30
To ensure internal ventilation, aeration channels must be provided as illustrated in the figures 21 and 22.
600 |
30 mm |
Fig. 21
50 mm |
|
50 | 550 |
Fig. 22 |
|
30
To ensure internal ventilation, aeration channels must be provided as illustrated in the figures 21 and 22.
600 |
30 mm |
Fig. 21
50 mm |
|
50 | 550 |
Fig. 22 |
|