In the example capacity for a 4 inch grade 100 alloy chain three-leg sling, what grade is the chain?

• A. Grade 80
• B. Grade 70
• C. Grade 100
• D. Grade 120

Answer: (C)

In this context, the grade of a chain sling is the numeric designation that identifies its strength. The description explicitly says it’s a “grade 100 alloy chain,” so the chain’s grade is 100. The diameter (four inches) influences how much weight the chain can carry, but it doesn’t change the grade itself. Knowing the grade helps you match the chain to the load safely, since higher grades (like 100) indicate greater strength than lower ones (such as 70 or 80), and there are other grades like 120 that would indicate yet another specification. So, the chain’s grade is 100.