a thin film layer of caprock is concrete (1) containing within the arming lower as bars (2), to which is mounted the upper in the form of rows of arming elements (4) projecting above the surface of the upper reinforcement concrete layer (1). element (3) has the shape of a letter l upper reinforcement.the lower arm element (3) is fixed to the upper reinforcing bars (2) lower and upper arms, arm element (3) reinforcing the upper is perpendicular to the lower arm element (3) reinforcing the upper.the lower arms upper reinforcing elements (3) in each row are connected with each other in a lower arms (8), and upper arms in each row are connected to one additional rod upper arms (9). rebar (8) arranged in the lower layer (1) and an additional concrete rebar upper (9) is arranged in the nadbetonu (4).
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