It's hard to do the Relevant equations & The attempt at a solution as I know very little in physics. So I'll stick with the 1st part of template. 1. The problem statement, all variables and given/known data Attached is a drawing of the basics of my issue. It's a stack of planks at 45° with 45° wedges, making the former snug the surfaces ; then nails are ran at 90° through the planks aligned so they arrive at the wedges right angle. What force would be applied on the surfaces at different heights (different hues of orange)? In other word, if you'd cut the nails at the wedges right angle, then put a scale between the wedges and the surface, what kind of numbers would the scales show? Again, I'm very green at physics but to be the bottom end would have more weigh then the top one. Please simplify as much as possible and don't bother too much for the detail, don't be afraid to use ranges. As long as the general idea is explain, I'd be happy with that. So to me, the bottom would get 2/3-3/4 of the weight, toward the upper range. Thank you kindly PS: Hmm! Perhaps I was wrong to nail the planks like that. See attached smaller image. Perhaps the nail should enter upright in the planks, so at 45°, then go through the wedge along one side, and perhaps around where areas from both side would be about the same ; . That make more sense. But that's likely just a structural issue, one not lasting longer than the other, and won't affect the main point: forces on the surfaces (hues of orange). PPS: Perhaps the nails shouldn't get out of the wedges at all. I've highlighted the former to emphasize that.