Mechanical puzzle?
Looking for the simplest, most clearly expressed answer to the following. Design the fittings that attach one end of a horizontal beam to a vertical wall, such that the system has the following characteristics:
When unloaded, the beam is horizontal.
When loaded with a weight at the tip, beam is horizontal (with some bending).
When loaded with the same weight at the root, beam detaches from the wall.
Beam and wall fittings are rigid one-piece devices, one welded to the beam, one to the wall; thus no moving parts like levers, springs, etc.