Div. B › Part 7 › 7.4 › 7.4.10 — Hydraulic Loads

7.4.10.8 — Hydraulic Loads on Sanitary Horizontal Drain

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(1) Except as permitted by Article 7.4.10.7., the hydraulic load that is drained to a horizontal sanitary drainage pipe shall conform to Table 7.4.10.8., based on the size and slope.

(2) Horizontal sanitary drainage pipe shall be designed to carry no more than 65% of its full capacity.

Tables & Figures referenced

Table 7.4.10.8 : Maximum Permitted Hydraulic Load Drained to a Horizontal Sanitary Drainage Pipe : Forming Part of Sentences 7.4.10.6.(2) and 7.4.10.8.(1)

Loading Table 7.4.10.8…

OBC Definitions

Defined terms on this page

fixture

means a receptacle, plumbing appliance, apparatus or other device that discharges sewage or clear water waste, and includes a floor drain.

fixture unit

means , when applied to a drainage system, the unit of measure based on the rate of discharge, time of operation and frequency of use of a fixture that expresses the hydraulic load that is imposed by that fixture on the drainage system.

run

means the horizontal distance between two adjacent tread nosings on a stair.

sanitary drainage pipe

means all piping that conveys sanitary sewage to a place of disposal, including the sanitary building drain, sanitary building sewer, soil pipe, soil stack, waste stack and waste pipe but not the main sewer or piping in a sewage treatment plant.

size

means the nominal diameter by which a pipe, fitting, trap or other similar item is commercially designated.

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