Exterior spiral (metal) staircases are most often used due to the minimal space requirement when splitting houses, creating side steps, garden entrances or industrial buildings as side or escape staircases.
Thanks to the metal, these staircases look subtle and do not particularly disturb the overall impression of the house (usually suited to any facade color). At the same time, thanks to the used material (stainless steel), they also meet safety requirements such as durability, long life or anti-slip treads.
Systems to implement
What size of tread?
What are the recommendations?