Friday, October 09, 2015
Four leg bridle configurations
YouTube: When 4-leg sling systems are rigged incorrectly, it may create a worst case scenario of two slings supporting the entire load while the other two slings serve to help balance the load. Many believe that this phenomenon always takes place as loading changes throughout the movement of the load.
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This is a cool video, and it does nicely demonstrate some important points to keep in mind for those of us who are going to involve ourselves with overhead rigging. What I liked about this video was not only did he attach force gauges to each of the points in question, we got to see how the load reacted n the different configurations. It was also interesting to see the differences between the different materials lifting the load, how the chain reacted differently than the wire rope sling. Though there was a distinct difference, that factor is something that wouldn’t have crossed my mind until it posed an issue, and I’m curious as to the other structural differences there are between systems with chain and systems with wire rope. I would like to watch a video like this in a classroom setting where a professor was explaining the different ways these configurations react, pointing out what to avoid and what to aim for.
When I didn’t know much about tools, or why we always needed to use one more line or chain on an object. It just never really occurred how the load distribution played out. Seeing the various sling configurations bearing a load, and how that load can be distributed at any given time, throws a little caution into the wind. By taking a look at what is a safe load distribution, and comparing that to one that is off balanced; it can create a bit of havoc on a larger scale if not done correctly. It doesn’t just stop at loads on a sling, it is useful for almost any form of transporting goods in a vehicle. If you’re going to strap something down in the back of a truck, you don’t want it to be loose, because then it gives a greater risk for the object to get thrown around or even flying out of the back. It should almost be commonsense as to the types of loads you should have, and how those loads she be distributed. Everything has a breaking point, just don’t let it be you that breaks.
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