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

Section 7.5. venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting Systems

7.5.1. vent pipes for Traps