Sliding Glass Door
A Sliding Door is a two or more panel fixture that is considered a single unit. Also known as Patio Doors, it is basically a large glass window that provides enclosure and access to the outside or between rooms. Besides offering the functionality of a door, the glass panel allows for natural light. Sliding are also much more space efficient since they do not need addition room to open or close.
Typical Sliding Glass Doors will have a bottom track to facilitate the movement of the door panels. Though top hung type can be employed it is not advisable since Glass panels are heavy and its safer and more robust to have a bottom track. The one way interlocking mechanism between the panels ensures that the doors provide complete coverage without any gaps.