I'm on my phone and am tired (managing an architectural practice and a farm is a lot to do during summer) so I didn't ask my question correctly: how does a 90 degree corner induce enough additional stress to produce a failure and does it matter if the loads are uniform vs concentrated and applied in which axis (X or Y)?

JYD #123 The great one formerly known as Architect.

I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.