The Ontario Building Code | Rain Leaders
7.4.10.10. Rain Leaders
(1) No change in the size of a rain leader with a nominally horizontal offset is required if the offset,
(a) is located immediately under the roof,
(b) is not more than 6 m long, and
(c) has a slope not less than 1 in 50.
(2) If the horizontal offset is more than 6 m long, the rain leader shall conform to Table 7.4.10.9.
(3) The hydraulic load that is drained to a rain leadershall conform to Table 7.4.10.10.
Table 7.4.10.10.
Maximum Permitted Hydraulic Load Drained to a Circular Rain Leader
Forming Part of Sentence 7.4.10.10.(3)
| Item | Column 1 Size, in. | Column 2 Maximum Hydraulic Load, L |
| 1. | 2 | 1 700 |
| 2. | 2 ½ | 3 070 |
| 3. | 3 | 5 000 |
| 4. | 4 | 10 800 |
| 5. | 5 | 19 500 |
| 6. | 6 | 31 800 |
| 7. | 8 | 68 300 |
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