How much headroom does a steel staircase need?

Enough for clear space above your head on every step; the minimum headroom is set by the regulations in your country. It is measured vertically from the step nosing to the lowest thing above the flight, usually the edge of the floor opening or a beam. Give us the size of the opening and the slab thickness, and when we calculate the flight we will check headroom along its whole length and propose a pitch or position that provides it. See how to survey the headroom envelope.