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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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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