I'm not sure what you mean. Using the Nicot system, I attached my cell cup holders to a regular top bar, and with the grooved top bar (not the wedge) you can nail those little brown round things right to it.
The top bar sits in my cell builder like a regular frame.
I added side bars to keep the top bar spaced right.
I used a medium cell bar frame. I cut the height (thickness) of the top bar down to 1/2" before assembling the frame. I put the brown cell cup holders on the bottom side of the topbar for one row, and then installed a second cell bar which was 1/8" plywood ,....the top of which was 2-3/4" from the bottom of the topbar. In other words there's 2-3/4" of space between the two cell bars, and 2-1/2" of space from the 2nd cell bar to the bottom bar of the frame.
I put 10 cell cups on each frame centered within the middle, and the bees have built comb at the edges between the outer cups and the sidebars.
In a deep frame I guess you could space them 2-3/4" apart leaving plenty of room above the top cell bar for them to build comb.
Thanks for the replies and pictures.
using a deep frame I put about 1 1/2" plastic foundation above my first bar and centered lower bar below. giving me about 3".
think I'll make another with a sliding removable bar like some of you have.
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