The small cantilevers Have got a span between 2 m and 3 m. However, you are able to raise the span by bettering the depth or prestressed structural member or employing metal. Hugo Junkers pioneered the cantilever wing in 1915. Just a dozen years following the Wright Brothers' Original flights, https://socialbuzzmaster.com/story5433237/helping-the-others-realize-the-advantages-of-cantilever-staircases