Crane with boom raising assist structure

摘要

A lift crane (10) including a boom raising assist structure (40) connected to the boom (20). The boom raising assist structure (40) preferably includes at least one ground engaging member in contact with the ground; and a boom elevating member extending between the assist structure ground engaging member and the boom. The boom elevating member supports at least a part of the weight of the boom (22). A method of setting up a lift crane (10) including positioning the boom raising assist structure (40) between the ground and the boom (22), c) using the boom raising assist structure (40) and the boom hoist mechanism together to pivot the boom (22) about its connection to the rotating bed (20).