Abstract: A device for checking a contour of a load received on an industrial truck. The device comprises a subsurface travelable by the industrial truck and two or more sensor units configured for recording two-dimensional data and arranged such that a substantially vertical detection area is spanned. The device comprises a control device configured to one or more of specify or determine the relative position of the industrial truck located on the travelable subsurface with respect to the substantially vertical detection area. The control device comprises at least one evaluation unit configured to evaluate data recorded by the two or more sensor units to determine, based on the relative position, that the area occupied by one or more of the industrial truck or the load carried by the industrial truck in the detection area meets a predetermined condition.

Abstract: The invention relates to a construction machine having a mast and a lifting element which can be moved up and down along the mast with a hoist rope. The hoist rope can be activated by means of two rope winches. At least one first rope winch is designed as a free fall winch, wherein the hoist rope can be lowered in free fall. To lower the hoist rope a controller is provided, with which the first rope winch, which is designed as a free fall winch, can be switched into a free fall mode. Meanwhile, a second rope winch is operated in force-locking manner.

Abstract: The invention relates to a construction machine having a mast and a lifting element which can be moved up and down along the mast with a hoist rope. The hoist rope can be activated by means of two rope winches. At least one first rope winch is designed as a free fall winch, wherein the hoist rope can be lowered in free fall. To lower the hoist rope a controller is provided, with which the first rope winch, which is designed as a free fall winch, can be switched into a free fall mode. Meanwhile, a second rope winch is operated in force-locking manner.