just use plexi-glass.
Fix it to the bottom rung on the 'back/inside' side with conduit clamps. As you
raise it up use a ladder to fix the top so it stays.
If you can visualize 3 'pedals' of a flower, fixed at the bottom. as you
'close' the flower clamp it off at the top, out of reach.
The pleix-glass wont rust, can be painted, not electrical and smooth enough so
as to be not climbable.
You must remember, its only a deterrent. Nothing short of a guard will be 100%.
Just an opinion.
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