How to Calculate Truck Axle Loads

Written by katrina matterhorn
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When loading a commercial truck, you must compute and weigh each load on each axle. Overloading for extended periods of time can create steering problems, overloaded tires and maintenance issues. There are certified weight scales you can use as well as a calculation to ensure you are loading the truck properly.

Skill level:
Moderate

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Instructions

  1. 1

    Locate the nearest certified truck weight scale before loading the truck (See Resources). Get each axle weighed separately. This will tell you what the axle loading is before the truck is loaded.

  2. 2

    Subtract the unloaded weight of each axle from the maximum allowable loaded weight of each axle.

  3. 3

    Use the following formula to compute for loading front and rear axle weights: (LCf)(Lf) - (LCr)(WB-Lf) = 0. Replace "LCf" with "Load capacity of the front axle." Replace "LCr" with "Load capacity of the rear axle." Replace "LF" with the distance to load centre from the front axle. Replace "WB" with the "Wheelbase of the vehicle."

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