A wall is then built across the brackets. Then the finished treads are bolted in position. These treads might be of metal or wood or Wooden clad metal. Cantilever steps should be built by a structural engineer, to ensure that they remain horizontal and rigid with use over time. Usually, https://staircaseinspirations.weebly.com/blog/the-rise-of-cantilever-staircases-in-contemporary-homes