Although the classification in accordance with European standards of the “Fire resistance classification of construction products and building elements” is not directly applicable to national symbols, in Latvian building standards are found such a terms as non-flammable, hard flammable and flammable.
The comparison of fire reaction classes designations used in European standards and national building standards shown in the table below.
Designation in Latvian building supervison | Designation according to DIN EN 13501 | Designation according to DIN 4102 |
Non-flammable | A1 | A1 |
Hard flammable | A2 – s1 d0 | A2 |
Hard flammable | B, C – s1 d0
A2, B, C – s2 d0 A2, B, C – s3 d0 A2, B, C – s1 d1 A2, B, C – s1 d2 A2, B, C – s3 d2 |
B1 |
Normal flammable | D – s1 d0
D – s2 d0 D – s3 d0 D – s1 d2 D – s2 d2 D – s3 d2 E E – d2 |
B2 |
Flammable | F | B3 |
Additional construction material classification designations according to DIN EN 13501:
s – smoke generation and development
d – burning droplet occurrence