Can You Test Natural Cordage Strength with Household Items?

Testing with Weights

To test the strength of a natural cordage, you can use the “three rocks” method. Find three rocks of increasing weight (1 pound, 2 pounds, and 3 pounds) and attach them to the cordage in series. If the cordage can hold all three rocks without breaking, it’s likely to be strong enough for most wilderness applications. For a more precise measure, use a spring scale to apply constant tension to the cordage, gradually increasing the weight until it fails.

Testing with Reverse Wrap

The reverse wrap technique can be used to test the strength of a cordage by applying constant tension and gradually increasing the number of wraps. To perform the reverse wrap test, start by wrapping the cordage around a sturdy object (like a tree trunk) with a minimal number of wraps (5-10). Then, carefully remove the wraps, one by one, while maintaining constant tension on the cordage using a spring scale. The number of wraps it takes for the cordage to fail indicates its strength. For example, if the cordage fails at 25 wraps, it’s likely to be strong enough for a variety of tasks, but may not withstand extreme loads.