I'll be starting my first topbar hive this year. I was considering making some frames for it as they can serve several useful purposes, such as introducing cut-out comb, repairing fallen comb or just getting the bees started right before introducing regular top bars. I played around with it a bit and came up with a jig to fabricate uniform size frames. Once the jig was finalized I was able to turn these frames out very quickly. I did a "destruct" test on a frame and they are really strong (used 1" narrow crown staples with TiteBond III)

You can see some photos here:


These frames incorporate a triangular comb guide. In effect, I can't see how they would be any different from a standard lang foundationless frame except for the shape. I'd appreciate any thoughts on this design.

Cy Brewster