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Maximum Allowable Weight for C-train Combination

Maximum Allowable Weight for C-train Combination

Interaxle spacing
Max. combined weight

Percentage axle limit
Axle Group Number of axles Number of tires Tire size Rated tire capacity Allowable axle weight Notes
Trailer 1
Trailer 2 Front
Trailer 2 Rear
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 steering axle weight for a truck tractor is capped at 6,000 kg.

  5. The Gross Vehicle Weight for a C-train is capped at 60,500 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. When the interaxle spacing between the last axle on the lead trailer and the first axle on the second trailer is less than 3.0 metres, the combined weight is limited to 24,000 kg. This will also reduce the allowable GVW. Notwithstanding the requirments for the interaxle spacing, the trailers shall also conform to all other legal dimension requirements such as trailer wheelbase and overhang.

  7. The sum of the weights on the axles of the second trailer cannot exceed the sum of the truck tractor drive axle group and the lead trailer axle group.