I've been looking at the corner joint that everyone uses for hive boxes. There are box joints (finger joints), rabbet joints, butt joints, mitre joints, lock mitre joints. It is a forest of choices. I never saw this kind of joint but thought that the pros and ease of construction out weighed any cons. It has as much end grain exposed as a box joint, but just redistributed. It is also very easy to cut on a table saw. The other plus is that when you put the frame rest on the same side as the hand hold, you aren't stressing the joint at all with the weight of the frames.
So..they say a picture is worth a thousand words.
Uploaded with
ImageShack.usEdward