Posted by IA ROY on September 07, 2016 at 16:14:21 from (72.168.160.8):
In Reply to: Chain hoist beam? posted by tomstractorsandtoys on September 07, 2016 at 16:00:06:
You need to have an engineer run the calculations for you. Strength is one matter, and deflection is another. How you mount it is also a concern. Deflection is probably not that much of an issue with your application. Make sure there is at least a 2 to 1 safety factor. Figure it needs to hold 8000# to be safe at a 4000# load in the center of the span. If it fails, someone's life is in danger, maybe a child or grandchild! The trolley is not as important an issue with safety. However have a backup plan if one of the wheels fails. A loop over top of the beam would probably take care of things.
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