Spiral stairs There are several types of:
1. Cantilever spiral staircase
It is mainly supported by the middle steel column. The stair step beam is welded to the steel column. The steel column is generally made of steel pipes, which requires rigid connection at the bottom of the column. The axial pressure bearing capacity of steel column is very strong, so the key of design lies in the calculation of the support capacity of stair treads and the bearing capacity of steel column under eccentric load.
2. Plate type spiral staircase
(1) There is no intermediate support for the revolving stairs. The support points are at the bottom and upper parts of the stairs, which are mainly formed by the stairs themselves. The stair beam of this kind of stairs generally adopts welded rectangular tubes, and the step plate and riser are 10mm steel plates, which are required to be fully welded.
(2) The processing of stair beam is very difficult because it is actually a spatial curve. Generally, two vertical plates are processed first, and the vertical plates are bent and shaped according to the actual lofting requirements. After the inner plate is installed on the site, the other three plates are assembled on the site and welded firmly.
Hebei staircase manufacturer Explain the types of spiral stairs
Precautions for the design of spiral stairs are as follows:
Pay attention to the slope of stairs
The gradient of stairs is related to the comfort and efficiency of climbing, as well as the state of space and so on. Home stairs The inclination of is generally 20 ° - 45 °, and about 30 ° is preferred.
Select appropriate pedal material
The steps of the stairs are fan shaped design. The size of ordinary women's shoes is 36, which is in the middle of the steps, accounting for nearly 3/4 of the width of the steps. It can be seen that the design of the width of the steps is relatively reasonable. In addition, the height between the two steps of this staircase (that is, the step height) is about 12mm, which makes it very comfortable to walk at this height.
