Method for erecting beam of crane, particularly for erecting lattice jib, involves erecting beam from laid down position, in which traction force is exerted on beam by traction element, particularly restraint

摘要

The method involves erecting a beam from a laid down position, in which a traction force is exerted on the beam by a traction element, particularly a restraint. A lever arm (100) of the tensioning element for lifting the beam is produced by an auxiliary crane (200) while erecting the beam. The tensioning element is held by the auxiliary crane while rising from the rotation axis of a jib (54) at a distance. The tensioning element of an attachment point with the jib on the crane hook is extended to another attachment point at the auxiliary crane.