The strength of a wire rope is compromised when it is bent over a sheave or a pin. This is measured by the (Diameter of the bend / Diameter of the rope).
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This guide breaks down the fundamental calculations every rigging engineer needs, providing a "digital handbook" of the math that keeps heavy lifts stable. 1. Estimating Load Weight Often shares free rigging posters and calculation cheat
The foundation of any rigging plan is knowing exactly how much you are lifting. If the weight isn't on a manifest, you must calculate it based on the material's . The Formula: Weight (W) = Volume (V) × Density (D) Steel Density: ~490 lbs/ft³ (7,850 kg/m³) Concrete Density: ~150 lbs/ft³ (2,400 kg/m³) Water Density: ~62.4 lbs/ft³ (1,000 kg/m³) 2. Sling Tension Calculations