For new rope, the working strength is what fraction of its breaking strength?

The working strength of new rope is typically understood to be one-fifth of its breaking strength. This ratio accounts for safety factors and potential wear and tear that ropes may experience in practical applications. It is essential to have a margin of safety when using any lifting or rigging equipment, and reducing the working strength to a safe fraction of the breaking strength helps prevent accidents and failures.

Rope is designed to handle more than its usual load capacity, but in real-world scenarios, factors such as friction, knots, and overloading can significantly impact its performance. By adhering to the guideline that sets the working strength as one-fifth of the breaking strength, users can ensure a safer approach when lifting or rigging. This understanding is crucial for millwrights and riggers who rely on ropes for heavy loads, as it promotes practices that enhance safety in the workplace.