Date: Around 1993
What is the strongest geometric shape when it comes to bridges?
Now you are getting into the kind of specificity that is
necessary. Woods greatest strength is against compression along the growth
axis. The way trees grow is the best evidence for this fact. So the
strongest figure out of wood would be one which carries most of the load as
compression and not bending of the members and is stable. Anything built out
of triangles would be able to transfer a force in almost direction into forces
along the sides without collapsing the figure. Some other kind of material
might indicate a different kind of figure.