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.