Half Turn Spiral

A half turn spiral staircase completes an approximate 180-degree rotation from top to bottom, roughly half the turn of a standard spiral. It enters and exits on opposite sides of the stairwell, offering a compact way to move between floors using an even smaller footprint compared to what a full spiral requires.

Yes. The reduced footprint and lower riser count make the Half Turn Spiral series a common choice for both attic access and basement access, particularly in homes where a full spiral staircase wouldn’t clear the available space. It’s also suited to mezzanine levels and other short vertical runs with limited headspace.

A half turn spiral staircase requires a minimum well opening of 36 by 68 inches, smaller than what a standard spiral needs because it doesn’t require a full circular clearance at every level. Exact opening size and other requirements vary by application.

Most half moon spiral staircases use 11, 12, or 13 risers, depending on the total height between floors. Each configuration is engineered to a specific height range, so the riser count follows from your space rather than being chosen independently of it.

Yes. A half turn spiral staircase can be installed in either right-hand or left-hand orientation, giving you flexibility in how the stair enters and exits the room at each level.