It should be as simple as "divide by 4", assuming that the load is spread perfectly equally.
The core can't take 44 lbs though. I guess my point is that there's a lot of room for improvement in that TIM joint, and that we just can't get to it
(Ok now ya'll
don't even try to tell me that you've got it clamped to 50 lbs, and that it's perfectly safe, OK?
)