What is the name of bracket type where a shelf sits in a closet or space between two walls but only flat wooden bars screwed into the wall on each side are holding it up rather than brackets? And what is the trick to doing these? A certain type of wood? A ratio of weight to thickness? Thanks for any help. I don't even know what to call these when I search.
I've got an alcove with a door and I'd like to put a shelf above the door and in another part of the alcove. Walls are pretty close together, maybe 75cm - 1m.