AS/NZS 3500.3:2021 Plumbing and drainage, Part 3: Stormwater drainage
Standards Australia/Standards New Zealand
Supersedes: AS/NZS 3500.3:2018 Plumbing and drainage, Part 3: Stormwater drainage
Draft Designation: DR AS/NZS 3500.3:2020The objective of this document is to provide stormwater drainage solutions for compliance with —
(a) the National Construction Code (NCC); and
(b) the New Zealand Building Code (NZBC), Clause E1 Surface Water.
A list of all parts in the AS/NZS 3500 series for plumbing and drainage can be found in the Standards Australia and Standards New Zealand online catalogues.
The major changes in this revision are as follows:
(i) Definitions have been relocated to AS/NZS 3500.0 for consistency across the series.
(ii) Design rainfall intensities are now expressed in terms of the Annual Exceedance Probability (AEP) values to reflect the practice of the Australian Bureau of Meteorology (BOM) and the performance requirements of NZBC Clause E1 Surface Water. There has been no change in the requirements or the calculations, and the original ARI values are shown for comparison.
(iii) The 5 min duration rainfall intensities for representative places in Australia given in Table D.1 have been updated to show the latest values from the BOM.
(iv) The New Zealand rainfall maps have been replaced by Table E.1 showing 10 % AEP (10 years ARI) and 2 % AEP (50 years ARI) rainfall intensities for selected locations.
(v) The range of materials that can be used for wet wells has been expanded to encompass prefabricated wells.
(vi) Changes have been made to the requirements for the marking of pipes in commercial buildings to assist in the better identification of pipework and avoiding cross connections.
(vii) The design rainfall intensities for balcony and terrace drainage systems in New Zealand have been included.
The terms “normative” and “informative” are used in documents to define the application of the appendices to which they apply. A “normative” appendix is an integral part of a document, whereas an “informative” appendix is only for information and guidance.
Notes or footnotes to tables or figures that are expressed in mandatory terms are deemed to be requirements of this document.
Notes to clauses in this document are informative only and do not include requirements.
NOTE Appendix M provides general information to users of the document.
Originated as part of AS CS 3-1931. Revised and redesignated as AS 2179-1978 and AS 2180-1978. AS 2180-1978 and part of AS 2179-1978 revised and designated AS 2180-1986.
Contents:
Section 1: Scope and general
Section 2: Materials and products
Section 3: Roof drainage systems — Design
Section 4: Roof drainage systems — Installation
Section 5: Surface water drainage systems — Design
Section 6: Surface and subsoil drainage systems — Installation
Section 7: Surface water and subsoil drainage systems — Ancillaries
Section 8: Pumped systems
Section 9: Site Testing
Section 10: Siphonic drainage systems
Appendix A: (informative) Site-mixed concrete for minor works
Appendix B: (informative) Stormwater drainage installation plans
Appendix C: (informative) Guidelines for determining rainfall intensities
Appendix D: (normative) Rainfall intensities for Australia
Appendix E: (normative) Rainfall intensities for New Zealand — 10 min duration
Appendix F: (informative) Examples of overflow measures for eaves gutters
Appendix G: (informative) General method for design of eaves gutter systems — Example
Appendix H: (normative) Box gutter systems — General method, design graphs and illustrations
Appendix I: (informative) Box gutter systems — General method — Examples
Appendix J: (informative) Surface water drainage systems — Nominal and general methods — Examples
Appendix K: (informative) Example calculation — Pumped system
Appendix L: (informative) Subsoil drainage systems — Design
Appendix M: (informative) General information
Appendix N: (informative) Operation of siphonic roof drainage systems
Plumbing and Drainage.
WS-014
Association of Hydraulic Services Consultants Australia; Australian Building Codes Board; Australian Industry Group; Australian Stainless Steel Development Association; Backflow Prevention Association of Australia; Engineers Australia; Hydraulic Consultants Association Australasia; International Copper Association Australia; Master Plumbers Australia and New Zealand; Master Plumbers, Gasfitters and Drainlayers New Zealand; Ministry of Business, Innovation and Employment (NZ); Plastics Industry Pipe Association of Australia; Plastics New Zealand; Plumbers, Gasfitters and Drainlayers Board (NZ); Plumbing Distributors Association of New Zealand; Plumbing Products Industry Group; The Institute of Plumbing Australia; Water New Zealand; Water Services Association of Australia.
