Abstract: A drainage channel is shown which features a body having complementary ends which, in abutting relationship, form interlock with adjacent channel bodies when joining the channel bodies together; and an edge protective frame device for the upper free rims or edges of the channel side walls comprising a web resting on top of the channel side wall and two anchor legs extending downwards from and linked by the web and proceeding in the same direction and distance, at least one of which anchor legs is flush with its respective channel side wall and between the two of which legs the material of the upper part of the channel walls is formed; and a mounting leg for a channel cover, extending upwards from the outer edge of the web.

Abstract: A drainage channel is shown which features a body having complementary ends which, in abutting relationship, form interlock with adjacent channel bodies when joining the channel bodies together; and an edge protective frame device for the upper free rims or edges of the channel side walls comprising a web resting on top of the channel side wall and two anchor legs extending downwards from and linked by the web and proceeding in the same direction and distance, at least one of which anchor legs is flush with its respective channel side wall and between the two of which legs the material of the upper part of the channel walls is formed; and a mounting leg for a channel cover, extending upwards from the outer edge of the web.

Abstract: The invention relates to a draining ditch for the draining of roadways comprising a ditch body of U-shaped cross-sectional area which is potted in the concrete bed of the roadway and a cover plate or body covering the upper surface of the ditch body, the plate being provided with an abrasion resistance equal to or less than that of the roadway and having a thickness of at least half of the width of the ditch body and with a plurality of inlet openings.

Abstract: A frame formed of metal, for draining ditches, comprising two downward pointing legs extending in parallel spaced relationship forming between them a channel having the material in the upper region of the wall of the ditch formed integrally with it therein said legs being interconnected with each other via a web the upper surface of which forms an abutment area for a ditch covering, and a leg extending upwards from the web for holding the channel covering laterally, with the two lower legs, in particular, being provided with several recesses at the undersides thereof leaving between them projections with the recesses and projections of the one lower leg being respectively arranged to abut at least in part or at least approximately the gaps of the other lower leg.