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A spiral staircase is often referred to as a spiral or spiral staircase. The spiral staircase is a general term for all curved staircases. Some people say that a staircase that rotates more than one turn is called a spiral staircase, and a circle below a circle is called a curved staircase. This is not accurate. As long as a staircase rotates along a rotating shaft, whether it is 30 degrees or 360 degrees, it should be called a spiral staircase.
Some stairs are curved, but they do not have a fixed rotating shaft, such as hyperbolic bending, parabolic bending, etc. These non-closed curved curves generally do not form a rotating shape independently, and often cooperate with a rotating curve. A compound curved staircase with a rotating axis curve and a non-rotating axis curve as a supplement is formed, so we usually refer to all curved stairs as spiral stairs.
The most beautiful spiral staircase in the hall is generally rotated from 100 degrees to 120 degrees. The width is narrower and narrower, and the ratio is 4 to 3 to 3 to 2. The general step height of ordinary residential marble spiral staircases is between 150 and 170 mm, the width of the step at the narrowest point is not less than 270 mm, the width of the widest point is not more than 480 mm, and the width of the stairs is generally 900 mm or more and 1300 mm or less. . The height of the step of the luxury marble spiral staircase in the hall should be less than 150 mm, the width of the step at the narrowest point should not be less than 310 mm, the width of the widest part should not be limited, and the width of the stairs should generally be above 1300 mm, preferably above 2000 mm. . The basic frame of the spiral staircase must be made with concrete or steel frame. The curved curve of the stone veneer should be natural, and there should be no sudden change in curvature. A good stone spiral staircase should give a whole stone. The feeling of doing, can not have the feeling of dry branches, chastity.
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