Did you mean the doors that are usually on cellars?
They are usually low on the ground, and mostly horizontal, though they might have a slight incline.
There are usually two doors on one set, and they can be locked from the outside in some way--maybe a wood beam across, or a padlock on some sort metal hardware to keep the doors together.
Directly inside the cellar doors is usually a staircase to get down into the cellar itself.
So, all that said, were you trying to describe the "cellar door?"
"You take turns, advise and protect one another, even heal or be healed when the going gets too tough. I know! That's not a game--that's friendship!" ~Shelly Mezzanoble,
Confessions of a Part-Time Sorceress: A Girl's Guide to the Dungeons & Dragons Game Darcy\'s Place
