This isn't hollywood - her foot would break long before there is any weakening of a piece of graded 3x3.
The fork was probably cheap metal too, probably bend in a tough steak let alone picking through a piece of construction grade timber.
Now, using the bed frame as a lever though....:p
3"x3" C24 timbers at 9"crs (set in the US so I'm going imperial) over a 7' vertical span. That is a tough break. I'll bring a length with me tonight, meet you outside the West Stand at 18.30 to see how you get on...
I've seen the film on Prime - really enjoyed it!
First thing that hits you is the quality of the cinematography, every frame feels like added value to the film, from the woods, to the detail in the wood of the cage, loved the depth of field shots too. There is a real love in the composition...