This standard defines performance parameters. The fittings are subjected to a test procedure regarding their load in order to be able to classify them into one of 4 categories of use. These are based on the expected area of use. For this purpose, a classification system for the comparability of the fittings was introduced. Dimensions are not taken into account.
Category 1
(e.g. interior doors of residential buildings): Average frequency of use by persons who handle fittings with care and who have a low risk of incorrect use.
Category 2
(e.g. interior doors in office buildings): Average frequency of use by persons who are basically careful with fittings and from whom a certain risk of incorrect use emanates.
Category 3
(e.g. doors in office buildings with public access): Frequent use by people who tend not to handle fittings carefully and who run a high risk of incorrect use.
Category 4
(e.g. hospitals, sports stadiums, schools): Maximum frequency of use by a large number of people, as well as the risk of frequent damage through the use of force.
