I dont get it-what are you trying to do catch a fisher with a foothold set in an elevated box??
If so,fill the box with bait then chop a notch in the log to bed the trap(where the fishers feet are in the pic) to set the trap on.
Better check your regs most places its illegal to set footholds in trees.
Yes to catching a fisher with a foothold in an elevated box. Reason(s) are to better the chances of not catching dogs and/or reducing the chance for other animals, lessen the chance of snow putting the trap out of commision (CHRISTmas 3 years ago had 3' of snow that day), cover from freezing rain we constantly get and restrict the approach (different videos have them getting onto logs even though no trees in close, close enough to just get onto like would normally expect...following tracks once in the snow measured 7' between tracks from ground onto a fallen log) for just a few reasons.
Reading the PA regulations book there is no mention of elevation (trees) of footholds.
Thanks for the advice though. Will try getting an answer from the local PGC. I know the answer can also be interpreted differently by the PGC officer in different Wildlife Management Units (WMU's).
Like said may put some dirt holes in but for this year am only setting for fisher and beaver.
Think that is the majority that comes to mind real quick.
Edit. Contacted PGC (Pennsylvania Game Commision) for my district and after they couldn't understand it was for a foothold and not body grip (they kept repeating what is said for bodygrip and kept telling them foothold) they finally transfered me to the head guy. He said yes setting in a tree (told him leaning pole about 4' up) was legal along with no restriction to being 50 sq. inch opening.