Which of the following is a main type of wire rope used in cranes?

• A. 6x19
• B. 7x19
• C. 8x19
• D. 7x37

Answer: (A)

Wire rope performance hinges on its construction: how many strands and how many wires are in each strand determine strength, wear resistance, and how well the rope holds up under bending over pulleys and drums. In cranes, the lifting rope that is most commonly used is built with six strands, each containing nineteen wires. That six-by-nineteen arrangement provides a strong, durable rope that resists crushing and fatigue from repeated bending, while still offering enough stiffness to wind properly on a drum and hold up under heavy loads. The other constructions—more strands or significantly more flexible configurations—are typically chosen for different needs like greater flexibility for lighter tasks or control lines, but they don’t balance strength and wear in the same way for main hoisting ropes. Hence, the six-by-nineteen rope is the standard main type for crane lifting.