The application/use is divided into three, i.e. domestic, commercial and light industrial. Light industrial is then subdivided into three classes, i.e. moderate, medium and heavy.

See, e.g.:
Classification of resilient, textile and laminate floor coverings (EN 685:2007):
Domestic:
Class 21: Moderate/light (bedroom).
Class 22: General/medium (other rooms, lounge).
Class 23: Heavy (hall).
Commercial/public:
Class 31: Moderate (e.g. office, hotel rum, conference room)
Class 32: General (e.g. classroom, hotel).
Class 33: Heavy (e.g. schools, corridors, department stores).
Class 34: Very heavy.
Light industrial:
Class 41: Moderate (e.g. electronic manufacturers).
Class 42: Medium (e.g. warehouse).
Class 43: Heavy (e.g. warehouse, other production premises).
http://docs.google.com/viewer?a=v&q=cache:Y8OT4YLHHNcJ:www.s...

Wear classification
EN 685:43
Light industrial heavy
http://www.flooringdownload.com/uploads/docs_general/P3043_K...

INDUSTRIAL/AREAS CONSIDERED FOR LIGHT INDUSTRIAL USE
Moderate - Areas where work is mainly sedentary with occasional use of light vehicles
General - Areas where work is mainly standing and/or with vehicular traffic
Heavy - Other light industrial areas
http://www.polyflor.com/jh/Technical.nsf/page/8AA302761A9E55...$file/Use%20Area%20Classifications.pdf

And for something in German:

Industriell (Bereiche die von der Leichtindustrie genutzt werden)
Klasse 41 / mäßig: Räume in denen überwiegend im Sitzen gearbeitet wird, mit gelegentlichem Fahrzeugverkehr, wie z.B. Elektronik- oder Feinmechanikwerkstätten
Klasse 42 / normal: Bereiche in denen die Arbeit überwiegend im Stehen ausgeführt wird und mit Fahrzeugverkehr, wie z.B. Lagerräume
Klasse 43 / stark: industrielle Bereiche, u.a. Lager- und Produktionshallen (siehe Bild 3)
http://www.baunetzwissen.de/standardartikel/Bodenbelaege-Ein...

According to the various links, your text would appear to be a little ambiguous - class 41 or class 43?

--------------------------------------------------
Note added at 1 hr (2011-01-11 12:34:49 GMT)
--------------------------------------------------

Try this for the broken polyflor link
http://docs.google.com/viewer?a=v&q=cache:Jisa9EqohHIJ:www.p...