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In this phase of research, we investigated the loosening processes of the slings and the specific effects of the different cargo ends during the essentially vertical movement and shaking of various unit loads secured by sling load anchorage.
The investigations are focused on the forces generated in the vertical plane (perpendicular to the loading surface) during the transport of goods, such as:
    - passing through an uneven road
        o per axle,
        o per row of wheels,
        o per wheel.
These forces occur under general, normal traffic conditions, and individually, due to their relatively low intensity, have only a minimal effect on the load securing, but due to their large number and repetitive nature, it is necessary to analyse their effects over a given interval.
In the tests, the moving platform is moved by independent actuation of four working cylinders, which move the platform and the fixed load placed on it.
The repetitive nature of the forces is controlled by the equipment, the periodicity and number of which are specified by the operator.
The loads are secured by 2 to 2 straps to the load securing eyes on the moving platform. Both slings are instrumented and the magnitude of the forces acting on the slings is continuously detected from the initial pre-tensioning force through the process of loosening until the end of the measuring cycle.