Coil Lifting Systems Webinar-Coil Lifting Systems Webinar Handout

Coil Lifting Systems Webinar Handout

Pdf Summary

This document discusses the considerations and safety issues surrounding the use of lifting hardware with steel coils or coil pattern thread engagements. It highlights the lack of a national standard for the manufacturing of these coil products, leading to variations in dimensions, tolerances, and capacities among different manufacturers. Mixing coil inserts, nuts, rods, and bolts from different suppliers can impact the capacity and performance of the connection due to loose or tight fits and different thread pitches. <br /><br />The document emphasizes that coil threaded systems are prone to higher wear factors on the thread surfaces compared to regular thread systems. Regular inspections are necessary to ensure that tolerances have not been compromised due to use and wear. The document provides information on different types of coil inserts, nuts, rods, and bolts, and offers tips on confirming their strength and compatibility with lifting devices. Proper alignment with crane lines, lifting angles, and the use of shackle, washer, and cushions are also discussed.<br /><br />Manufacturing differences such as diameter, thread pitch, wire diameter and grade, coil length and number of turns, and coating types and procedures can affect the design capacity. The document provides a checklist for inspecting welds, nuts, bolts, rods, and lifting hardware for various criteria such as pitch, diameter, markings, cracks, dents, worn threads, rust, and concrete residue.<br /><br />Other considerations include proper thread engagement, insert selection, and bolt length, as well as inspection methods using tools like gauges and calipers. The document concludes by mentioning additional considerations such as tilt-up vs. precast, debris, water accumulation protection for inserts, and compliance with OSHA standards.

Keywords

lifting hardware

steel coils

coil pattern thread engagements

manufacturing variations

coil inserts

thread wear factors

regular inspections

tolerance compromise

inspection checklist

OSHA standards