What is the minimum strength required for a single deviation?

The minimum strength required for a single deviation is best categorized as "fit for purpose." This means that the equipment or setup used must adequately handle the forces it will encounter during use, ensuring safety and effectiveness in various scenarios. The term "fit for purpose" emphasizes that the specific requirements may vary based on the context and type of work being performed, rather than adhering to a fixed numerical value like 10kN or 20kN.

Different climbing situations, environmental conditions, and the characteristics of the equipment used can all impact what constitutes "fit for purpose." This flexibility allows for adaptability and consideration of specific operational demands, which is crucial in rope access work where conditions can change.

Moreover, values like 10kN or 20kN may not always align with the real-world requirements of every deviation, as practical applications often require specialized assessment. Setting a maximum strength, like in the context of 15kN, could equally be inadequate for certain scenarios, potentially impacting the safety and reliability of setups. The emphasis on "fit for purpose" ensures that technicians make informed choices based on the specifics of their tasks.