CONCRETE CULET WELL TRAY AND INSERT PART THEREFOR Russian patent published in 2009 - IPC E01C11/22 

FIELD: construction.

SUBSTANCE: invention deals with the problem of strength enhancement of concrete culet well tray, and improved versatility of coupling of the metal grid to the tray. Present task is solved by placing of embedded units made as cast flat bars with flat part directed along the lateral side of the tray are arranged in the concrete tray, in the upper part of longitudinal lateral sides whereof there are horizontal bearing surfaces housing holders with horizontal bearing surface for the metal grid. In the top part of bars there is a thickening in the shape of rectangular parallelepiped with an open cavity on the side of internal part of the tray for the fastening nut preventing its cranking. Central threaded opening for the clamp bolt is made through in the upper part of the parallelepiped, and flat part of the bar is equipped with anchor elements. Grids are mounted to the trays in versatile ways: either by means of threaded coupling bolt - threaded opening, or bolt - nut, arranged in the open cavity of the upper thickening part of the embedded unit. Embedded unit is made with stiffening ribs connecting flat part of the bar with the thickening part. Anchor elements of embedded unit may be performed on the lateral sides of the flat part of the bar as evenly widening toward the upper part of the bar ledges.

EFFECT: rigidity enhancement.

11 cl, 6 dwg