What breaking strength of a rope is noted for having a knot according to SSSF guidelines?

The breaking strength of a rope when a knot is present, according to SSSF guidelines, is noted as 20 kN. This standard is significant because it accounts for the reduction in strength that occurs when a knot is tied in a rope. Knots can weaken the rope by as much as 30-50% depending on the type of knot, its configuration, and the rope material.

By identifying 20 kN as the breaking strength for a rope with a knot, the guidelines ensure that rescue technicians have a clear understanding of the limits they must work within for safety and effectiveness during rescue operations. This can help in planning operations effectively, ensuring that the selected equipment and techniques will safely support the weight being lifted or lowered. The specified strength also aids in training protocols and safety discussions, making it an essential reference for personnel involved in rope rescue situations.