Concrete component to crane attachment bolt - has link with cross-stay between pivot and hook eyes

摘要

The bolt attaches a prefabricated concrete component to a crane with a shank and connecting head, grouted into the component. A spherical connector can be attached to it, this having a protruding manipulation arm. The connector has a curved groove of cross-section to accommodatete the bolt head, the latter being inserted in it via an opening at one end. The shank is guided in the groove, and the connector has an eye at right angles to the plane of the groove accommodating the crane shackle. The shackle is in the form of a link with a cross-stay (7), a stay (11) separating a pivot eye (12) from one accommodating the crane hook (13).