Spiral Stairways have a rise taller than straight or curved stairs. The increase in rise prevents you from hitting your head on the tread above you as the stair spirals up.
Spiral stairs are built to your specifications for your particular installation. 20 models to choose from!
When requesting a quote:
1) We suggest you choose a riser option. Without a riser (open space between two treads), your stair may not meet your local building code as the space between the treads exceeds the 4″ sphere rule.
2) If using for exterior please request an aluminum stairway.