IS 1742 (1983): Code of practice for building drainage

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2 > 0 B Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge IS 1742 (1983): Code of practice for building drainage [CED24: Public Health Engineering.]__ ., _. ____ .. IS : 1742 - 1993 Indian Standard CODE OF practice FOR building drainage ( Second Revision ) Second Reprint JULY 1995 UDC 696*12/ 13 : 006 76 I )I . % .- .. 0 Copyright 1984 i, .. :: e* j I . d.. BUBEAU OF INDdN STANDARD~b I : MANAK BHAVAN, 9 BAHADUR SHAH ZAF AR MARG . _. _ - I ,, NEW DBLHl 110002 ~..:q& TV August 1984 _, IS : 1742 ; 1983 Indian Standard CODE OF practice FOR building drainage ( Second Revision ) Water Supply and Sanitation Sectional Committee, BDC 24 Chairman Representing SHRI J. D CRUZ Water Supply and Sewage Disposal Undertaking, New Delhi Members CHIEB ENQINEER ( CIVIL I ) ( Alternate to Shri J.

3 D Cruz ) ADVISER ( PHE ) Ministry of Works and Housing, New Delhi DEPUTY ADVISER ( PHE ) (Alternate ) SHBI N. S. BHAIRAVAN Public Health Engineering Department, Govern- ment of Kerala, Trivandrum SUPEBINTENDINQ ENGINEER ( Alternate ) SHRI I. CHANDBA Public Works Department, Public Health Branch, SHRI K. K. GANDHI ( Alternate) Government of Haryana, Chandigarh CHIEF ENGINEER ( CONSTKUCTION) Uttar Pradesh Jal Nigam, Lucknow SUPERINTENDINO EYQINEER ( Alternate ) Snnr R. C. P. CHAUD~ARY Engineers India Ltd, New Delhi SHRI H. V. RAO ( Alternate ) SHRI S. K. DAS~~PTA Calcutta Metropolitan Development Authority, Calcutta SHRI S. R. MUKHERJEE ( Alternate ) M. DAVE Institution of Engineers ( India ), Calcutta SHRI S. G. DEOLALIKA~~. In personal capacity ( Flat No. 403, Savitri Cinema Commerical Complex, .New Delhi ) SHRI B. R. N. GUPTA Ministry of Defence, Engineer-in-Chief s Branch, Army Headquarters SHRI K.

4 V. KI~ISHNA~CJHTHY ( Alternale ) HYDRAULIC E~GISEER Municipal Corporation of Greater Bombay, Bombay CHIEP EKGINEEK ( SEWERAGE PROJECTS: ) ( Alfcrt&e ) ( Continued on page 2 ) 0 Copyright 1984 BUREAU OF INDIAN STANDARDS This publication is protected under the Itzdinn Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. I ( Continwd from page 1 ) Members SEW R. A. KHANN~ Representing Public Health Department, Government of Madhva Pradesh. Bhonal SHRI D. K. MITRA ( Alternate I ) SERI I. S. BAWEJA ( Alternate II ) SEBI P. KRISHNAN Central Public Works Department, New Delhi SUIWEYOR OF WORKS-~ ( NDZ ) ( Alternate ) SHIZI M. Y. MADAN The Hindustan Construction Co Ltd, Bombay SHRI C. E. S. RAO ( Alternate ) SERI S. L. MAINI Public Works Department, Public Health Branch, Government of Puniab.

5 Patiala SHRI R. NATARAJAN Hindustan Dorr-Oliver-L&l, Bombay SHRI B. M. RAHUL ( Alternate ) PBOB K. J. NATH All India Institute of Hygiene and Public Health, Calcutta SHRI D. GUIN ( Alternate ) PBO~ V. RAMAN National Environmental Engineering Research Institute ( CSIR ), Nagpur SHRI S. R. KSRIRSA~AR ( AIlernotc ) SHRI RANJIT SIN~H Ministry of Railways DR A. V. R. RAO National Buildings Organization, New Delhi SHRI 0. P. RATRA ( Alternate ) SECRETARY Indian Water Works Association, Bombay SECRETARY GENERAL Institution of Public Health Engineers India, Calcutta SHRI R. N. BANERJEE ( Alternate ) SHRI L. R. SEH~AL L. R. Sehgal & Co, New Delhi SHRI S. K. SHAKMA Central building Research Institute ( CSIR ), Roorkee SHRI B. N. THYA~ARAJA Bangalore Water Supply and Sewerage Board, Bangalore SERI H. S. PUTTA~EXPANNA ( Alternate ) Madras Metropolitan Water Supply and Sewerage Board.

6 Madras SHRI S. DAIVAXANI ( Alternate) SHR~ G. RAMAN. Director General, IS1 ( Ex-o$icio Member ) Director ( Civ Engg ) Secretary SHRI A. K. AVASTHY Assistant Director ( Civ Engg ), IS1 drainage Subcommittee, BDC 24 : 2 Conuener SHRI P. G. JOSHI Members Municipal Corporation of Greater Bombay, Bombay DEPUTY CHIEF ENQINEER ( SEWERAGE ) ( Alternate to Shri P. G. Joshi ) AynWc;;;;; CHIEF ENQ~NEER Delhi Municipal Corporation, New Delhi DEPUTY drainage ENGINEER (Alternate) ( Continued on page 50 ) II 2 Indian Standard CODE OF practice FOR building drainage ( Second Revision ) 0. FOREWORD The Indian Standard ( Second Revision ) was adopted by the Indian Standards Institution on 30 November 1983, after the draft finalized by the Water Supply and Sanitation Sectional Committee had been approved by the Civil Engineering Division Council. This standard, published in 1960 and subsequently revised in 1972 was intended to bring out a long felt uniformity in the variety of drainage practices followed by various Municipal Corporation, Municipalities and other bodies in the country in efficient drainage of surface and subsoil water and sewage from buildings to public sewers.

7 It is being revised to incorporate improvements found necessary in the light of the usage of the standard. This code of practice represents a standard of good przctice and, there- fore, takes the form of recommendations. For the purpose of deci,ding whether a particular requirement of this standard is complied with, the final value, observed or calculated, express- ing the result of a test or analysis, shall be rounded off in accordance with IS : 2-lC,60*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. 1. SCOPE This code gives recommendations for the design, layout, construction and maintenance of drains for waste water, surface water and subsoil water and sewage together with all ancilliary works, like connections, manholes, inspection chambers, etc, used within the building and from the building to the connection to a public sewer or to treatment works, a cesspool, a soakaway or a water course.

8 *Rules for roundiilg off numerical values ( wised ). 3 IS:1742 - 1985 2. TJUUWINOLOGY For the purpose of this standard, the following definitions shall apply. Authority - An individual, an official, a board, a department or an agency established and authorised by Union or State Government or any statutory body created by law who undertakes to administer and enforce the provisions of this code as adopted or amended. Barrel - That portion of a pipe in which the diameter and wall thick- ness remain uniform throughout. Bedding - The material on which the pipe is laid and which provides support for the pipe. Bedding can be concrete, granuIar material or the prepared trench bottom. Benching - Sloping surfaces constructed on either side of channels at the base of a manhole or inspection chamber for the purpose of confining the flow of sewage, avoiding the accumulation of deposits and providing a safe working platform.

9 Chair - A bed of concrete or other suitable material on the trench floor to provide a support for the pipes at intervals. Channel - The open waterway through which sewage, storm water or other liquid waste Aow at the invert of a manhole or an inspection chamber. Cleaning Eye - An access opening in a pipe or pipe fitting arranged to facilitate the clearing or obstructions and fitted with removable cover. Connection - The junction of a foul water drain, surface water drain or sewer from building or buildings with public sewer treatment works cesspool, soakaway or other water courses. Cover - a) A removable plate for permitting access to a pire to a fitting vessel or appliance. b) The vertical distance between the top of the barrel of a buried pipe or other construction and the surface of the ground. Depth of Manhole - The vertical distance from the top of the manhole cover to the outgoing invert of the main drain channel.

10 Diameter - The nominal internal diameter of a pipe. Drain - A conduit or channel for the carriage of storm water, sewerage or other used water. 4 lSt1742-1983 drainage the purpose. - The removal of any liquid by a system constructed for drainage Work - The design and construction of a system of drainage . Drop Connection - A length of conduit installed vertically immediate1 y before its connection to a sewer or to another drain. Drop Manhole - A inanhole installed in a, sewer where the eleva- tion of the incoming sewer considerably exceeds that of the outgoing sewer; a vertical waterway outside the manhole is provided to divert the waste water from the upper to the lower level- so that it does not fall freely into the manhole except at peak rate of flow. Formation - The finished level of the excavation at the bottom of a trench or heading prepared to receive the permanent work.