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all steps in stock are designed for 5 kN/m² evenly distributed loads and 1.5 kN over 200 x 200 mm individual load. The spiral stairway steps in stock are available with a radius of 800 mm, 900 mm, 1,000 mm und 1,200 mm. Custom designs are available on request.

Spiral stairway steps are available in two basic designs:

• With a welded-on riser tube for mounting on a stair center pole. The perforation runs parallel to the stepping edge. The step pins and bolts are also supplied. The front edges are welded.
  When ordering, please indicate the slope "S" and pitch and also whether a left-turn or right-turn spiral stairway is desired.

• With an accurately fitting cut-out for welding onto a center pole or riser tube. The perforation runs parallel to the stepping edge. The corners of the step components are not welded. These weld-on spiral stairway steps are made of raw steel. When ordering, please indicate the pitch and whether a left-turn or right-turn spiral stairway is desired.