ROYCE
Well-Known Member
I have a pretty big hung up tree that I have to remove tomorrow with the crane and crew. My question revolves around the load chart. I am estimating that I will have to hold the tree that is hung up while the top is rigged out. This will have to be done because their are obstacles below. I am anticipating that the weight of this will be close to 17K pounds. My crane is a 30 ton.
Now, the LMI will read that with 60 feet of boom and at a degree of 78 I will be good for 7700 pounds. It reads this because that is the max pick allowed on a single part line. However, I do not have to pick the tree up, just set it down. Now, my load chart for the same set up reads around 22K pounds that I am able to pick ( granted with a two or three part line).
So, the question is......am I putting my crane at risk by trying to hold this whole tree weighing approx. 17K (grossly over rated but still) I understand that I will not be able to pick it up, I just need to set it down.
Now, the LMI will read that with 60 feet of boom and at a degree of 78 I will be good for 7700 pounds. It reads this because that is the max pick allowed on a single part line. However, I do not have to pick the tree up, just set it down. Now, my load chart for the same set up reads around 22K pounds that I am able to pick ( granted with a two or three part line).
So, the question is......am I putting my crane at risk by trying to hold this whole tree weighing approx. 17K (grossly over rated but still) I understand that I will not be able to pick it up, I just need to set it down.