Automatic telescopic doors offer a great benefit when space is limited. By incorporating an additional sliding door active leaf, a telescopic automatic sliding door allows you to gain additional clear door opening ... particularly welcome in the tightest of spaces. Telescopic is an automatic telescopic door that sets a new standard in telescopic performance by providing superior support and stability. By utilizing an exclusive “door on door” design, the telescopic automatic sliding door has an innovative design that improves upon inferior suspended track systems. It places the door weight on the structural portion of the automatic door header via two structural boxes with integrated replaceable aluminum tracks.