A Method and an Auxiliary Boom for a Crane System

A method for installing an auxiliary boom in a crane system, the crane system comprising a main boom, a crane base, a tip end and a main wire, wherein the method comprises following steps:

• providing the auxiliary boom, wherein the auxiliary boom comprises a hoisting end, a base end, and a boom part, wherein the boom part is arranged between the hoisting end and the base end, and at least one wire handling means;
• arranging said main wire in a hoisting grip in said wire handling means at the hoisting end of the auxiliary boom;
• hoisting the auxiliary boom using the main wire, wherein a hoisting position of the auxiliary boom is determined by the auxiliary boom's center of gravity;
• arranging the auxiliary boom or part of auxiliary boom relative to said main boom, when holding the auxiliary boom with the main wire;
• attaching the auxiliary boom to the main boom and/or to the crane base, when holding the auxiliary boom with the main wire, in a position wherein the auxiliary boom or part of the auxiliary boom is arranged along the main boom, and
• arranging the main wire in and/or through the auxiliary boom's wire handling means, such that the crane system's lifting capacity is defined by the auxiliary boom, while using the main wire for hoisting a load.