You can find them mounted to the ceiling, the so-called Squared design, or mounted to the available side glass. In case the premise where you are going to install sliding doors has a plasterboard or square suspended ceiling, you’ll need an additional support to bear the weigh of a sliding door with a maximum width of 120 cm. As for the second option, there’s a compact pulley system allowing for horiziontal movement of a sliding door at opening and passage. In this case, the maximum width is also 120 cm.