Mindy03,
In response to your question of Aug 5, 2013; The top bar hive is indeed sloped on the sides. The width of the top and bottom as well as the overall depth of the box are varied according to local weather considerations. Warmer climates dictate wider and shallower hive boxes than would be acceptable in a cooler climate for the reason Dave mentioned. The TBH boxes are opened from the top as the cover simply is lifted off of the box.
Ranedie,
Am I seeing "Starter Strips" of wax in a dadoe at the bottom of those top bars? That's a neat touchI've not seen from anyone else!