They definitely are handy for all sorts of stuff, I'm glad you have a use for them. If you can, please post how you are making those because they're different from the "normal" ones
Rigging is one of those things that is complicated enough, but it's often made more complex by all the different little rules and historical stuff like nominal size strengths. One of the many reasons why we don't need the metric system :lol:
Us cargo control is for tying down stuff, aka 3 to 1 load limit for trucking tie down. Overhead rigging is 5 to 1 for static applications. Here's the crosby screw pin, pretty standard rigging shackle. Notice they are very conservatively rated. This is from the convention of having a set...
They aren't rated higher than steel shackles, steel shackles have a 5 times higher breaking point than the value they say on them. From what I've read about them they have a rating the same as the size they are made from, so if you have a half inch amsteel one it would have the same breaking...
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