Spotlight Rigging
Rigging Precision adjustments can be made closer to the load instead of the top of the sling. When not in use, the MIG can remain idle on the chain leg or be removed entirely, preventing inadvertent chain disengagement.
A case study highlights the impact of efficient rigging on operational costs. In a bridge construction project, the MIG was used for repetitive lifting of a 30,000-pound load. The setup included a 25-foot sling connected by chain with shackles to four attachment points at each corner of the load. The MIG was compared to a multi-sheave block, which had a maximum line speed of 20 feet per minute.
The analysis considered 15 lifts per day, with three sling adjustments of two minutes each per lift. The cost of crane rental and labor— including an operator and three riggers— totaled approximately $ 493 per hour. The use of the MIG resulted in a time savings of one hour and 40 minutes per day, translating to a cost reduction of approximately $ 824 per day.
“ This example underscores the importance of proper rigging selection,” Hayes said.“ Choosing the right tools can lead to substantial time and cost savings while enhancing safety.”
Minimizing Risk
Beyond equipment selection, training is critical in minimizing risk. Rigging professionals must understand how different forces impact lifting operations and how to apply best practices in real-world scenarios.
“ Proper training is the foundation of safe and efficient lifting,” Hayes emphasized.“ Industry organizations offer courses to ensure rigging professionals are well-equipped to handle various challenges. Kito Crosby is proud to support education initiatives, including its partnership with the International Union of Operating Engineers in Crosby, Texas.”
Ultimately, selecting the right rigging equipment and investing in training ensures that crane operations minimize risk while maximizing efficiency and cost savings.
“ Choosing the right tools can lead to substantial time and cost savings while enhancing safety.”
Right: The midgrab chain shortener( MIG) is ideal for long chain legs, enabling shortening at the hook rather than the master link.
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March 2025 • www. cranehotline. com