Mezzanine Floor & Staircase Plans

I need a full set of steel-framed mezzanine floor drawings that I can hand straight to my fabricator and, if required, a structural engineer for sign-off. The deck is intended purely for storage, so the layout must maximise clear span below while meeting standard warehouse live-load requirements.

Please produce a detailed structural design: member sizing, connection details, base-plate specs, stair stringer and handrail drawings, plus plan, section and elevation views. I work in AutoCAD, so DWG files are essential along with printable PDFs.

If anything in my brief is unclear, let me know early so the final package is construction-ready with no back-and-forth.