Large Mild Steel Ellipse Design

I need a detailed design for a large-scale mild steel ellipse that will serve as a structural component on an upcoming build. The finished piece must span more than three metres on its major axis yet be kept to a thin wall thickness between 1 mm and 5 mm.

What I’m expecting from you:
• Precise CAD drawings (DXF/DWG and PDF) showing overall dimensions, inner/outer radii, centre-point locations, and any joining or stiffening suggestions needed to keep the thin section stable at this size.
• A cutting and bending schedule ready for laser or plasma profiling in mild steel.
• Basic FEA or hand-calc notes that confirm the section’s structural integrity once fabricated and fixed in place. No exhaustive report required—just enough to demonstrate it will meet normal load and deflection limits.

I will supply mounting-point coordinates and load data as soon as we’ve agreed on the outline. If you routinely work in SolidWorks, AutoCAD, or a similar platform, that’s perfect; just let me know which you prefer.

Please tell me how quickly you can deliver the initial draft and how many revisions are included. I’m looking forward to collaborating on a clean, fabrication-ready solution.