Standard

UPDATE AVAILABLE

AS/NZS 3500.3:2015

[Superseded]

Plumbing and drainage, Part 3: Stormwater drainage

Included in NCC Primary References Historical Editions, Supplements and Amendments Set

Sets out requirements for materials, design, installation and testing of roof drainage systems, surface drainage systems and subsoil drainage systems to a point of connection.

Published: 02/03/2015

Pages: 175

Table of contents

Cited references

Content history

Table of contents

Header

About this publication

Preface

1 Scope and general

1.1 Scope

1.2 Application

1.3 Normative references

1.4 Definitions

1.5 Abbreviations

1.5.1 General

1.5.2 Plastics

1.6 Notation

1.6.1 Quantity symbols

1.6.2 Flow chart symbols

1.6.3 Gradients

1.7 Identification

2 Materials and products

2.1 Scope of section

2.2 Selection and use

2.3 Roof drainage system

2.3.1 Roof drainage system components

2.3.2 Downpipes

2.3.3 Accessories and fasteners

2.4 Stormwater drains (non-pressure)

2.5 Rising mains (pressure)

2.6 Subsoil drains

2.7 Joints

2.7.1 Resin adhesives

2.7.1.1 General

2.7.1.2 Sealants

2.7.1.3 Silver brazing alloy

2.7.1.4 Soft solder

2.7.1.5 Solvent cement and priming fluid

2.7.2 Types

2.7.2.1 Bolted gland (BG)

2.7.2.2 Cement mortar (CM)

2.7.2.3 Elastomeric seals (ES)

2.7.2.4 Epoxy resin (ER)

2.7.2.5 Fusion welded (FW)

2.7.2.6 Mechanical coupling (MC)

2.7.2.7 Metal-banded flexible coupling (FC)

2.7.2.8 Silver brazed (SB)

2.7.2.9 Soft soldered (SS)

2.7.2.10 Solvent cement (SC)

2.8 Valves

2.8.1 Gate and globe

2.8.2 Non-return

2.8.3 Sluice

2.8.4 Wedge gate

2.9 Concrete and mortar

2.9.1 Concrete

2.9.2 Cement mortar

2.9.3 Chemical admixtures

2.9.4 Water for concrete and mortar

2.9.5 Steel reinforcement

2.10 Embedment material

2.10.1 Site stormwater drains

2.10.2 Subsoil drains

2.11 Trench fill

2.12 Miscellaneous

2.12.1 Clay building bricks

2.12.2 Concrete masonry units

2.12.3 Cover and sump grates

2.12.4 External protective coating

2.12.5 Fibreglass-reinforced plastic tanks

2.12.6 Geotextiles

2.12.7 Polyethylene sleeving

2.12.8 Precast or prefabricated pits and arresters

2.12.8.1 Concrete

2.12.8.2 Corrugated metal

2.12.8.3 Other materials

2.12.9 Timber

2.13 Filters for subsoil drains

2.13.1 Filter material

2.13.2 Geotextile filters

3 Roof drainage systems—Design

3.1 Scope of section

3.2 General method

3.3 Meteorological criteria

3.3.1 General

3.3.2 Snowfall effects

3.3.3 Wind effects

3.3.4 Average recurrence interval (ARI)

3.3.5 Rainfall intensity

3.3.5.1 Australia

3.3.5.2 New Zealand

3.4 Catchment area

3.4.1 General

3.4.2 Three-dimensional representation

3.4.3 Roof

3.4.3.1 Flat roof

3.4.3.2 Single sloping roof

3.4.3.3 Two adjacent sloping roofs

3.4.4 Vertical wall(s) and roof

3.4.4.1 Vertical wall with a flat roof

3.4.4.2 Vertical wall with a sloping roof

3.4.4.3 Vertical walls at right angles to each other

3.4.5 Higher catchment area

3.5 Eaves gutter systems

3.5.1 General

3.5.2 Design procedure

3.5.3 Vertical downpipes

3.5.4 Effective cross-sectional area of eaves gutters

3.6 Valley gutters

3.6.1 Limitations

3.6.2 Design procedure

3.6.3 Effective width

3.7 Box gutter systems

3.7.1 Limitations

3.7.2 Design procedure

3.7.3 Hydraulic capacity

3.7.4 Layout

3.7.5 Overflow devices

3.7.5.1 Hydraulic capacity

3.7.5.2 Operation

3.7.6 Downpipes

4 Roof drainage systems—Installation

4.1 Scope of section

4.2 Installation

4.3 Thermal variation

4.3.1 General

4.3.2 Expansion joints

4.4 Corrosion

4.4.1 Corrosion due to direct contact

4.4.2 Corrosion due to drainage

4.4.3 Corrosion due to crevices

4.4.4 Corrosion due to chemical incompatibility

4.5 Installation and testing

4.5.1 Installation

4.5.2 Testing

4.5.3 Eaves gutters

4.5.4 Box gutters

4.5.5 Valley gutters

4.5.6 Downpipes

4.6 Overflow devices or measures

4.7 Joints for metal components

4.7.1 General

4.7.2 Type of joints

4.7.2.1 Soldered

4.7.2.2 Sealant

4.7.3 Aluminium alloys

4.7.4 Aluminium/zinc and aluminium/zinc/magnesium alloy-coated steel

4.7.5 Stainless steel

4.7.6 Zinc and zinc-coated steel

4.8 Joints for other components

4.9 Support systems

4.9.1 Types

4.9.2 Criteria

4.9.3 Support systems for eaves gutters

4.9.4 Support systems for box gutters

4.9.5 Support systems for valley gutters

4.9.6 Support systems for downpipes

4.9.6.1 Vertical

4.9.6.2 Graded

5 Surface drainage systems—Design

5.1 Scope of section

5.2 Design

5.2.1 Methods

5.2.2 General criteria

5.2.3 Design rainfall intensity

5.3 Layout

5.3.1 General criteria for layouts

5.3.1.1 Roof areas

5.3.1.2 Other than roof areas

5.3.1.3 Ponding

5.3.1.4 Entry into buildings

5.3.1.5 Containment of harmful substances

5.3.1.6 Inlet and pit locations

5.3.1.7 Sanitary drainage system

5.4 General method

5.4.1 General

5.4.2 Overland flood path

5.4.3 Average recurrence interval (ARI)

5.4.4 Time of concentration

5.4.5 Rainfall intensity

5.4.6 Run-off coefficients

5.4.7 Catchment area

5.4.8 Determination of design flows

5.4.9 Design of open channels

5.4.10 Design of inlets

5.4.10.1 Sag pits

5.4.10.2 On-grade pits

5.4.11 Design of pipe drains

5.4.11.1 General

5.4.11.2 Design procedure

5.4.12 Design of surcharge outlets

5.4.12.1 General

5.4.12.2 Design procedure

5.5 Nominal method

6 Surface and subsoil drainage systems—Installation

6.1 Scope of section

6.2 General requirements

6.2.1 Products and joints

6.2.2 Terminology

6.2.3 Trench width

6.2.4 Over-excavation

6.2.5 Cover

6.2.6 Proximity to other services

6.2.7 Shoring and underpinning buildings

6.2.8 Installation near and under buildings

6.2.9 Water-charged ground

6.2.10 Trench fill

6.2.11 Backfilling

6.2.12 Excavation near point of connection

6.2.13 Corrosive areas

6.3 Site stormwater drains

6.3.1 General

6.3.1.1 Site stormwater drains

6.3.1.2 Site stormwater pipes

6.3.2 Connections to pits and arresters

6.3.3 Minimum diameter

6.3.4 Gradients

6.3.5 Embedment

6.3.5.1 Materials

6.3.5.2 Installation

6.3.6 Cover under buildings

6.3.7 In easements and public places

6.3.8 Disconnection

6.3.9 Testing

6.4 Subsoil drains

6.4.1 General

6.4.2 Embedment

6.4.2.1 Materials

6.4.2.2 Installation

6.4.2.3 Disconnection

7 Surface and subsoil drainage systems—Ancillaries

7.1 Scope of section

7.2 Paved surfaces

7.3 Reflux valves

7.3.1 Purpose

7.3.2 Location

7.3.3 Criteria

7.4 Inspection openings

7.4.1 Location

7.4.2 Size

7.4.3 Access

7.4.4 Plugs or caps

7.5 Stormwater pits, inlet pits and arresters

7.5.1 Purpose

7.5.1.1 Stormwater pits

7.5.1.2 Inlet pits

7.5.1.3 Arresters

7.5.2 Size

7.5.2.1 Stormwater and inlet pits

7.5.2.2 Arresters

7.5.3 Falls across pits

7.5.4 Inlets

7.5.5 Materials and construction

7.5.5.1 Rectangular or square pits and arresters

7.5.5.2 Circular pits

7.5.5.3 Conduits and channels

7.5.5.4 Ladders

7.5.5.5 Cement rendering

7.5.5.6 Upper walls of stormwater pits

7.5.5.7 Access openings

7.5.5.8 Construction joints

7.5.5.9 Inserts

7.5.5.10 Connections

7.6 Surcharge outlets

7.7 Junctions

7.7.1 General

7.7.2 Square junctions

7.8 Jump-ups

7.9 Anchor blocks

7.10 On-site stormwater detention (OSD) systems

7.10.1 General criteria

7.10.2 Below ground systems

7.10.3 Materials

8 Pumped systems

8.1 Scope of section

8.2 General requirements

8.3 Wet wells

8.3.1 General

8.3.2 Construction and materials

8.3.3 Base

8.3.4 Cover

8.3.5 Ladders

8.3.6 Combined effective storage

8.3.7 Alarm

8.3.8 Inlet

8.3.9 Sealing

8.4 Pumps

8.5 Rising mains

8.6 Electrical connection

9 Site testing

9.1 Scope of section

9.2 Downpipes, site stormwater drains and drains within or under buildings

9.3 Test criteria

9.3.1 Downpipes within buildings

9.3.2 Site stormwater drains, drains within and under buildings and main internal drains

9.3.3 Rising mains

9.4 Procedure

9.4.1 Water test

9.4.2 Air test

Appendix A

Appendix B

Appendix C

C1 Scope

C2 Roof plan

C2.1 Building with fewer than four floor levels

C2.2 Buildings with four or more floor levels

C3 Site plan

C4 Catchment plan

C5 Computation sheets

Appendix D

D1 Scope

D2 Procedures

D2.1 Australia

D2.2 New Zealand

Appendix E

E1 Scope

E2 Selected place references

E3 Five minutes duration rainfall intensities

Appendix F

F1 Scope

F2 10 minutes duration rainfall intensities

Appendix G

G1 Scope

G2 Full length (continuous) overflows

G3 Specifically located overflows

Appendix H

H1 Scope

H2 Example

H2.1 Problem

H2.2 Case 1—Sloping eaves gutter

H2.2.1 Calculation

H2.2.2 Solution

H2.3 Case 2—Flat eaves gutter

H2.3.1 Calculation

H2.3.2 Solution

Appendix I

Appendix J

J1 Scope

J2 Example 1: Box gutters, rainheads and downpipe

J2.1 Problem

J2.2 Calculation

J3 Example 2: Box gutters, sump/side overflow devices and downpipes

J3.1 Problem

J3.2 Calculation

J4 Example 3: Box gutters, sump/high-capacity overflow devices and downpipes

J4.1 Problem

J4.2 Calculation

Appendix K

K1 Scope

K2 Example 1: Nominal method

K2.1 Problem

K2.2 Solution

K2.2.1 Layout

K2.2.2 Site stormwater drains

K2.3 Stormwater pits

K3 Example 2: General method—Villa home development

K3.1 Problem

K3.2 Assumptions

K3.3 Solution

K3.3.1 Preliminary

K3.3.2 Procedure

K4 Example 3: General method—Warehouse

K4.1 Problem

K4.2 Assumptions

K4.3 Solution

K4.3.1 Preliminary

K4.3.2 Procedures

Appendix L

Appendix M

M1 Scope

M2 Purpose

M3 Types

M4 Layout

M4.1 General arrangement

M4.2 Drains

M4.3 Specifications—Filters

M5 Design considerations

M5.1 Drain dimensions and spacings

M5.2 Design of conduits

M5.3 Pipe gradient

Appendix N

N1 Scope

N2 Protection of works

N2.1 Roof drainage systems

N2.2 Surface drainage and subsoil drainage systems

N3 Discharge point criteria

N3.1 Position and manner of discharge

N3.2 Stormwater drainage plans

N4 Transport, handling and storage

N5 Inspection and cleaning

N6 Alterations and disconnection

N7 Layout

N7.1 General

N7.2 Influences on layout

N8 Surface drainage systems—Design

N8.1 Concentrated discharges to streets

N8.2 Snowfall effects

N9 Subsoil drainage systems—Design

N10 Erosion and sediment controls

N11 Other than stable grounds

N12 Above-ground systems

Cited references in this standard

AS 3996:2019

[Current]

Access covers and grates

AS 3571.2-2009

[Current]

Plastics piping systems - Glass reinforced thermoplastics (GRP) systems based on unsaturated polyester (UP) resin, Part 2: Pressure and non-pressure water supply (ISO 10639:2004, MOD)

AS 3579-1993

[Superseded]

Cast iron wedge gate valves for general purposes

AS 3600:2018 Sup 1:2022 Amd 1:2024

[Current]

Concrete structures - Commentary (Supplement 1 to AS 3600:2018)

AS 3648-1993

[Withdrawn]

Specification and methods of test for packaged concrete mixes

Content history

AS/NZS 3500.3:2018

[Available Superseded]