7.4.10.11.Hydraulic Loads on Leaders

(1) The hydraulic load that is drained to a leader shall conform to Table 7.4.10.11.

                                                       Table 7.4.10.11.
                                     Maximum Permitted Hydraulic Load Drained to a Leader
                                            Forming Part of Sentence 7.4.10.11.(1)

                          Circular Leader                                                  Non-Circular Leader
  Nominal Pipe Size of Leader,                                                                               Maximum Hydraulic
                                    Maximum Hydraulic Load, L               Area of Leader, cm2
             NPS                                                                                                  Load, L
              2                                  1 700                             20.3                             1 520
              2½                                 3 070                             31.6                             2 770
              3                                  5 000                             45.6                             4 500
              4                                  10 800                            81.1                             9 700
              5                                  19 500                           126.6                            17 600
              6                                  31 800                           182.4                            28 700
              8                                  68 300                           324.3                            61 500

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.