Abstract: A method of operating a mobile crane with a boom includes the steps of determining maximum permissible loads for a plurality of positions in a predetermined position range of the boom, determining a load limit and/or one or more load ranges based on a suspended load and on the maximum permissible loads for the plurality of positions of the predetermined position range of the boom, and operating the mobile crane dependent upon the load limit and/or the one or more load ranges. The load limit can be a local load limit and the one or more load ranges can be one or more local load ranges.

Abstract: A method of operating a mobile crane with a boom includes the steps of determining maximum permissible loads for a plurality of positions in a predetermined position range of the boom, determining a load limit and/or one or more load ranges based on a suspended load and on the maximum permissible loads for the plurality of positions of the predetermined position range of the boom, and operating the mobile crane dependent upon the load limit and/or the one or more load ranges. The load limit can be a local load limit and the one or more load ranges can be one or more local load ranges.

Abstract: The invention relates to a controller for an adjustable jib extension of a mobile crane, comprising a telescoping main jib and a jib extension placed thereon, the luffing angle of the extension being adjustable by way of a luffing winch or a piston-cylinder unit. For this purpose, the actuation of the winch moving the luffer or of the piston-cylinder unit is carried out via a control circuit such that during the extension and/or retraction of the telescoping jib, or when changing the angle of the main jib with respect to the horizontal, the angle of the luffer with respect to the telescoping main jib and/or the horizontal remains constant or changes to a predefined extent.