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BAretired - your response was helpful and is much appreciated. The OSHA spec makes no mention of plastic bending. Seems to me it should be permitted with such a high sf, but once again, I've been "told" it is not permitted in this application. The structure has a bolt bending problem. Do you...

Yep. A miss. 1) it was a peer, not a boss. 2) if i had an mfr rating I wouldn't need to analyze it, would I? This is an in-house manufactured sling.

Hello All, I have been tasked with doing structural analyses of overhead lifting slings. They are for lifting ~10,000 Lbs in a factory setting. I've been "told" that the requirement is SF = 5.0 for the entire assembly: I-beams, lugs, bolts, bearings, wires, welds... every little detail...