I'm slightly reluctant to share this floor plan because, as I mentioned above, it's an incomplete concept.
It also omits much detail. You can see the (D) in the upper left corner. Floor plan sketches A, B & C also form part of the concept but they're not shown here as they don't shed any light that will show Bob the half-floor idea.
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The circles are the tree stump staircase the hens will climb to reach the perch, floor and roost.
Before anyone points it out, the roost will be a tree branch. The people who provide firewood are going to let me choose from some branches.