Ontario Building Code - Section 649

2024 Building Code Compendium 7.4.10.6. Division B – Part 7 51 Table 7.4.10.6.-A Maximum Permitted Hydraulic Load Drained to a Stack Forming Part of Sentences 7.4.10.6.(1) and 7.5.7.3.(2) and Table 7.5.8.4. Nominal Pipe Size of Stack, NPS Maximum Hydraulic Load, fixture units Maximum Fixture Units Drained from any 1 Storey 1¼ 2 2 1½ 8 2 2 24 6 3 102 18 4 540 100 5 1 400 250 6 2 900 500 8 7 600 830 10 15 000 2 700 12 26 000 4 680 15 50 000 9 000 Table 7.4.10.6.-B Maximum Permitted Hydraulic Load Drained to a Branch Forming Part of Sentences 7.4.10.6.(2), 7.4.10.7.(1) and 7.5.7.3.(2) Nominal Pipe Size of Branch, NPS Maximum Hydraulic Load, fixture units 1¼ 2 1½ 3 2 6 3 27 4 180 5 390 6 700 8 1 600 10 2 500 12 3 900 Table 7.4.10.6.-C (1) Maximum Permitted Hydraulic Load Drained to a Sanitary Building Drain or Sewer Forming Part of Sentence 7.4.10.6.(2) and Article 7.4.10.8. Nominal Pipe Size of Drain or Sewer, NPS Maximum Hydraulic Load, fixture units Slope (2) 1 in 400 1 in 200 1 in 133 1 in 100 1 in 50 1 in 25 3 n/a n/a n/a n/a 27 36 4 n/a n/a n/a 180 240 300 5 n/a n/a 380 390 480 670 6 n/a n/a 600 700 840 1 300 8 n/a 1 400 1 500 1 600 2 250 3 370 10 n/a 2 500 2 700 3 000 4 500 6 500 12 2 240 3 900 4 500 5 400 8 300 13 000 15 4 800 7 000 9 300 10 400 16 300 22 500