Cover for light and/or ventilation shaft, has frame with side parts, which are connected with each other by corner connector and including two parallel surfaces, where side parts are formed as extruded sections

摘要

The cover has a cover plate, and a frame with side parts, which are connected with each other by a corner connector, where the parts are formed as extruded sections. The side parts have two parallel surfaces, and a groove is arranged between the parallel surfaces. The cover plate can be inserted into the groove, where the parts have three bars that extend parallely on a side of the plate.