Here’s a Google Sketchup design for a simple top-bar beehive.
Some pics:
Notes:
Only 2 measurements really matter in the design of a top-bar beehive: the angle of the side panels (70 degrees) & the width of the top bars 35mm. They both pertain to bee behavior and this design has them both optimized. From what I gather, other measures are quite forgiving.
This design is simple & well researched, I do not know yet how it will fare in practice, more to come on that.
Material:
All you’ll need as far as wood is concerned is a couple of 2x12x16 and a 3/4″ sheet of plywood:
Lastly, all units are in millimeters but based on standard lumber sizes available at the hardware store.
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