| 摘要 |
A lining panel comprises directed to one side and arranged in arc of a circle crimps, a two-element lock joint elements of which as a male section and a female section are placed on the side edges of the panel, flat mounting surface of the panel. The female part is a flat seam that is arranged as a fold, its first part is bended at acute angle to the flat mounting surface of the panel, the next part is arranged as parallel to the flat mounting surface of the panel, and the end section is arranged as drop-like or is bent to the flat mounting surface of the panel. The male part is arranged as a hook that is bent to the façade side and has the end that follows the form of the end section of the broken end. Between the crimps a rigidity rib is provided, this is V-like in shape, its acute angle goes out of the boundaries of horizontal plane of the flat mounting surface of the panel. The lengths of the chords of the arcs belong to one plane and have the ratio from 1:1.02 to 1:1.05, at that the smaller chord belongs to the short arc of the crimp that is equipped with female section of the lock joint as a hook. |
