TILE FOR ROOFING COVER Russian patent published in 1996 - IPC

FIELD: civil engineering. SUBSTANCE: tile is made in the form of irregular hexagonal plate and is provided with vertical and horizontal stiffness ribs placed at lower plate surface, through openings originated in a stiffness rib, and a projection placed on one line with vertical stiffness rib. Stiffness ribs are made so that they are smaller than length and width of the plate, and are placed so that flat edge sections are formed between ends of the ribs and lateral plate faces. When one edge section is imposed on another one a gap-free ceiling is formed. EFFECT: gap-free ceiling. 4 cl, 5 dwg