The manufacturer’s covers are made of metal

 

and are circular

 

, square

 

, or rectangular

 

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Circular covers intended for sidewalks are often surrounded by a square frame to facilitate paving work

 

(these are actually all the square covers appearing on the site).

No colored covers by this manufacturer were found on the site (except covers with a colored silicone gasket - see below under "Color code for identifying the purpose of the manhole"), but several golden covers were found

 

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City emblems appear on some of the manufacturer’s covers (mainly due to the requirements of local authorities)

 

On many covers, the purpose of the cover is not indicated. In other cases: drainage covers are identified by drainage slots

 

; water covers bear the word “water” (“Vatten” on covers from Sweden)

 

or the letter V

 

; sewer covers bear the letter A (“avløpsvann” - wastewater)

 

; and FV (“fjernvarme” - district heating) appears on covers intended for heating or gas systems.

The year of manufacture usually does not appear on the cover.

Several covers are noteworthy: some feature famous buildings

 

, works of art

 

, and a cover dedicated to the Norwegian rock band “THE DOGS”

 

.

Color code for identifying the purpose of the manhole
This manufacturer uses colored gaskets to identify the purpose of the manhole. This is intended to facilitate identification when the covers are covered by snow, or when several covers are located close to each other, and allows for quick identification, especially in emergencies:
Yellow - standard cover םר gas
Red - fire hydrant
Blue - water
Green - sewage
These colors are specific to this manufacturer; other manufacturers in Norway do not necessarily use the same color code.

Havner det på bakken, havner det i havet
"If it ends up on the ground, it ends up in the sea" a project launched by the Oslo Municipal Environmental Agency (Bymiljøetaten) to raise awareness of marine pollution and prevent littering. The lids feature drawings by school children dealing with the issue.

 

Standards
The European standard EN124 and its associated load classes appear on many covers, with the most common load classes being B125 and D400

 

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Many covers also bear the Norwegian NS standard mark

 

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Typical Covers
A typical cover features circles surrounding a common center and separated by rays extending outward from the center, creating rings of quadrilateral shapes

 

. Another type consists of three semicircles touching one another (in a form reminiscent of gears)

 

.
Another common type is a cover containing circles made of plus signs, usually with an emblem in the center

 

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There are also many forms of circular drainage covers

 

.

Additional types can be seen at the bottom of this page.
There are 59 manhole covers in the site that are made by the Manufacturer
Click for the 59 covers made by Ulefos nv (Of these, 8 are best covers)