How to describe the structure of the hotel stairs

Staircase from the form of straight ladder, curved ladder, rotary ladder, etc.; from the material of all-wood staircase, all-steel staircase, steel and wood staircase, iron and wood staircase, steel and glass staircase, marble staircase and so on. Straight ladder is the most common and the most simple, geometric lines, a strong sense of direction, the center have a platform. The "zigzag" straight ladder is the most convenient and smooth, but it occupies the largest space area; the curved ladder can realize the connection between the upper and lower floors with curves, and it can be changed into various shapes according to the space, and the style is beautiful, and there is no hard corner of the straight ladder, which makes it more comfortable to walk up but occupies a larger area; the rotary ladder occupies the smallest space, and the curves that are circling up are beautiful and moving, but it is not convenient for the old people to use. The rotary ladder occupies the least space and has a beautiful and moving curve, but it is not convenient for the elderly, children and up and down to carry things.

The building as a vertical transportation between floors with components. Used for transportation links between floors and when the height difference is large. There are elevators, escalators as the main means of vertical traffic in multi-storey and high-rise buildings should also set up stairs. High-rise buildings, despite the use of elevators as the main means of vertical transportation, but still need to keep the stairs for escape in case of fire. Staircase by continuous steps of the ladder section (also known as ladder run), platform (rest platform) and enclosure components and other components. Stairs of the lowest and highest step between the horizontal projection of the distance for the ladder length, the total height of the ladder for the ladder height. China during the Warring States period on the bronze image of the heavy house has been engraved with a staircase. 15 ~ 16 century Italy, the indoor staircase from the traditional closed space to liberate, so that it has become a rich change in form with decorative architectural components.