Typical Applications:-
        based on BSEN 1935:2002

Grade 1 - Light duty   Grade 3 - Heavy duty
Low frequency of use (little chance of doors being subjected to abuse or misuse). Example: domestic use, internal and external doors in dwellings, cupboards, cabinets, wardrobes, louvered doors and shutters. High frequency use (risk of misuse). Example: public buildings, hospitals, commercial use, office doors (medium to heavy use) classroom doors, etc.
Grade 2 - Medium duty     Grade 4 - Severe duty
Medium frequency of use (some chance of doors being subjected to abuse or misuse). Example: domestic/public area use, external doors of dwellings which give access to public areas. Office doors (heavy to severe use), doors in public areas i.e. schools, shops, public buildings, hospitals, prisons etc. (high risk of abuse).