Zig Zag stairs| Zig Zag Zig Zag...
Like the name says the shape of the stairs is following a zig-zag line with the tread and the riser continuous from start to exit. During the last years self-supporting stair designs like the zig-zag stairs came more and more popular and there are many variations of this design available. Please see some examples below.
Wooden stairs with winded steps and glass balustrade