23
To ensure internal ventilation, aeration channels must be provided as illustrated in the figures 25 and 26.
600 |
30 mm
Fig. 25
50 mm |
|
50 | 550 |
Fig. 26 |
|
23
To ensure internal ventilation, aeration channels must be provided as illustrated in the figures 25 and 26.
600 |
Fig. 25
50 mm |
|
50 | 550 |
Fig. 26 |
|