respectively into said cutouts so that the cross bar is disposed transversely across the drainage channel a clamping means is located at at least one of the ends of the cross bar to retain the cross bar in place after insertion of its ends into the cut outs the fixing means attaches the cover to the channel body by way of attachment of the cover to the cross bar application_number US 16193693 A description in the following description the same reference numerals are used for the same elements of the invention or for parts with the same function fig1 shows part of a drainage channel body 1 parallel side walls 2 2 39 of which define cutouts 7 7 39 situated a relatively short distance below an upper edge 3 3 39 or under support surfaces 6 6 39 for a cover 30 these cutouts 7 7 39 are similar to the cutouts of the prior art described above with reference to fig1 and 12 into the cutouts 7 7 39 the ends 81 81 39 of a cross bar 80 can he inserted the cross bar 80 is of u shaped cross section as shown in fig3 to 6 and comprises a base 83 which is substantially parallel to the cover 30 and two flanges or limbs 84 84 39 each of the flanges 84 84 39 is separated from the base 83 at one or other end 81.