How to create a spiral stair in Rhino and VisualARQ?

The video shows the process of how to create a parametric spiral stair in Rhino using VisualARQ. The video also shows how to change the spiral stair properties like the number of steps, the stair heigh, direction, etc,.. and how to create new stair styles. VisualARQ is an architectural software that runs as a fully integrated plug-in in Rhinoceros. More information in Download a free trial here: