Hi,
You were correct with the first one. You simply push either door together, the wheels on top will do the hard work for you.
Kind Regards,
Mr.Blenkinsop

Can a door be made to accommodate a 12 foot door frame/enterance

These are Industrial style byparting barn door hardware. If your interested you can find them here: http://rusticahardware.com/bi-parting-barn-door-hardware-system/

We sell sliding barn door hardware. We are located in Idaho but ship our tracks all over the place. Our hardware is very high quality. We offer a variety of styles and finishes. We also specialize in custom orders. If you have a particular color in mind we own a powder coating facility which makes color options almost endless. The wheels on our tracks are unbelievably quiet, eliminating the grinding sound you hear with other tracks that use metal wheels. We see every single one of our products through from start to finish! contact us at http://www.basincustom.com or email us at info@basincustom.com or call 208-261-1270

Hello,

To see how these work, check out this video:

Barn doors don't work by putting their keys in a dish.