https://wifidb.science/wiki/10...._Facts_About_Bi_Fold
https://imoodle.win/wiki/What_....Is_The_Reason_Bifold
How to Repair a Bifold Door Top Pivot The top pivot may become loose and scrape the floor. This can be corrected by loosening up the screw that holds the top bracket. The top pivot pin is a metal screw that is inserted into a cap made of plastic with an end that is lipped and stays inside the track above the door. You'll need a screwdriver and possibly