There is a type of hive, called, I believe, a Kerkhoff Hive (though I may be spelling the name incorrectly). It is a good honey producer as it has two hives, with two queens, side by side, with opposite facing entrances, but shallows on top to which both hives contribute. (Obviously, the colonies are separated.) I have worked a group of six such hives, and after starting them with the usual 3,000 bees this past May, each hive had an impressive surplus of honey last week. The trouble is, I cannot find plans for the hive, or even the correct spelling of the hive. I suppose I could go back to that yard and measure, pull apart, etc., but if this rings a bell with someone, please do share your fountain of knowledge.
Thanks.