合力与有效接触面之比。对于工业车辆，集中载荷来自最大车轮力除以胎面面积。该面积取决于负载和车轮类型。但是，该负载仅是准集中负载，因为它类似于与面积单位有关的每单位面积的负载。

        Ratio of resulting force and effective contact surface. For industrial trucks the concentrated load results from the highest wheel force divided by the tread area. This area is determined in dependence on the load and on the wheel type. However, this load is only a quasi-concentrated load, as it is analogous to the load per unit area related to an area unit.