Mike Parnell

A special condition arises when lifting a load whose pick points are not on the same elevation. In determining the slings and rigging hardware necessary for the lift, the rigging…

Some loads can be single point picked, and the rigging is selected based on suspended weight. Other times, a rigging task will require that we use a few steps to get…

Circle the best answer for each system which matches the illustrations at the right. Information: All winches have a maximum capacity of 2 tons. All single sheave rigging blocks are…

Identify the rigging method below which provides the best load control of the two hitch systems illustrated. Answers below. Happy trails to all my crane and rigging friends,
 Mike Parnell…

Rig from the bottom up. Select the correct rigging for the load below using the Master Rigger’s Reference Card panels at the right. Answers can be found below. Happy trails…

Once in a while we are faced with a rigging challenge that requires us to go back to a² + b² = c² . To solve the following “tension” questions…

When a load’s lifting points are not on the same plane or elevation, the tension in each sling must be calculated in a little more formal method. Use the panels…

The Crane and Rigging Rodeo at ConExpo 2011 was a tremendous success! Crane operators performed tasks that challenged their ability to operate a crane and suspended load through a pre-designated…

Identify the rigging that does not have sufficient rated capacity for the load. If under-rigged, suggest the proper size. Use the panels from the Journeyman Rigger’s Reference Card (pictured below)…

When using temporary trolley beams to hoist and transfer a load, special consideration must be given to the loads imposed at the beam’s support points. In the following example, the…