About AxleLoad 53 and contact

Updated October 18, 2026

AxleLoad 53 is a load-planning tool for truck drivers and dispatchers working with 53-foot semi-trailers in Canada and the United States.

Why this tool

A trailer can be under the gross weight limit and still overload one axle group. Drivers often find out too late, at the scale or the inspection station. AxleLoad 53 shows the distribution before loading, lets you compare slider and fifth-wheel settings, and helps you keep a safety margin.

Who builds it

AxleLoad 53 is developed and operated by GestionsPro-Innov, in Quebec, Canada. The app is available in English, French and Spanish, on the web, Android and iOS.

Where the limits come from

Quebec: Quebec Ministry of Transportation Guide des normes de charges et dimensions des véhicules, 2026 edition (Table 1, Table 2 and the thaw period).
Canada: the interprovincial memorandum of understanding on heavy vehicle weights and dimensions.
United States: federal Interstate limits and Federal Bridge Formula B, plus California’s 40-foot kingpin-to-axle rule.

We update the limits when a new edition of these documents is published. If you spot a difference, write to us and include the source.

What the tool does not replace

AxleLoad 53 gives an estimate based on the weights you enter. It does not replace a certified scale weight, a special permit, or local restrictions from a municipality or a bridge.

Contact us

Questions, suggestions or an error to report: 628gilbert@gmail.com. We usually reply within a few business days.

Open the AxleLoad 53 calculator →Free, in English, French and Spanish. Works on a phone in the cab.

More guides

AxleLoad 53 user guideHow to plan a load in AxleLoad 53: regulations, equipment, pallets, reading the gauges and saving loads.Axle weight limits in Canada and the United StatesSteer, tandem, tridem, gross weight and the Bridge Formula: the limits that apply to a tractor with a 53-foot semi-trailer.Balancing a 53-foot trailer: slider, fifth wheel and palletsHow pallet weight splits between the kingpin and the trailer axles, and how many pounds each slider hole or fifth-wheel notch moves.Quebec spring thaw: zones, dates and load reductionsWhy allowed loads drop every spring in Quebec, how the thaw zones work and how to plan your loads.California’s 40-foot kingpin-to-axle ruleWhat California’s 40-foot KPRA rule measures, how to check it on a 53-foot trailer and how it changes your axle weights.Weighing your truck on a certified scaleHow to weigh axle group by axle group, read a scale ticket and measure your tares for more accurate calculations.Loading and axle weight glossaryKingpin, fifth wheel, slider, tandem, tridem, gross weight, tare, Bridge Formula: loading terms explained simply.AxleLoad 53 frequently asked questionsAnswers about the calculation, accuracy, regulations, spring thaw, accounts, the subscription and privacy.

This guide is for information only. Legal limits change and depend on the road, the season and your permits: always check with the competent authority. Certified scale weights govern.