The manufacturer’s covers are made of metal and come in square , rectangular , or round shapes. Notably, a relatively large number of octagonal covers (or square covers with truncated corners) exist .
No colored or gilded covers were found for this manufacturer. City emblems also do not appear on the manufacturer’s covers.
In most cases, the intended purpose of the cover is not indicated, except in obvious cases such as drainage covers .
The year of manufacture usually does not appear on the covers.
Standards The covers bear the British Kitemark standard and the European EN124 standard with its associated load classes (mainly D400 and B125) . The SGS standard can also be found.
Typical Covers Many of the manufacturer’s covers are drainage covers, usually square, with various shapes of drainage slots . Another common type has a background consisting of the letters ID, which appears on different cover shapes: square or round . Another frequent background pattern consists of raised dots .
Many covers are diagonal (square or rectangular, divided into two triangles, with opening achieved by lifting one of the triangles ).