By Desperado via Skylark

This isn't really a "spiral" stair, but it is a variation of the chopped stairs theme, so tacking Desperado's wonderful step by step tutorial on here so it isn't lost.

Tutorial was inspired by Breyn Darkthorne's "Pink Palace" located outside Luna on Catskills.

The Pink Palace


Desperado's tutorial:

1. Place your backside walls where you want them and then place 9 teleporters 2 tiles back from the walls.



2. Place the lower set of north stairs over these teleporters, then delete the teleporters through the method in the sticky post up top.



3. Lay down three teleporters as shown in the picture.



4. Place a west facing stair over the teleporters and cut the stairs.



5. Place your upper row of north stairs.



6. Delete the west facing single stair so it will remove the lowest steps from your second row of north stairs.



7. Place two rows of teleporters between the north facing stairs.



8 & 9. Place east and west facing stairs and cut as needed.



10. Finished product. Ignore the black gozas, only cloth I had on hand at the moment.