Quick Answer
Using tarred bankline for hammock suspension is generally not recommended due to the high risk of accidents and injuries caused by the tar's tendency to dry out and become brittle over time.
Tar’s Drying Effects
Tar is a viscous liquid derived from coal or wood distillation. When exposed to air, it dries out and becomes brittle, losing its elasticity and tensile strength. This makes tarred bankline a poor choice for hammock suspension, as the dried-out tar can snap or break under load, causing the hammock to drop.
Inspect and Test Before Use
If you still want to use tarred bankline, inspect the cordage carefully for signs of drying or damage. Perform a tensile strength test by stretching the bankline to its breaking point. If it fails to withstand a 20-25% load (approximately 10-12 kg or 22-26 lbs), it’s not suitable for hammock suspension.
Safe Alternatives
Consider using alternative cordage materials like nylon, polypropylene, or natural fibers like cotton or jute. These materials are more resistant to drying and can withstand heavy loads. For tarred bankline, consider using it for temporary or low-load applications, or for tasks where accidents won’t cause serious injuries, such as securing a small tarp.
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