Stair section
The number of steps on each stair section shall not exceed 18, taking care of the continuity of the people walking on the stairway, and the number of steps on each stair section shall not be less than 3 levels.
2. Stair platform
The landing platform is divided into a floor platform and an intermediate platform according to its location.
3. Railings (lanches) and handrails
The railing (handrail) is a retaining member placed on the stair section and the airside side of the platform. It should have a certain strength and rigidity, and should be provided with handrails for hand support on the upper part.
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