Graphical Construction Glossary >> stairs. >> general >> Stair Winders
The sketch above shows a flight of stairs ending in a quarter turn with three winders. A quarter turn is 90 deg. and each nosing line should be evenly spaced at 30 deg. to it's neighbour.
Note the strings that I have drawn in the sketch above. The main flight sweeps into a curve at the first winder. It is more work to laminate up a one piece curved string, but it is far stronger than the jointed straight section strings that seem to be the fashion these days.
Wall rails are important around sections of stairs that use winders. The slope angle in very steep towards the centre so people tend to walk around them toward the outer edge.
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