This is my first top bar hive design. This hive body is the standard Langstroth hive width. The interior length is 38-1/2" with allows for 30 bars; twelve 1-1/4" wide Brood bars, four 1-3/8" wide Drone bars, and twelve 1-1/2" wide Honey bars. There are three hinged viewing windows with latches. The entrance is a routed slot, 3/8" x 10" on the front end. The gable roof is removable and ventilated. I am planning on using a small bungee cord between two screw eyes on each end to hold the roof in place from being dislodged by wind or bumping. The bottom is fully open and covered with #6 hardware screen for ventilation and to allow mites and debris to fall through.
I have designed top bar "open frames" using 3/4" dowels and a 1" wide bottom bar to use instead of just a plain top bar. They have a 1/8" groove on the top and bottom that can be filled with beeswax to hopefully help the bees keep the combs straight and aligned.
The stand is 36" high to raise the hive body to a convenient working hieght for the average height adult. The height can be easily modified to fit the user. There is a sliding tray built into the back end of the stand. The tray can be lined with white sticky paper to use for checking mite levels, or a shallow pan filled with oil can be placed on the tray for use as a small hive beetle trap. The tray can be left off during warm weather for full ventilation or slid in place during colder weather to help stop drafts and maintain warmth in the hive.