This page provides specialized rigging charts, complex load calculations, and detailed guidelines for advanced rigging operations. Designed for experienced riggers handling challenging lifting scenarios.
When lifting an object with multiple lifting points, it's critical to understand how the load is distributed. The Share of Load Formula helps riggers calculate precisely how much weight each lifting point will bear.
The share of load on each lifting point is inversely proportional to its distance from the center of gravity.
This formula calculates how load is shared between multiple lifting points. The farther a point is from the center of gravity, the less load it will bear.
This diagram shows an L-shaped object lifted by a spreader beam with two vertical slings of different lengths. The share of load at each point is calculated using the distance from the center of gravity.
When rigging a load with level pick points but using different sling angles, the tension in each sling will vary. This formula helps riggers calculate the exact tension in each sling based on geometry and load weight.
When pick points are at different distances from the center of gravity, the sling tensions vary based on the angle and distance of each sling.
The formulas account for both the horizontal distance of the pick points and the length of the slings. The tension in a sling is directly proportional to both the opposing pick point's distance from center and the sling's length.
This diagram shows a lifting scenario with two slings at different angles lifting a level load. The tension in each sling is calculated based on the geometry of the setup and the load weight.
When dealing with stepped loads or loads with pick points at different heights, this formula helps calculate the tension in each sling, taking into account both horizontal and vertical positioning.
When pick points are at different heights and horizontal distances from the center of gravity, the sling tensions are affected by both the horizontal distances and the vertical heights.
These formulas account for both the horizontal distances and the vertical heights of the pick points. This is critical for stepped loads where pick points are at different levels.
This diagram shows a stepped load with pick points at different heights. The tension in each sling is calculated based on both horizontal distances and vertical heights from the hook to the pick points.
We're continuing to expand our advanced rigging resources. Check back soon for more detailed content on:
Detailed calculations and coefficients for dynamic load factors in various lifting scenarios
Coordination protocols and load distribution calculations for tandem and multi-crane lifts
Advanced equalizer beam configurations for distributing loads across multiple attachment points