Patent ID: 7290672

Claim:
A tower crane device comprising: a first basket supporting a tower crane that includes a tower; a second upper basket slidably coupled to the tower; a plurality of support members supporting the first basket and the tower crane with each support member directly attached to at least one of a plurality of respective vertical steel columns of a structure under construction, the plurality of vertical steel columns defining a periphery of a bay; and a plurality of additional support members with each additional support member attached to at least one of the plurality of respective vertical steel columns of the structure under construction and supporting the second basket, wherein the plurality of vertical steel columns includes at least three vertical steel columns, each support member and additional support member has an uppermost surface, at least two of the plurality of support members are positioned at a substantially right angle to each other, the first basket rests on the uppermost surface of at least one of the two support members positioned at a substantially right angle to each other, and the first basket is positioned within the bay.