Spiral stairway step Graepel-Universal
The Spiral stairway step Graepel-Universal with a perforated edge is made of hot rolled low carbon steel (DD 11) and is suitable for use in industrial areas. The spiral staircase step can be welded to a central pipe by the customer. It is designed for a uniformly distributed load of 5 kN/m² and a concentrated load of 1.5 kN for 200 x 200 mm.
The surface is characterized by upward-facing perforations (d = 7 mm) and downward-facing perforations (d = 14 mm). The open cross-section is approx. 19 %. This step offers an attractive perforation pattern and features excellent anti-slip values, a great displacement space as well as good drainage properties. The perforated nosing prevents slipping from the step’s edge
The material thickness is 2.5 mm. The perforation or embossment runs parallel to the stair’s nosing. The corners are not welded. The spiral staircase step can be supplied with a left- or right-hand turn, for different stair radii, and different center support column diameters.
More information about Graepel-Universal embossment.