Abstract: In a method for determining a load that is lifted or to be lifted by a hydraulic lifting device, for the determining the load lifted or to be lifted, in a reference phase, the lifting device is moved into a reference position in a first loading state of the lifting device. A first detection of the forces currently acting on the lifting device and the current geometry of the lifting device occurs in the reference position. In a measurement phase, the lifting device is moved into a measurement position in a second loading state, and a second detection of the forces currently acting on the lifting device and the current geometry of the lifting device occurs in the measurement position. In a comparison phase, the lifted load is characterized by a comparison of the respective detected forces currently acting on the lifting device and the respective detected current geometry of the lifting device.

Abstract: The invention relates to a method for signaling the danger of a crane tipping, comprising at least three alarm systems for signaling tipping warnings using a respective safety programme. At least one measurement value is obtained from the crane, at least two alarm systems for signaling the tipping warning are selected in accordance with the at least one measurement value and if a warning of tipping is signaled by at least two of the at least two selected alarm signals, a tipping warning is signalled.