Before a crane even hooks onto a load, the rigging engineer must ensure the ground can support the crane's weight plus the load. GBP = (Crane Weight + Load Weight) / (Outrigger Pad Area)
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Often shares free rigging posters and calculation cheat sheets. Before a crane even hooks onto a load,
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 If the weight isn't on a manifest, you
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).
Where SAF = 1 / Sine(Angle)