![]() The idea is so people actually doing the work can understand how to figure the new sling length. If possible can we leave out the beta's and alpha lingo since all it requires is simple math equations. I have been using excel to generate lift plans for 6 years and I would like help for this equation. This is for hoisting equipment where the load on each sling is calculated from the vendor which in turn gives an accurate center of Gravity. What I am trying to figure out is how to make it so I adjust the 4 lower vertical sligs by adding shackles to come up with the CG adjustment. I have been using a CG calculation that adjusts the Y part of the upper spreader bars to move the crane hook over the center of gravity. ![]() On another note I am trying to figure out the equation to adjust the vertical slings on a 4 point pick with 3 spreader bars. You can input the Weight and angles and it will calculate the tensions. I have made this simple spread sheet to calc it. ![]() ![]() Itwas what is the tension on a sling with the load and angle known. There was a question in a thread that is now closed but there was no solution to the Rigging question that was asked.
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