Rigging | Safety and Training | By Henry Brozyna | Sep 13, 2019
Overhead Lifting Slings are generally used in conjunction with a crane, powered hoist, manual or lever hoist or some type of lifting device. There are numerous types of materials used for building overhead lifting slings – each with specific advantages and disadvantages – including:
Before you select a sling it is important to fully understand the application and gather specific information on how the sling will be used. When choosing a sling, you must know the weight, center of gravity, number of attachment points for a balanced lift, sling angles, reach, upper and lower fittings and ambient conditions. Communicate or obtain as much background information as you can about the load being lifted, then decide what type of sling works best. This will help ensure you choose the right sling material and configuration for the task at hand.
When using chain slings, the American Society of Mechanical Engineers (ASME), the National Association of Chain Manufacturers (NACM), and the Occupational Safety & Health Administration (OSHA) recommend only the use of alloy steel chain for overhead lifting. Grades 63, 80 and 100 are the alloy steel chains used throughout the industry. They contain elements that give them their unique strength, abrasion resistance, durability and toughness. Per ASTM Standards, alloy chain slings must have the ability to elongate at least 20% when overloaded in order to have a visual indicator to the rigger that the sling is overloaded. Once any stretch is discovered, the chain sling must be removed from service. Synthetics do not have any such indicators as standard.
Columbus McKinnon’s chain manufacturing roots date back to the 1800s. We hold patents for chain and chain link design as well as the chain manufacturing processes, which help ensure our chain is the strongest and most reliable chain on the market today. We also invented the first alloy chain in 1933 – the forerunner to our industry-changing Herc-Alloy® 800 and 100 chains. In addition to chain, we also manufacture a variety of dual-rated hooks, links, sub-assemblies and other attachments that complement our chain offering.
For additional information on the safe and proper use of chain slings, check out our Safety Webinar on Chain Sling Inspection.
Henry Brozyna is an Industry Product Trainer at Columbus McKinnon specializing in Crane and Hoist Inspection and Repair, Rigging & Load Securement He has been training on crane and rigging safety for more than 20 years. Henry is a member of the Tie Down committee and former Board of Directors for the WSTDA; this group writes the standards that are used by the material handling industry, the transportation industry, and also law enforcement. Henry is also a current member of the Crane Institute’s board of directors.