I am trying to address rigging safety in our plant. typically we use chains connected as an endless loop. the chain routed over the hook, through the d ring, and hooked to itself with a standard not supporting grab hook. It occurs to me that I am unsure how to de-rate this setup. I have 2 conditions, 1 is the D ring is 2.5 D/D of the chain, which in a basket scenario reduced the rating to 60%. But then you also have the chain hooked to itself. I'm not exactly sure how to measure this angle but its steeper than the typical choker pictures on the internet. Im aware that this isnt a true basket scenario so you dont get a doubling of capacity. could anyone help shed some light here.