After years of these doors swinging they had begun to sag in the middle so the doors were making contact with each other making it impossible for them to close without a heck of a lot of assistance. So we installed two half surface continuous hinges freeing up 1/8 of an inch between the two of them. Now they close very cleanly.
The door below is a door that we replaced on a old building that had been converted into lofts. The company had done a wonderful job it was sincerely a beautiful project and now they have doors that are going to last another 20 years.