WEEK 3 -YOUTUBE VIDEO
https://www.youtube.com/watch?v=wkoYdpzDOS0&t=9s&list=PLTuzQMAmbctyWLNpdatdOY5Lj7JjhTdyk&index=2 This sketchup tutorial vedio teaches how to build a spiral staircase. It may be useful if i try to make a spiral stairscase or to build my staircase with curves.