Axial loads

Respecting the limits for axial loads: An obligation

In addition to respecting the limit for total mass on load, vehicles and vehicle combinations must respect the limits regarding axial loads.

Solutions for making loads distribution easier

The person responsible for the loading of a vehicle must ensure that the weight is adequately distributed on the axles and groups of axles, to respect the regulatory limits.

There are several ways to make loads distribution easier:

  • Choose a vehicle that is well balanced.
  • Develop a loading plan.
  • Use an axial load calculation software, which allows to determine the vehicle’s optimal configuration.
  • Use an onboard weighing system, installed on the vehicle’s suspension, which indicates the axial load in real time and allows to rationalize the loading process.
  • Determine the load by using a weigh scale. A unique platform scale can allow for the determination of the axial loads, in as much as the approaches are on the same level as the scale’s platform.

Control of loads

The mission of Contrôle routier Québec is to verify the compliance of heavy vehicles with the load limits imposed. These verifications take place in permanent control stations, but also on the road, with portable weighing equipment.

Controllers enforce a strict compliance policy. Thus, any non-compliant vehicle that is overloaded, or that represents a risk, cannot go back on the road until it has complied with the regulations.

Some figures

  • In any given year, controllers check about 98,000 vehicles that move people and goods.
  • Approximately 46 % of violations due to overloading specifically involve axial loads.
  • Approximately 76 % of violations due to axial overload involve a tandem axle.
  • Approximately 62 % of violations due to axial overload are issued during a period of thaw.
  • The fine given for a violation due to axial overload is 150$ on the road. It is 300$ if the violation happens when the vehicle is moving on a bridge or an overhead bridge on which signalling prohibits the traffic of such vehicles in overload.