Origami Stair by Bell Phillips is made of folded stainless steel and framed with a glass balustrade. Very modern. Love the metal and glass contrast. It allows lots of light through, whilst still being strong structurally.
KAIROS / João Quintela + Tim Simon Attention to detail I guess the idea was that the stair can be a part of building skin. For that, the architect made new type of stair. Actually the stair does not exist itself.