Stainless steel or steel railings
The railing itself should be of solid material, comply with all safety standards and be maintenance-free. The smallest allowable railing height is 0.9 m, the basic height is 1 meter, which is valid for a free space depth of 3 to 12 m.
As for exterior-outdoor railings, the selected material must withstand weathering. Stainless steel handrails are therefore a good choice, with easy maintenance and stainless steel railing for long life. Metal can be easily combined with wood on handles and glass in panels.
References
Spiral staircase
Lipno
Glass staircases
Jetzelsdorf