Why? The weight for moving boxes around, 4.8 - 5.2 lbs honey / medium frame.
After I got back from fishing yesterday am I got a call from one of my Hive Hosts, Ann that her bees had swarmed.
When a honey bee swarm emerges from a hive they do not fly far at first. They may gather in a tree or on a branch only a few yards from the hive. There, they cluster about the queen and send 20 - 50 scout bees out to find suitable new nest locations.
With the bees now in their new hive box the trick is to keep them from swarming again. A few frames of honey and a frame of larva should do the trick.