A bifold door is commonly used on closets, particularly in bedrooms, because it folds neatly out of the way. Each door consists of two panels connected with leaf hinges. Mounting hardware at the top of each door fits into a guide track screwed to the head jamb, while hardware at the bottom fits into a small pivot bracket that's screwed to the floor.
Fig. 1
INSTRUCTIONS
1) Install the guide track
Screw the guide track to the head jamb following manufacturer's instructions. To shorten the track to fit the opening, cut it with a hacksaw. (Be sure to wear safety goggles and gloves when cutting metal.)
The track can be concealed by a wood strip (Fig. 1). The strip usually does not come with the other door hardware.