technical · 8 min
Rope, hooks, and hitch math
Running rope: broken wires, kinks, crushing, corrosion, diameter loss — retire it when it hits the criteria, not when it looks ‘still pretty good.’
Rotation-resistant rope hides core damage. Inspect it like the manufacturer says.
Sling angle: the flatter the sling, the more tension. 30° is not 60°.
Choker derates. Basket can rate higher if it is actually a basket. Hardware wants to be loaded in line.
Topic: 1926.1413 / B30.9
Independent study product. Not affiliated with, endorsed by, or a substitute for NCCCO or CCO certification. NCCCO and CCO are trademarks of their owners. Training load charts and the 3D lift tool are generic and must not be used for actual lifts.