Looking for the specialist who is keen on construction and design of the staircase. The building is already done. The material of the construction must be metal, the risers are also metal, the material of the steps is wood. I need a design plan, a structural plan, calculations of strength and rigidity, a plan of metalwork parts for their cutting and bending. I attach two files. Pdf: 39-?? and 40-??, these are the plans of the basement and the 1st floor. The direction of the ladder should be left as in the plans. More detailed information on the progress of your project.