Title AS 3500.3.1-1998 National plumbing and drainage - Stormwater drainage Performance requirements Licensee Licensed to LUU MINH LUAN on 26 Feb 2002 Conditions of use This is a licensed electronic copy of a document where copyright is owned or managed by Standards Australia International Your licence is a single user licence and the document may not be stored, transferred or otherwise distributed on a network You may also make one paper copy of this document if required Web Check-up AS 3500.3.1—1998 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian Standard™ National plumbing and drainage Part 3.1: Stormwater drainage— Performance requirements This Australian Standard was prepared by Committee WS/20, Stormwater It was approved on behalf of the Council of Standards Australia on 11 August 1998 and published on November 1998 The following interests are represented on Committee WS/20: Association of Consulting Engineers, Australia Association of Hydraulic Services Consultants, Australia Australian Aluminium Council Australian Chamber of Commerce and Industry Australian Chamber of Manufactures Australian Institute of Loss Adjusters Bureau of Meteorology (Australia) Department of Land and Water Conservation, N.S.W Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Department of Local Government and Planning, Qld Local Government Office, Tas Master Builders Australia Master Plumbers and Mechanical Services Association of Australia Master Plumbers Australia Metal Building Products Manufacturers Association (Australia) New Zealand Local Government Association New Zealand Manufacturers Federation New Zealand Water and Wastes Association Plastics and Chemical Industries Association (Australia) Plastics Institute of New Zealand Plumbing Industry Board, Victoria University of Technology, Sydney Department of Administrative Services — Australia Review of Australian Standards To keep abreast of progress in industry, Australian Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary It is important therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australian Standard’, which subscribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed Notification of any inaccuracy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken This Standard was issued in draft form for comment as DR 96170 AS 3500.3.1—1998 Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian Standard™ National plumbing and drainage Part 3.1: Stormwater drainage— Performance requirements Originated in part as part of AS CS3 — 1931 Previous editions AS 2180 — 1986 and AS 3500.3 — 1990 AS 2180 — 1986 and AS 3500.3 — 1990 revised, amalgamated and redesignated in part as AS 3500.3.1 — 1998 Published by Standards Australia (Standards Association of Australia) The Crescent, Homebush, NSW 2140 ISBN 7337 1983 X AS 3500.3.1 — 1998 PREFACE This Standard was prepared by the Joint Standards Australia / Standards New Zealand Committee WS/20, Stormwater, to supersede (in part) AS 2180 — 1986, Metal rainwater goods — Selection and installation, and AS 3500, National Plumbing and Drainage Code, Part — 1990: Stormwater drainage which will be withdrawn June 1999 This Standard is the result of a consensus among Australian and New Zealand representatives on the committee to produce it as an Australian Standard This Standard is part of a series as follows: AS 3500 National plumbing and drainage 3500.3.1 Part 3.1: Stormwater drainage — Performance requirements (this Standard) 3500.3.2 Part 3.2: Stormwater drainage — Acceptable solutions Stormwater drainage — Methods for verification (Part 3.3) is in the course of preparation Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The performance-based format was chosen to foster innovation and facilitate the introduction of new technologies This Standard specifies performance requirements that must be met in order for a stormwater drainage system to provide the expected level of protection for people and property from adverse effects of stormwater Part 3.2 specifies acceptable solutions that are deemed to satisfy Part 3.1 and the Building Codes of Australia and New Zealand, for materials and products, and design and installation of stormwater drainage systems Part 3.3 will specify methods for verification that are deemed to satisfy Part 3.1, for the design and testing of stormwater drainage systems Such methods are not exclusive This arrangement provides the flexibility for a design to utilize new technology where appropriate, while providing certainty for those wishing to use a set of ‘proven’ requirements © Copyright STANDARDS AUSTRALIA Users of Standards are reminded that copyright subsists in all Standards Australia publications and software Except where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia Permission may be conditional on an appropriate royalty payment Requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia Standards Australia will permit up to 10 percent of the technical content pages of a Standard to be copied for use exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia Standards Australia will also permit the inclusion of its copyright material in computer software programs for no royalty payment provided such programs are used exclusively in-house by the creators of the programs Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended or revised The number and date of the Standard should therefore be clearly identified The use of material in print form or in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty This policy may be varied by Standards Australia at any time 3 AS 3500.3.1 — 1998 CONTENTS Page Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited SCOPE REFERENCED DOCUMENTS DEFINITIONS OBJECTIVE FUNCTIONAL REQUIREMENT PERFORMANCE REQUIREMENTS DEEMED TO SATISFY 4 4 4 AS 3500.3.1 — 1998 STANDARDS AUSTRALIA Australian Standard National plumbing and drainage Part 3.1: Stormwater drainage — Performance requirements SCOPE This Standard specifies the performance requirements for materials and products, and design and installation of roof drainage systems, surface drainage systems and subsoil drainage systems REFERENCED DOCUMENTS Standard: Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS/NZS 3500 3500.0 3500.3.2 The following documents are referred to in this National plumbing and drainage Part 0: Glossary of terms Part 3.2: Stormwater drainage —Acceptable solutions DEFINITIONS For the purpose of this Standard, the definitions given in AS/NZS 3500.0 and AS/NZS 3500.3.2 apply OBJECTIVE The objective of this Standard is to — (a) minimize risks of injury or inconvenience to people and damage to property caused by stormwater; (b) protect stormwater drainage systems of a property, and the external stormwater drainage network, from damage; and (c) ensure that stormwater drainage systems will satisfy the requirements of Items (a) and (b) throughout their design lifetime FUNCTIONAL REQUIREMENT All components of a stormwater drainage system for a property shall provide protection against the adverse effects of stormwater flows PERFORMANCE REQUIREMENTS 6.1 Roof drainage systems 6.1.1 Average recurrence interval (ARI) Roof drainage systems shall be designed and installed in accordance with the following: (a) Where it is unlikely that adverse effects of stormwater flows would result in significant inconvenience or injury to people or damage to property, for rainfall events having an ARI of not less than 20 years (b) Where it is likely that adverse effects of stormwater flows would result in significant inconvenience or injury to people or damage to property, for rainfall events having an ARI of not less than 100 years 6.1.2 Overflow devices or measures Overflow devices or measures shall be installed where overtopping of the roof drainage system could cause significant monetary loss, property damage or personal injury, and shall be designed in accordance with Clause 6.1.1(b) taking into account the effect of obstructions and blockages 6.1.3 Watertightness All internal roof drainage system components shall be watertight COPYRIGHT 6.2 AS 3500.3.1 — 1998 Surface drainage systems 6.2.1 Minor storm performance Surface drainage systems shall be designed to dispose of stormwater flows from rainfall events having an ARI appropriate to the importance of the site and the severity of potential damage and injury that would result from the failure of such systems 6.2.2 Major storm performance Surface drainage systems and overflow paths, in combination, shall be designed for rainfall events having an ARI of 50 years or greater Adverse effects of stormwater flows shall not present a hazard to people or cause significant damage to property 6.3 Subsoil drainage systems Subsoil drainage systems for the removal of excess groundwater and the reduction of soil moisture levels shall be designed — (a) so as not to cause damage to buildings and other facilities by changing soil moisture conditions; and (b) with advice from a suitably qualified competent person having expertise in assessing soil and groundwater behaviour Licensed to LUU MINH LUAN on 26 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 6.4 Position and manner of discharge The position and manner of discharge of the stormwater drainage system shall be to the satisfaction of the appropriate authority 6.5 Stormwater drainage systems Stormwater drainage systems shall — (a) convey stormwater to a point of connection using gravity flow where possible; (b) avoid the likelihood of blockages; (c) avoid the likelihood of leakage and penetration by roots; (d) provide access for maintenance and clearing blockages; (e) avoid damage to the external stormwater drainage network where the stormwater is being discharged to such a network; (f) avoid the likelihood of damage from superimposed loads on normal ground, or building movements; (g) prevent the entry of sewage, trade waste or both; (h) prevent the entry of stormwater to a sanitary drainage system; and (i) avoid the likelihood of damage to buildings or site works, in particular during the construction phase 6.6 No point of connection Where a point of connection to a stormwater drainage network is not available, the stormwater drainage system shall be designed and installed to— (a) prevent the concentration of stormwater onto adjacent properties; and (b) prevent stormwater from entering a building DEEMED TO SATISFY The following are deemed to satisfy the performance requirements specified in Clause 6: (a) Acceptable solutions as specified in AS/NZS 3500.3.2 (b) Verification by design and analytical methods, supplemented, where required, by laboratory testing COPYRIGHT ... Standard™ National plumbing and drainage Part 3. 1: Stormwater drainage Performance requirements Originated in part as part of AS CS3 — 1 9 31 Previous editions AS 218 0 — 19 86 and AS 35 00. 3 — 19 90... and AS 35 00. 3 — 19 90 AS 218 0 — 19 86 and AS 35 00. 3 — 19 90 revised, amalgamated and redesignated in part as AS 35 00. 3. 1 — 19 98 Published by Standards Australia (Standards Association of Australia)... 214 0 ISBN 733 7 19 83 X AS 35 00. 3. 1 — 19 98 PREFACE This Standard was prepared by the Joint Standards Australia / Standards New Zealand Committee WS/20, Stormwater, to supersede (in part) AS 218 0