The Tours spiral staircase, with a diameter of 140cm (4’ 7.1”), is a sturdy, industrial cast iron spiral staircase with a (comfortable) rise of 17.5cm (6.89”)
per tread. The staircase is available turning anti-clockwise with a rotation speed of 14 steps per full turn (rotation of 25,71 degrees per tread).
With perforated treads, allowing water to fall through, the staircase is an ideal outdoor solution.