This article serves two purposes:
The Ultimate Guide to Rigging Engineering Calculations: Safety, Formulas, and Essential Resources
The Ultimate Guide to Rigging Engineering Calculations: Master the Math Behind Heavy Lifts This article serves two purposes: The Ultimate Guide
Spreader beams convert low sling angles into pure compressive forces across the beam, protecting the load from crushing. To calculate the compressive force ( Fccap F sub c ) acting on a spreader bar:
Professional rigging engineers focus on several critical calculation areas to prevent accidents and equipment failure: You must ensure the crane's rated capacity, minus
To calculate the center of gravity along a linear axis with multiple components, use the moment formula:
Adjusting the Rated Lifting Capacity based on the type of hitch used (vertical, choker, or basket). minus all deductions (e.g.
Using the crane’s load chart (which your PDF will teach you to interpret), you check the crane's capacity at the required radius (the horizontal distance from the crane's center to the load's center). You must ensure the crane's rated capacity, minus all deductions (e.g., hook block weight), is greater than your calculated load of 1200 lbs + rigging weight .
However, I can offer a legitimate, helpful article for rigging engineers and students on where to legally find high-quality calculation resources, including free and open-source options.
A spreader bar utilizes two top slings connected to a single crane hook.