![]() Using the example above, letÂ’s find the breaking strength of a piece of ½” nylon line. X circumference 2 = breaking strength)įollowing is a comparison factor chart for synthetic lines. Since synthetics are stronger than manila an additional multiplication step is added to the formula above. As mentioned above, a comparison factor has been developed to compare the breaking strength of synthetics over manila. To calculate the breaking strength of synthetic lines you need to add one more factor. (.5 X 3.14 = 1.57) Then using the formula above:ġ.57 2 X 900 = 2,218 pounds of breaking strength To convert use the following formula.Īs an example, if you had a piece of ½” manila line and wanted to find the breaking strength, you would first calculate the circumference. However, for purposes of the USCG license exams, all lines must be measured by circumference. When you purchase line you will buy it by its diameter. The basic breaking strength factor for manila line is found by multiplying the square of the circumference of the line by 900 lbs. Synthetic lines have been assigned “comparison factors” against which they are compared to manila line. Natural breaking strength of manila line is the standard against which other lines are compared. How Do You Measure Rope Strength?Įach type of line, natural fiber, synthetic and wire rope, have different breaking strengths and safe working loads. Here’s all you need to know about rope strength. Each of these measurements has different uses, and here we’re going to give a brief overview of what’s what. ![]() Both of these are important measurements, and it’s worth learning how to measure and understand them. One boater will talk about tensile strength, while the other will talk about working load. ![]()
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