According to the space, it can be divided into indoor stairs outdoor stairs. The indoor stairs, which have been explained clearly, are used in various kinds of residential interiors. Because of the pursuit of indoor beauty comfort, the indoor stairs are mainly made of solid wood stairs, steel wood stairs, steel glass, reinforced concrete, etc. a variety of mixed materials. Among them, solid wood stairs are the most widely used stairs in high-end residential buildings. The steel glass mixed structure stairs are used in modern office areas, office buildings, shopping malls, Exhibition halls are mostly used, reinforced concrete stairs are widely used in various complex buildings. Considering the wind, rain, sun other natural factors, the outdoor stairs are generally suitable for beautiful solid wood stairs, steel wood stairs, metal stairs, etc. reinforced concrete stairs various stone stairs are the most common.