/diy/ - Do It Yourself

In cases like this where one has a sudden large 90 degree overhang, intuitively I can't imagine that this part of the structure could possibly support itself while being built.
However, this is a tall piece, and it has one of these on both ends so I can't just put it against the bed, and it also has screw threads which I don't think would print correctly if I laid it on its side. If I'm wrong about that, please let me know.
But otherwise, do I have any option except to essentially encase the entire thing in supports?