What Factors Limit the Use of Two-Strand Twist Cordage?

Limited Strength and Durability

When it comes to two-strand twist cordage, its primary limitation is its relatively low strength-to-weight ratio. This is due to the nature of the twist technique, which does not create a strong, interlocking bond between the strands. As a result, two-strand twist cordage has a lower tensile strength and is more prone to breakage under stress. For example, a two-strand twist cordage made from two 3mm cord fragments may have a tensile strength of around 50-70 kgf (kilograms-force), depending on the material and technique used.

Restricted Versatility

Another limitation of two-strand twist cordage is its limited versatility in various environments. This technique is best suited for dry, temperate climates, where the risk of moisture and extreme temperatures is minimal. However, in humid or wet conditions, two-strand twist cordage is more susceptible to degradation and failure. Furthermore, this technique is not ideal for applications where high loads or sustained tension are involved, such as in load-bearing tasks or climbing.

Comparison to Other Techniques

In contrast to other cordage techniques, such as the reverse wrap or Z-wrap, two-strand twist cordage is relatively slow to create and may not be as effective in emergency situations. The reverse wrap technique, for example, can produce a stronger and more durable cordage in a shorter amount of time. This is because the reverse wrap technique involves wrapping the cord around a central axis, creating a tighter and more secure bond between the strands. As a result, the reverse wrap technique is often preferred in survival situations where time is of the essence and cordage is required for load-bearing tasks or other critical applications.