INSTALLATION METHOD FOR HEAVY OBJECT

PURPOSE:To perform efficient installation of a heavy object by unhooking a safety hook through remote operation and preventing entanglement of an auxiliary wire, served to operate the safety hook, during a lifting work. CONSTITUTION:A jig 10 for a slinging work is formed and a safety hook 3 unhooked through remote operation is suspended from a hook tool 13 at the lower part of a frame body 11 through an auxiliary wire 7. Thereafter, the safety hook 3 is hooked to the hook tool 2 of a heavy object, and the heavy object 1 is installed in a given position in a way that a main wire 6 is lifted in a state that the auxiliary wire 7 is loosened by means of a crane and the heavy object 1 is lifted through the jig 10 for a slinging work. Thereafter, the main wire 6 of the crane is slightly loosened and the auxiliary wire 7 is wound up to unhook the safety hook 3 from the hook tool 2 for a heavy object.