Meaning of the Numbers in the Classification Key:
1. digit:
Category of use | |||||||
Grades | 1-4 |
2. digit:
Durability | ||
Grades | 6 or 7 | |
Description of grades | 6 = 100,000 cycles 7 = 200,000 cycles |
3. digit:
Door mass | ||||||||||||||
Grades | no classification | |||||||||||||
Description of grades | - |
4. digit:
Fire resistance | |
Grades | 0, A, A1, B, B1, C, C1, D or D1 |
Description of grades | 0 = Not approved for use on fire/smoke door assemblies A = Suitable for use on smoke door assemblies A1 = Suitable for use on smoke door assemblies (tested with 200,000 test cycles on a test door) B = Suitable for use on fire/smoke door assemblies (tested with 200,000 test cycles) B1 = Suitable for use on fire/smoke door assemblies (tested with 200,000 test cycles on a test door) C = Suitable for use on smoke and fire-resistant doors with requirements for fire-resistant dividers in backplate, door rose and escutcheon C1 = Suitable for use on smoke and fire-resistant doors with requirements for fire-resistant dividers in backplate, door rose and escutcheon (tested with 200,000 test cycles on a test door) D = Suitable for use on fire/smoke door assemblies with require for a steel core in the handle D1 = Suitable for use on fire/smoke door assemblies with require for a steel core in the handle (tested with 200,000 test cycles on a test door) |
5. digit:
Safety * | ||
Grades | 0 or 1 | |
Description of grades | 0 = Normal use 1 = Safety applications |
6. digit:
Corrosion resistance | |
Grades | 0-5 |
Description of grades | 0 = No defined corrosion resistance (no test) 1 = Mild resistance (24-hr salt-spray test) 2 = Moderate resistance (48-hr salt-spray test) 3 = High resistance (96-hr salt-spray test) 4 = Very high resistance (240-hr salt-spray test) 5 = Extremely high resistance to corrosion (480-hour salt-spray test) |
7. digit:
Security | ||
Grades | 0-4 | |
Description of grades | 0 = Furniture not approved for use on burglary resistand doors 1 = Mild burglary resistance 2 = Moderate burglary resistance 3 = High burglary resistance 4 = Very high burglary resistance |
8. digit:
Type of operation | ||
Grades | A, B or U | |
Description of grades | A = Spring-assisted furniture B = Spring-loaded furniture U = Unsprung furniture |
* According to DIN EN 1906 the increased safety tests (for example for doors to cellars where there is risk of falling) are optional, so the figure 0 may appear by digit 5 in the classification key. However, according to DIN 18255, all public building sets, and as such subject to categories of use grades 3 and 4, must pass this test.