> A1: Materials may be classed as A1 materials if they:
- Pass the test specified according the standard corresponding parts
- meet the requirements for class A2 materials
> A2: Materials may be classed as A2 materials if they:
- Pass the test specified according the standard corresponding parts
- Pass the test specified DIN 4102-16
Class B
> B1: All materials, except flooring, may be classed as B1 materials if they
- Withstand the test specified in DIN 4102-16 using the ‘Brandschacht’ apparatus specified in DIN 4102-15
- Meet the requirements for class B2 materials.
> B2: Materials may be classed as B2 materials if they
- Pass the test specified according the standard corresponding parts
- Flooring materials may be assigned to material class B2 if they meet at least the requirements for class T-b as in DIN 66081