Tanker or cement truck

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Tanker or cement truck

Liquid and bulk cargoes can also be estimated to determine axle loads. Let’s consider a couple of examples.

Task 1. Bulk cargo in a single-section cement truck.
– Calculate the maximum allowable mass of bulk cargo for a given transport.
– Load the maximum mass of bulk cargo, controlling for axle loads.

Initial data:

    • The vehicle is a 5-axle truck Volvo FH12 (4×2) tractor, Kessbor SSL32 trailer.
    • Normative axle load limits are 10 ton/axle.


We configure the axles of the vehicle combining the tractor from TruckLoader database with a semi-trailer formed according to the data from the internet.

Dimensions of Kassbohrer SSL30 cement trailer

  • Tank volume, m3 30
  • Tank diameter, mm 2.550
  • Heigh, mm 3.970
  • Wheelbase, mm 6.200
  • Axle spacing, mm 1.310

The tank is equivalent to a conventional truck body since its shape is symmetrical relative to the center. Cement crumbles evenly, so we set it as a single load equal to the dimensions of the body and place it inside.

The only parameter adjustable for this task is the total mass of cargo. Varying it results in changes in the axial loads. Pretty quickly, we find the optimal solution for our given task – 22.5 tons. The load distribution is as follows.

Axle load distribution for 22.5 tons cargo

Conclusion: For this combination of tractor and cement trailer, 22.5-23 tons of cargo can be transported without axle overload

If the tank has several sections, it is possible to select the balancing of the cargo mass.

Task 2. Bulk cargo in a three-section tank.
– Calculate the maximum allowable bulk mass and its volumetric distribution in sections of the tank.

To solve the problem, we create cargoes with the same sizes as the sections, equivalent to 500-1000 liters with the corresponding mass, which depends on the cargo density. The height of the loads can be selected based on the maximum volume of the section. Having set the required quantity of such unified cargoes, determined by target mass, we perform the calculation in the “Balance. No Template” mode with the “Cargoes on top of each other” option.

Distribution of bulk cargo into sections and resulting axle loads

Thus, the optimal distribution of bulk cargo in three sections is as follows:
– Section 1 – 7,000 liters (8.1 tons);
– Section 2 – 6,000 liters (7 tons);
– Section 3 – 4,300 liters (5 tons).

Optimization of liquid and bulk cargoes is possible. For single-section tanks, maximum mass can be selected, taking into account the axial restrictions. For multi-section tanks, load balancing is achievable via the selection of cargo volume in each section.