Filter

Scope

1. walls (2)
2. shaft walls (3)
3. solid walls (2)
4. facing shells (2)

sound insulation

1. elevated sound insulation up to 42 dB (2)

Access Panel Design

1. sound insulation (2)
2. removable (1)
3. air- and dust-tight (2)
4. solid wall (2)
5. fire protection (5)
6. fire protection wall - removable (5)
7. indoor (3)