Weight
Minimum registered weight

  1. This function calculates the maximum allowable weights as per the Commercial Vehicle Dimension and Weight Regulation of the Traffic Safety Act. Where the information shown on this page is not in agreement with the regulation, the regulation shall prevail.

  2. This function does not take into consideration the "gross axle weight rating" (GAWR) or the "gross vehicle weight rating" (GVWR) of the vehicle. The owner/operator of the vehicle should ensure that the weight carried is within the manufacturer's rated capacity specifications.

  3. The "Rated tire capacity" is the rated capacity of one tire, based on either single or dual application, as stamped on the sidewall of the tire.

  4. The gross weight on the full trailer is capped at 31,000 kg.

  5. The gross weight of a tandem drive truck and full trailer combinations is capped at 53,500 kg and the gross weight for a tridem drive truck and trailer is capped at 63,500 kg.

  6. When the interaxle spacing is less than the minimum specified in regulations, the combined axle weight for the combination is reduced by 500 kg for every 0.1 metre or portion thereof. This will also reduce the allowable GVW. Notwithstanding the requirements for the interaxle spacing, the trailers shall also conform to all other legal dimension requirements such as trailer wheelbase and overhang.

  7. The maximum weight allowed on municipal roads is 17,000 kg on a tridem axle and 53,500 kg for the GVW. Permits may be available to exceed these weight limits, subject to municipal approval. Contact the Central Permit Office at 1-800-662-7138 (in North America) or 403-342-7138 for details.