Tenant 203-C Product data about south face overhead door is available at website:

http://www.overheaddoor-oc.com/ProductCommercial.aspx?pid=155

To be a steel roll top approximately 9'4"

Commercial Overhead Doors

here is a commercial overhead door that I think will work great in this project.

http://www.amarr.com/commercial/browsebystyle/sectional_doors/3500.html