The height and width of the steps may vary. Cast staircases can be formed in both straight and curved shapes. BetoFomos stair casting principle: A lower step is cast on a stable sand/rubble base The second step is installed on the top of the first step with an overlap of 2-3 cm The same principle applies to the casting operations of the next stairs BetoFormos solutions for outdoor amphitheatre formation: Amphitheatre steps with cast Betoformos concrete between steps. Amphitheatre steps with a roll lawn or other type of coating between steps.