For cerana, I use boxes, stacked one upon another, with no moveable frames, and use piano wire to separate and harvest. Mine are square, but any shape will do. They are essentially a step up from log hives - which cannot be added to, nor easily harvested from. I create a top-grid, and paint it with melted wax. I can always insert additional layers above the bottom section (which includes options for a screen, a front door for cleaning, and of course the entrance) but below the bottom of their ever-lowering comb. In each layer, I do insert one set of cross members (BBQ skewers, or bamboo) in an x-configuration to support the comb, just in case I pull off a higher layer box too soon and cause the lower comb to fall.
Advantages are that this type of hive doesn`t need as much maintenance so is good for far away apiaries, is section-lighter than a log, uses scrap lumber, and is simply different.