Coverings for gullies, shafts or similar structures are known, the coverings having a first grating (10) which is manufactured from sheet metal and has slots (11) and webs (12), which have surfaces (13) and respective side surfaces (14, 14') made of sheet metal which is bevelled in relation to the surface. In order to increase the stability, it is proposed to provide at least one second grating (20), the webs (22) of which are inserted into the slots (11) of the first grating (10).
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