decided to try this and see what is the problem.lt appears to be a collision with the trusses and cantilevers when trying to make a staircase. If you try to work from the floor to the top you get a collision says cant place here truss or cantilever in the way. SO I tried from the top down and can place the first one on level with the truss however cant place one belore that recieve same issues cant place truss or cantilever in the way. Using ramps does not look as nice as using floors or decks.