The Shotgun house is a narrow one-story dwelling without halls. Each room is placed behind the other in single file. The roof ridge is perpendicular to the street. The traditional description of why these houses are called "shotgun" is that if one fired a shotgun through the front door, the shot would pass through the lined-up doors of each room and out the back door. This description does not really fit most shotgun houses, because the doors of the successive rooms don't usually line up.