Middle-spine staircases are far from traditional and boring. They are freestanding stairways that don’t need supporting walls on either side. Instead, treads rest on a central spine, which gives the impression of floating. Due to the building regulations, the beam needs to be made of steel; you can still get carried away when it comes to treads, balustrades and colours.
Central-spine staircases become more and more popular due to their interesting look. Treads can rise in a total harmony with the central beam or you can go for a favourable contrast choosing different materials and colours that can also imitate the existing interior design.