What are the steps of the stairs?

Steps refer to stepped steps that are set in contact with indoor and outdoor floors or different elevations on the same floor. It is a stepped connecting member for people to walk on the ground with different elevations at the entrances and exits of buildings or on the same floor with different elevations. The outdoor steps also include a platform connected with the entrance and exit of the building.

Stair is a building component used for vertical traffic between floors, which consists of continuous walking steps, rest platforms, railings (or handrails) for maintaining safety, handrails and corresponding supporting structures.