Galvanized Steel Fixed Stairs Design

I need a complete Autodesk Inventor model for a set of industrial fixed stairs. The structure must be steel and detailed for a hot-dip galvanized finish, so all edges, welds, and drainage holes should be considered in the design... (Budget: $10 - $30 AUD, Jobs: 3D CAD, 3D Design, 3D Drafting, 3D Modelling, AutoCAD, Autodesk Inventor, CAD/CAM, Engineering Drawing, Mechanical Engineering, Solidworks)