Originally Posted by William Lai
Thanks Mark for the info and link. The context of the chair is very interesting to me, and I particularly like your analogy of it back to the world of woodworking.
Regarding the joinery on the Z chair, can you elaborate on the wedge piece's structural function? I don't think I understand what you meant about it taking away the torsion of the chair. Focusing on the seat joint for the moment, it seems that the joint will want to rotate around the top corner of the wedge as weight is put on the chair, and while certainly having a larger connecton helps strengthen the joint, I am not sure how it changes the nature of the stress.