Maximum Valley Catchment in m² for Areas Having a 50-year Rainfall Intensity <150 mm/h
Maximum Valley Catchment in m² for Areas Having a 50-year Rainfall Intensity <150 mm/h
| Roof Pitch | 3° | 5° | 8° | 10° | 12.5° | 15 | 20° | 25° | 30° |
|---|---|---|---|---|---|---|---|---|---|
| A 3-fold | 12 | 18 | 29 | 41 | 70 | 106 | 146 | ||
| B standard | 25 | 34 | 47 | 63 | 99 | 140 | 184 | ||
| C Deep | 60 | 86 | 152 | 180 | 215 | 251 | 321 | 389 | 452 |
| D Tile | 17 | 22 | 33 | 45 | 57 |
Free Board: 15 mm for pitches 8° and above
20 mm for pitches below 8°
20 mm for pitches below 8°
Clause Number:
5.5.2C
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