What is clearance?
It is the height above the stairs, measured vertically in the walking line on the step where the stairs pass under the joist edge and should be at least 2000 mm. On spiral stairs, too steep a slope can cause you to hit your head on the bottom edge of the steps above.
Spiral staircases made of high-strength steel, easy and quick to assemble.
From one of the leading staircase manufacturers in Europe.
