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Video instructions and help with filling out and completing Why Form 8815 Calculators

Instructions and Help about Why Form 8815 Calculators

Today, we're going to learn about how to calculate the load on each sling when we make a lift. We can take the guesswork out of it by looking at four easy steps. We know from the strap the safe working load of each of these is right on the tag. Here's an example of what you might see on a strap tag. One of the things you need to know is the vertical safe working load of the sling, and that can be from the tag that's right on the sling itself. The angles of the slings are not always just 45 degrees or 60 degrees, so to figure out the stress that is on each of these slings, we just need four things. One thing we need to know is the vertical safe working load of each strap. The second thing is the weight of the object you're lifting, the total weight. The third thing is going to be the length of each strap, and that's from the hook to the connection point, so that is the length. And the last thing is the distance or the height above the load that the hook is. So, here's how we go about calculating the force on each sling. Divide the leg length by the vertical height that the hook is above the load. So we're going to take L divided by H, that's the first step. Then the second thing we do is take that answer and just for practical purposes, we will call that X. And we will take that answer X and multiply it times half of the weight. The answer to that is how much force is exerted on each of these sling legs. That means there's that amount of force on this sling as well...