Under OSHA criteria, which grade of chain slings is allowed for overhead lifting?

The correct choice is based on the standards set by OSHA regarding the use of chain slings for overhead lifting. Grade 8 chains, often referred to as "high-strength" chains, are specifically designed to handle heavy loads and have higher working load limits compared to lower grades. This makes them suitable for overhead lifting applications, where safety and reliability are paramount.

Grade 8 chains have been tested for performance and durability, ensuring that they can withstand the stress and demands of lifting operations without failing. This makes them compliant with regulatory standards that prioritize worker safety during lifting tasks. In addition to Grade 8, any chains rated higher than Grade 8 are also acceptable for overhead lifting due to their superior strength characteristics.

The other grades, such as Grade 5 and Grade 6, do not meet the stringent criteria necessary for safe overhead lifting, as they lack the strength and safety margins provided by Grade 8 and above. Grade 10 chains, while stronger, are not as widely recognized or used in typical overhead lifting applications as Grade 8 chains. Hence, the use of Grade 8 or higher is the standard requirement for ensuring safety during overhead lifting activities.