Do you already know what the stability of a tilting device is based on?

In our technical information section we have posted the complete document entitled “Stability of a tilting device”.

This document is not intended to be a study on the stability of a tipper, but a simple description of the tilting process in order to understand and avoid the risks inherent in this process. The following is a brief summary for those interested in the subject in order to make it easier to understand.


First of all, we will proceed to define the tilting process, which we understand as a dynamic process that varies according to the angle of rotation of the box, from 0ᵒ in horizontal position to 40ᵒ – 45ᵒ at maximum elevation.

Como basculante estable entendemos un elemento sujeto y condicionado por un elevado número de variables:

  • Una desigualdad en la carga.
  • Un suelo inclinado o blando (suelo que se hunde).
  • Unas ballestas cedidas.
  • Paso de aire de los cojines de suspensión de un lado a otro.
  • Neumáticos con presiones y aplastamientos distintos.
  • Chasis con distinta flexibilidad en los largueros.
  • Ejes de giro mal alineados o con holguras.
  • Cajas poco resistentes.
  • Tractora no alineada con el semirremolque.
  • Etc.

These cases, and others not described, can occur alone or in different combinations and proportions, causing a cumulative effect. These effects can add or subtract.


  • Stability of the semi-trailer. The assembly shall be stable as long as the vertical projection of the centre of gravity of the load is within the support base. In this situation the assembly is stable and does not tip over.
  • Suspension height variation. Load differences cause height differences, which tilt the pivot axis of the body relative to the horizontal.
  • Different bending of the pivot brackets. The difference in suspension height, the flattening of the tyres and the bending of the rear of the longitudinal members are cumulative effects and increasingly tilt the pivot axis of the body. The instability of the body increases with the degree of lift, as the centre of gravity is higher and the lateral displacement to one side or the other is greater.

After these four basic points, we establish a series of actions that improve stability and others that cause the semi-trailer to fall, finally commenting on the lateral resistance of the chassis.