PLATE FOR SECTIONAL ROADWAY COVERING Russian patent published in 1995 - IPC

FIELD: civil engineering. SUBSTANCE: plate has polygonal structure of connected to one another through their thickness upper and lower side parts. Side faces of each part of the plate are made in the form of alternating projections and recesses. The projections and recesses of basic upper part of the plate are placed respectively over recesses and projections of lower part of the plate. Angles between lateral sides of the projections and recesses of the lateral faces of each part on the one hand and the plane passing through vertical corner edge of this lateral face in points where they intersect on the other hand are larger than 0 and smaller than half of least angle formed with planes passing through vertical corner faces of adjoined lateral faces of this part of the plate. The plate may have at least one additional part rigidly connected to one of the basic parts of the plate. Lateral faces of this additional part are made in the form of alternating projections and recesses placed respectively under recesses and projections of lower basic part or over projections and recesses of upper basic part. Angle between lateral sides of the projections and recesses on each face of additional part on the one hand and the plane passing through vertical corner edges of this lateral face of the plate in points where they intersect on the other hand is larger than appropriate angle between lateral sides of the projections and recesses of the basic part of the plate related to them. Lateral faces with alternating projections and recesses has the same number of projections and recesses in each part. Shape of the projections and recesses is similar in each part of the plate. Lateral sides with alternating projections and recesses may have not less than two projections and recesses in each part of the plate. Bevels may be made along the perimeter of alternating projections and recesses of lower row of the plate. EFFECT: easy handle and use. 6 cl, 9 dwg