The present application relates to a loading unit and/or lifting unit, in particular a reach stacker, comprising one or more pick-ups for the detection of at least one operating parameter influencing the standing safety of the unit and comprising a calculating unit in communication with the pick-up(s) which has means by means of which a maximum permitted value of an operating parameter of the loading unit and/or lifting unit for the ensuring of the standing safety is determined in dependence on one or more of the detected operating parameters.