The tiny cantilevers have a span amongst two m and 3 m. Having said that, you'll be able to enhance the span by bettering the depth or prestressed structural member or applying steel. If it can't handle most of the anxiety, a cantilever may possibly arc downward and even crack. https://staircaseinspirations.weebly.com/blog/the-rise-of-cantilever-staircases-in-contemporary-homes