Stringers — bearing profiles, should be located at the same level, in one direction relative to each other and necessarily perpendicular to the rails. The profiles are attached to the ceiling on the suspensions, after, the design is checked by the level. Using the adjustment springs, you can, later, vary the height. Before installing from the racks, you should not forget to remove the films. Typically, the process of installing rails begins with the edges, and after that, the panels are snap on the supporting profiles. It must be remembered that the panels are very easily deformed, so the caution will not be unnecessary here. The edge of the last rail must go for the skirting board until it stops.