NOVELTY - The device has chevron structures constituted of large and small dimension lateral chevrons (12, 16) with an inverted U-shaped section increasing from a transversal edge (10) to another transversal edge (11) forming a cue structure to allow partial covering of parallelepiped self-supporting plates (7) at transversal edges. An interior section of the lateral chevron (12) corresponds to clearance and an exterior section of the lateral chevron (16) to allow partial covering of the plates at longitudinal edges (8, 9), by embedding the lateral chevron (16) within the lateral chevron (12).    USE - Support device for positioning a solar panel such as photovoltaic type solar panel or thermal type solar panel, on a roof structure (claimed) of a building. Uses include but are not limited to an industrial building, agricultural building, dwelling house and shed.    ADVANTAGE - The interior section of one of the large dimension lateral chevron corresponds to the clearance and the exterior section of the small dimension lateral chevron to allow partial covering of the self-supporting plates at longitudinal edges by embedding the small dimension lateral chevron within the large dimension lateral chevron, thus ensuring rainwater flowing passing between the photovoltaic panels, and facilitating handling during installation and limiting the weight supported by the frame. The inflexible, resistant and self-supporting characteristics of the self-supporting plates allow direct installation on the horizontal flange and allow the operators to walk directly on the structure during installation. The device has better resistant, and is light in weight and easy and quick to install, and ensures better sealing while allowing top fixing of the photovoltaic type or thermal type solar panels in a simple and rapid manner.    DESCRIPTION OF DRAWING(S) - The drawing shows an isolated perspective view of one of self-supporting plates constituting a supporting device.    Parallelepiped self-supporting plates (7)    Longitudinal edges (8, 9)    Transversal edges (10, 11)    Large dimension lateral chevron (12)    Small dimension lateral chevron (16)