Grade 110/20 wire rope has the highest strength.

Grade 110/20 wire rope has the highest strength.

• A. False
• B. True
• C. Cannot be determined
• D. Only for certain diameters

Answer: (A)

The important idea is that rope strength comes from two factors: the material’s strength (the grade) and the rope’s size (its diameter). Breaking strength is roughly the wire’s tensile strength times the rope’s cross-sectional area. That means a larger-diameter rope, even with a lower grade, can have a bigger absolute breaking strength than a smaller-diameter rope with a higher grade. So simply saying a Grade 110/20 rope has the highest strength isn’t reliable, because it ignores the effect of diameter and construction. In practice you look at the actual rated breaking strength or working load limit for the specific rope diameter and construction, not the grade alone.

The important idea is that rope strength comes from two factors: the material’s strength (the grade) and the rope’s size (its diameter). Breaking strength is roughly the wire’s tensile strength times the rope’s cross-sectional area. That means a larger-diameter rope, even with a lower grade, can have a bigger absolute breaking strength than a smaller-diameter rope with a higher grade. So simply saying a Grade 110/20 rope has the highest strength isn’t reliable, because it ignores the effect of diameter and construction. In practice you look at the actual rated breaking strength or working load limit for the specific rope diameter and construction, not the grade alone.