In architecture, it is used as a component of vertical traffic between floors. Used for traffic contact between floors and when the height difference is large. Multi-storey and high-rise buildings with elevators and escalators as the main vertical means of transportation should also be equipped with stairs. Although elevators are the main vertical means of transportation in high-rise buildings, stairs should still be reserved for escape in case of fire. Stairs are composed of continuous steps (also known as ladder running), platforms (rest platforms) and enclosure components.