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I have taken apart structures made from 3/4" ACX ply and 2X4 held together with 7d nails in both ring and screw shank. The ring shanked nails were a bit harder to pull but once they broke free, they came out pretty easy. Screw shanked nails were hard to pull until they were almost all the way out. The plywood could not be pried or driven apart from the 2X4 without destroying the wood, each nail had to be removed with a slide hammer nail puller or cut with a sawzall. If you need specific pull-out data, check with the nail manufacturer. I have also seen charts in carpentry texts but these usually just cover pull-out and shear for smooth shank nails.