What percentage efficiency does a Grief knot represent?

The Grief knot, commonly used in rigging and climbing applications, is designed for joining two ropes together. The knot is known for its stability and ease of untie after bearing a load. However, when it comes to efficiency, the Grief knot does not have a standardized efficiency percentage like some other knots.

Efficiency in knot terms usually refers to the amount of strength retained in the rope after the knot is tied. Many knots can be tested to determine their efficiency, but the Grief knot is not typically characterized by a specific efficiency rating due to its variable performance under different conditions. This makes “not applicable” the most accurate choice, as there isn't a definitive percentage that can be attributed to the Grief knot in general rigging practices.

In contrast, other knots have specific efficiency ratings that have been established through research and testing, which is why they are often referenced with a percentage. The absence of a clear measurement for the Grief knot aligns with the understanding that certain knots, especially those less commonly used or studied, may not have a designated efficiency rating.