How should rope length be measured for double-wrapped installations?

For double-wrapped installations, measuring the rope length accurately is essential to ensure proper functioning and safety. The correct approach is to include the extra length that is wrapped around secondary and drive sheaves. This includes any loops or extensions that contribute to the overall length needed for effective operation.

Taking into account the extra length around the sheaves is important because it affects how the rope interacts with the mechanisms involved. If only the visible rope length were measured, it could lead to too short a measurement, causing improper tension and ultimately risking operational failure or danger during use. Similarly, measuring only from the top of the sheave could overlook the requirements for secure anchoring and proper function of the entire system. Ignoring the length altogether is not an advisable practice, as it would directly impact the performance and safety of the installation.

In summary, including the extra length wrapped around secondary and drive sheaves ensures that the rope functions correctly and safely within the double-wrapped system.