The length of this opening has to be 54 1 4 inches the distance that you calculated in step 1.
Making a pocket door out of a french door.
And a good thought above too.
Or you might even consider french.
A door will need two mullions to make four light windows.
Select narrow weatherstripping that will not interfere with the movement of the door and placement of the door over the door stop and soffit.
Remove the paper backing from the weatherstripping and apply the strips to the flat side of the door stop and soffit where the pocket door rests on the stop and soffit.
By centering the doors are you making a tripping hazard.
I like the suggestion someone made about sliding glass doors.
Mullions frame and hold the glass in the door.
First of all since these doors will be exposed to the elements it s a good idea to make them out of rot resistant hardwood such as white oak or mahogany.
By moving them to the far end it might provide a smooth in and out.
You can choose to buy mullions in the same wood as the door or different wood for contrast.
How would pocket doors ever seal since you need that space to make them slide in and out.
Building a set of french doors involves milling many parts and some careful upfront planning.
Buy mullions from the store to fit the door.