Paul from SWISCO responded:
February 1, 2018
Thanks for posting. We have metal tracks that should work with your metal doors such as our 21-404 for the 4' opening and 21-402 for the 5' opening. The 149" opening is going to be a problem since the longest is 6' and piecing two together will only give you 144". You would need a bottom and top track for each opening as well as one of our 21-001 bottom pivot pin and three of our 21-007 guide pins for each panel. Additionally, you may need some of our 21-151 nylinders so the pins can slide easily in the door frame. You will need two of our 21-277 rubber bumpers for the top and bottom where the doors meet in the middle. Personally, I would recommend you doing one set to see how it works out for you.
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