Is Tarred Bankline Strong Enough for Heavy Loads?

Tensile Strength of Tarred Bankline

Tarred bankline, a type of cordage made from natural fibers like hemp or manila, is often used in sailing and rigging applications. When tarred, the cordage is coated with a waterproofing agent that helps protect it from the elements. However, tarred bankline typically has a tensile strength of around 300-400 pounds (136-182 kilograms) per inch of diameter, which is relatively low compared to other types of cordage. For example, a 1/4-inch (6.4 millimeter) diameter rope made from synthetic materials can have a tensile strength of up to 2,000 pounds (907 kilograms) per inch.

Applications and Limitations

Tarred bankline is often used in applications where its relatively low strength is not a critical factor, such as in sailing rigging or as a tow line. However, it should not be used for heavy loads, such as lifting or hauling equipment, as it can stretch or break under excessive tension. In addition, tarred bankline can be prone to tangling and knotting, which can reduce its effective strength and make it more difficult to handle.

Alternatives to Tarred Bankline

For applications where heavy loads are involved, it is generally recommended to use a stronger type of cordage, such as a synthetic rope or a wire cable. These types of cordage have much higher tensile strengths and are better suited for heavy loads. Additionally, they are often more resistant to abrasion and wear, which can help extend their lifespan and improve their overall performance.