The modular system can be used anywhere where a height of 4 m is not exceeded, and you can manage with a rectangular standardized access landing. Despite the short delivery time and the standardized landings, each staircase is adjusted to the structural situation with regard to the inclination and the coiling. Diameters from 1,600, 1,800 and 2,000 mm can be realized. Due to standardization, this system can be offered at favorable terms and very short delivery times