Quick Answer
Cordage made from bast fibers can support heavy loads, but its strength is dependent on various factors, including the type of plant, the extraction and processing methods, and the knotting technique used.
Bast Fiber Extraction and Processing
Bast fibers are extracted from the stem of plants, such as nettle, flax, and hemp. Effective extraction involves soaking the stems in water to break down the pectins that hold the fibers together. The soaked stems are then beaten to separate the fibers, followed by a series of rinses and drying processes to remove any impurities.
Cordage Strength and Load Support
The strength of cordage made from bast fibers is measured in terms of its tensile strength, which can range from 200 to 1,000 kilograms per square centimeter (kg/cm²). To create a strong and durable cord, it’s essential to use a reverse wrap technique, where the fibers are twisted in a reverse direction to create a more robust and resistant cord. A 15:1 reverse wrap ratio is a common technique used in cordage making, where 15 wraps are made in a clockwise direction, followed by one wrap in the counterclockwise direction.
Knotting and Load Distribution
When supporting heavy loads, it’s crucial to use secure knots that distribute the weight evenly. A well-made bowline knot, for example, can support loads up to 4,000 kg (8,800 lbs). To achieve maximum strength, it’s recommended to use a combination of cordage and natural fibers, such as rope wrapped around a wooden dowel, to create a more robust and load-bearing structure.
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