Stairs come in a number of styles, and their use is determined by both design aesthetics and the plan's requirements. A regal impression can be achieved with a spinning staircase, while a scissor staircase can be employed to conserve room. Stair floor plan symbols with a succession of parallel lines and an arrow indicating which direction is "up" depending on which level you're looking at are known as scissor stair symbols.
Straight stair: The symbol for straight stairs is a rectangle with parallel lines.
Curved stair: A curved shape with parallel lines is used to symbolize a curved staircase.
Winding stair: The winding stair turns 180 degrees to ascend to the next level.