I’m upgrading an existing building and want a sleek, modern mono-stringer staircase fabricated in metal with a durable powder-coated finish. The structure must fit seamlessly into the current floor plan, respect head-height clearances, and meet local code for strength and safety... (Budget: $250 - $750 USD, Jobs: 3D Design, 3D Drafting, 3D Modelling, 3D Rendering, AutoCAD, CAD/CAM, Revit, Structural Engineering)