What strength is the breaking capacity of runners or slings typically around?

The breaking capacity of runners or slings is typically around 22 kN, which aligns with the correct answer. This strength is a standard benchmark within the industry, ensuring that the equipment used in rescue scenarios can safely handle significant loads while providing a margin for safety.

Runners and slings are critical components in rope rescue systems, as they are often subjected to dynamic forces and heavy loads during rescue operations. A breaking strength of 22 kN reflects the strength needed to withstand these forces while minimizing the risk of failure. It's essential for rescuers to use equipment rated at this level or higher to ensure safety when performing operations.

Recognizing this standard is crucial for anyone involved in rope rescue, as it helps in making informed decisions regarding equipment selection and operational safety. The other choices are lower than this standard and would not provide adequate safety margins for the loads typically encountered in rescue situations.