L Shaped Stairs are typically two stair flights that connect at a landing or by winder treads that create 90° turn. These are most often used when space is more limited and a full straight flight cannot fit. The landing or winder tread area of the stair may be centered between the two straight flights or nearer the top or the bottom. Winder treads are pie shaped treads that increase the number of treads in the “landing area” usually used when space is even more limited.