| 摘要 |
PROBLEM TO BE SOLVED: To provide a crane for an steel tower capable of being easily connected to the steel tower even if a projection such as a ladder is present on the facing surface of the steel tower to a mast, and increasing the degree of freedom of setting a distance of the mast from the steel tower. SOLUTION: This crane for an steel tower is provided with mast holders 51A and 51B detachably arranged between intermediate parts of the mast 21 and the steel tower 1 in process of construction or in process of dismantlement, and supporting the intermediate parts of the mast 21. Each the mast holders 51A and 51B is provided with: a basic beam 52 having a length not shorter than the facing surface width of the steel tower 1 at the mast side; distance keeping frames 51A and 51B interposed between right and left columns 2A at the facing surface side to the mast 21 of the steel tower 1 in process of construction or in process of dismantlement, and the basic beam 52; and three or more support rods 69, 70 and 75 connected to a member having a base end side attached to the basic beam 52 and a front end side connected to the mast 21. COPYRIGHT: (C)2009,JPO&INPIT
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