I was curious and thought of one way to play with the angles of the pole to see what the forces do, look at what happens not only to the pole but also the guys and anchors, pretty impressive.
Another ratio that comes to mind, in the NDS "the slenderness ratio for solid columns shall not exceed 50 except that during construction l/d shall not exceed 75."
The rapid stress increase when the gin pole is lowered kind of makes me think the angle changed between Craig's lifts but it also made my mind wander, perhaps down a rabbit hole. Dry timber is roughly twice as strong as green but I also know the supple strength of green timber. Load goes to stiffness. There is nothing tougher than a dry knot and this is also the location of weakness. In a green, softer, timber does the stress flow around defects more uniformly?
