Any time a 2-hook pick is made, the crew needs to determine the weight carried by each hook, based on the center-of-gravity (CG) of the load. Review the schematic below and then evaluate the Master Rigger's Reference Card Panel 9 and the Journeyman Rigger's Reference Card Panel 2.
Workshop Assignment: First find the load's CG, then determine the weight being carried by the 30 and 10-ton hooks respectively. Answer the questions listed, and then check your work against the answers listed below. Have fun!
1. The CG is ___ ft. from the west end.
2. The portion of the assembly lifted by the 30-ton hook block is ___ lbs.
Master Rigger's Reference Card Panel 9:
Journeyman Rigger's Reference Card Panel 2:
Happy trails to all my crane and rigging friends,
Mike Parnell
ITI-Field Services
P.S. This article was originally published in The Professional Rigger Newsletter - 2-Hook Pick.
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