How this works: as sling legs flatten out, each leg carries more tension for the same load, so the arrangement's capacity drops with the sine of the angle from horizontal. We multiply effective legs × WLL per leg × sin(angle). Angles below 30° are dangerous and outside normal practice.
Enter valid inputs to check the arrangement:
- Enter a load weight greater than zero.
- Enter the WLL per leg greater than zero.
General guidance only. This tool gives indicative results from the numbers you enter. It is not engineering advice, a compliance assessment or a substitute for a competent person, AS 2550 requirements or your crane manufacturer's documentation. Verify anything safety-critical with a qualified professional before acting on it.
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