So I have lots of 3' and 6' polyester roundsling s, but I really need a couple of ~9' footers to wrap a certain piece. No problem, just "tie" them together end-to-end right? It's harder to explain than to demonstrate, but what one ends up with is basically a square knot. Just with no dead-ends.
![proxy.php](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Now someone told me I had to derate due to the square knot. Interwebs says effeciary of a square knot is ~45%. So I take my 5300 lb. Spanset, multiply it by 0.45 and get 2385 lb. Is that right? Does it matter if it's Gac-flex? I think it's actually stronger than a normal square knot, in that all four ends are being pulled equally. Yes/no?
Professionals please refrain for one week. Thank you.
![proxy.php](https://www.controlbooth.com//proxy.php?image=https%3A%2F%2Fthumbs.dreamstime.com%2Fz%2Freef-knot-yellow-blue-ropes-isolated-white-background-81321826.jpg&hash=2acfcd7f94a9f13dc1e8fc75407d4c82)
Now someone told me I had to derate due to the square knot. Interwebs says effeciary of a square knot is ~45%. So I take my 5300 lb. Spanset, multiply it by 0.45 and get 2385 lb. Is that right? Does it matter if it's Gac-flex? I think it's actually stronger than a normal square knot, in that all four ends are being pulled equally. Yes/no?
Professionals please refrain for one week. Thank you.