AS 3500.3-1990

1 - AS 3500.3-1990 NATIONAL PLUMBING AND DRAINAGE CODE - STORMWATER DRAINAGE
4 - PREFACE
5 - CONTENTS
7 - FOREWORD
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE
8 - 1.2 APPLICATION
8 - 1.2.1 General
8 - 1.2.2 New materials and methods
8 - 1.2.3 Unusual installations
8 - 1.3 REFERENCEDDOCUMENTS
8 - 1.4 DEFINITIONS
8 - 1.5 PIPEGRADIENTS
8 - 1.6 CLASSIFICATIONOFSOILS
8 - 1.7 CLASSIFICATIONOFBUILDINGS
8 - 1.8 FIRERESISTANCELEVEL(FRL)
8 - 1.9 SAFETY
9 - SECTION 2 MATERIALS AND PRODUCTS
9 - 2.1 SCOPE OF SECTION
9 - 2.2 AUTHORIZATION
9 - 2.3 SELECTION AND USE
9 - 2.4 ROOFS AND COMPONENTS
9 - 2.5 PIPES AND FITTINGS FOR NON-PRESSURE APPLICATIONS
9 - 2.5.1 Cast iron
9 - 2.5.2 Copper pipes
9 - 2.5.3 Copper alloy pipes
9 - 2.5.4 Copper and copper alloy fittings
9 - 2.5.5 Fibre reinforced cement (FRC)
9 - 2.5.6 Galvanized steel
10 - 2.5.7 Glass filament reinforced thermo setting plastics (GRP) pipes
10 - 2.5.8 Reinforcedconcretepipes
10 - 2.5.9 Unplasticized polyvinyl chloride (UPVC)
10 - 2.5.10 Vitrified clay
10 - 2.6 PIPES AND FITTINGS FOR PRESSURE APPLICATIONS
10 - 2.7 PIPES AND FITTINGS FOR SUBSOIL DRAINS
10 - 2.7.1 Specification
10 - 2.7.2 Limitation on use
10 - 2.8 JOINTING COMPONENTS
10 - 2.8.1 Rubber rings
10 - 2.8.2 Silver brazing alloy
10 - 2.8.3 Soft solder
11 - 2.8.4 Solvent cement and priming fluid
11 - 2.9 VALVES
11 - 2.9.1 Cast iron and ductile iron
11 - 2.9.2 Copper alloy
11 - 2.9.3 UPVC
11 - 2.9.4 Cast iron, UPVC, copper alloy or PVC coated steel
11 - 2.10 CONCRETEAND MORTAR
11 - 2.10.1 Cement
11 - 2.10.2 Fine aggregate (sand)
11 - 2.10.3 Coarse aggregate (metal)
11 - 2.10.4 Concrete mix
11 - 2.10.5 Cement mortar
11 - 2.10.6 Chemical admiztures
11 - 2.10.7 Water for concrete and mortar
11 - 2.10.8 Steel reinforcement
11 - 2.11 BEDDING MATERIAL
11 - 2.11.1 Stormwater drains
11 - 2.11.2 Sub soildrains
11 - 2.12 BACKFILL MATERIAL
11 - 2.13 MISCELLANEOUS
11 - 2.13.1 Timber
11 - 2.13.2 Epoxy resins
11 - 2.13.3 Geotextiles
11 - 2.13.4 Pre-cast pits and arrestors
11 - 2.13.5 Bricks
11 - 2.13.6 Test sieves
11 - 2.13.7 Fibreglass reinforced plastic tanks
12 - SECTION 3 DESIGN
12 - 3.1 SCOPE OF SECTION
12 - 3.2 ROOF WATER SYSTEM
12 - 3.2.1 General
12 - 3.2.2 Layout, size and installation
12 - 3.3 SUBSOIL SYSTEM
12 - 3.3.1 General
12 - 3.3.2 Layout
12 - 3.3.3 Spacing
12 - 3.3.4 Size
12 - 3.3.5 Gradient
12 - 3.3.6 Installation
13 - 3.4 SURFACE WATER SYSTEM
13 - 3.4.1 General
13 - 3.4.2 Rainfall intensities
13 - 3.4.3 Layout
13 - 3.4.4 Size
13 - 3.4.5 Paved and unpaved areas
14 - 3.5 GRADIENTS OF STORMWATER DRAINS
14 - 3.5.1 Minimum
14 - 3.5.2 Steep
14 - 3.5.3 Anchorblocks
14 - 3.6 STORMWATER DRAINS IN EASEMENTS, AND PUBLIC PLACES
14 - 3.6.1 Roads, easements and public places
14 - 3.6.2 Easements
14 - 3.6.3 Public roads and rights of way
14 - 3.7 PROXIMITY TO OTHER SERVICES
14 - 3.7.1 Electrical cables and gas pipes
16 - 3.7.2 Sanitary drains and water services
16 - 3.7.3 Crossovers
16 - 3.8 DEPTH OF COVER FOR STORMWATER DRAINS
16 - 3.8.1 General
16 - 3.8.2 With adequate cover
16 - 3.8.3 Without adequate cover
16 - 3.8.4Under buildings
16 - 3.9 BUILDING OVER STORMWATER AND SUBSOIL DRAINS
16 - 3.9.1 Alterations and additions to buildings
16 - 3.9.2 Proximity to footings and foundations
17 - 3.10 CONNECTIONS TO STORMWATER DRAINS UNDER BUILDINGS
17 - 3.10.1 Downpipes
17 - 3.10.2 Reinforced concrete or vitrified clay risers
17 - 3.11 RE-USE OF EXISTING STORMWATER DRAINS
18 - SECTION 4 APPURTENANCES
18 - 4.1 SCOPE OF SECTION
18 - 4.2 POINT OF CONNECTION
18 - 4.2.1 General
18 - 4.2.2 Protection of stormwater mains
18 - 4.3 STORMWATER DRAINS
18 - 4.3.1 General
18 - 4.3.2 Below ground
18 - 4.3.3 Above ground under buildings
18 - 4.4 REFLUX VALVES
18 - 4.4.1 Location
18 - 4.4.2 Requirements
18 - 4.4.3 Reflux valve chambers
18 - 4.4.4 Below slabs or other obstructions
19 - 4.5 INSPECTION OPENINGS
19 - 4.5.1 General
19 - 4.5.2 Location
19 - 4.5.3 Size
19 - 4.5.4 Types
19 - 4.5.5 Access within buildings
19 - 4.5.6 Sealing
19 - 4.6 STORMWATER PITS, INLET PITS AND ARRESTORS
19 - 4.6.1 Purpose
19 - 4.6.2 Size
21 - 4.6.3 Material
21 - 4.6.4 Construction
22 - 4.6.5 Differential settlement
22 - 4.7 JUNCTIONS OF STORMWATER DRAINS
22 - 4.7.1 General
23 - 4.7.2 Square junctions
23 - 4.7.3 Down pipes
23 - 4.8 JUMP-UPS
23 - 4.9 DISCONNECTION OF SUBSOIL AND SURFACEWATER SYSTEMS
25 - SECTION 5 EXCAVATION, BEDDING, SUPPORT AND BACK FILLING
25 - 5.1 SCOPE OF SECTION
25 - 5.2 EXCAVATION
25 - 5.2.1 Safety
25 - 5.2.2 Trench dimensions
25 - 5.2.3 Over-excavation
25 - 5.2.4 Near point of connection
25 - 5.2.5 Water-charged ground
25 - 5.2.6 Shoring and underpinning buildings
25 - 5.3 STORMWATER DRAINS IN TRENCHES
25 - 5.3.1 General
25 - 5.3.2 Bedding material
25 - 5.3.3 Installation
26 - 5.3.4 Support in water-charged, unstable or filled ground
27 - 5.3.5 Backfill material
27 - 5.3.6 Backfilling
27 - 5.4 STORMWATER DRAINS IN OTHER THAN TRENCHES
27 - 5.4.1 Tunnel
28 - 5.4.2 Bored hole
28 - 5.5 SUBSOIL DRAINS
28 - 5.5.1 General
28 - 5.5.2 Bedding material
28 - 5.5.3 Installation
28 - 5.5.4 Backfill material
28 - 5.5.5 Backfilling
28 - 5.6 LAND SLIP AREAS
28 - 5.6.1 General
28 - 5.6.2 Classification
28 - 5.6.3 Construction
29 - 5.7 MINE SUBSIDENCE AREAS
29 - 5.7.1 General
29 - 5.7.2 Pipes and fittings
29 - 5.7.3 Construction
29 - 5.8 EXPANSIVE SOIL
31 - SECTION 6 PIPEWORK
31 - 6.1 SCOPE OF SECTION
31 - 6.2 LOCATION
31 - 6.3 SUPPORT AND FIXING
31 - 6.3.1 Brackets, clips and hangers
32 - 6.3.2 Prohibited supports
32 - 6.4 CONCEALMENT
32 - 6.4.1 Access
32 - 6.4.2 Structural concrete
32 - 6.4.3 Drywall construction
32 - 6.4.4 Common walls
32 - 6.4.5 Extension of inspection openings
32 - 6.5 TESTING AND INSPECTION OPENINGS
32 - 6.6 JOINTING
32 - 6.6.1 General
32 - 6.6.2 Methods
32 - 6.7 DISUSE OF ROOF WATER SYSTEM
32 - 6.8 IDENTIFICATION OF PIPES
34 - SECTION 7 PUMPED DISCHARGE
34 - 7.1 SCOPE OF SECTION
34 - 7.2 GENERAL
34 - 7.3 WET WELLS
34 - 7.3.1 General
34 - 7.3.2 Construction and materials
34 - 7.3.3 Base
34 - 7.3.4 Cover
34 - 7.3.5 Ladders
34 - 7.3.6 Effective storage
34 - 7.3.7 Alarm
34 - 7.3.8 Inlet
34 - 7.3.9 Sealing
34 - 7.4 PUMPS
34 - 7.5 RISING MAINS
34 - 7.6 ELECTRICAL CONNECTION
35 - SECTION 8 TESTING OF STORMWATER INSTALLATIONS
35 - 8.1 SCOPE OF SECTION
35 - 8.2 INTERNAL GUTTERS AND DOWN PIPES
35 - 8.3 STORMWATER DRAINS IN OR UNDER BUILDINGS
35 - 8.3.1 General
35 - 8.3.2 Water test
35 - 8.3.3 Air test
36 - 8.4 RISING MAINS
36 - 8.5 ROOF WATER SYSTEMS
37 - APPENDIX A - REFERENCED DOCUMENTS
39 - APPENDIX B - EQUIVALENT PIPE GRADIENTS
40 - APPENDIX C - CLASSIFICATION OF BUILDINGS AND STRUCTURES
40 - C1 SCOPE
40 - C2 PRINCIPLES OF CLASSIFICATION
40 - C3 CLASSIFICATIONS
40 - C4 MULTIPLE CLASSIFICATION
42 - APPENDIX D - SIMPLIFIED RATIONAL METHOD
42 - D1 SCOPE
42 - D2 PROCEDURE
42 - D3 WORKED EXAMPLE
44 - APPENDIX E - MINIMUM AND MAXIMUM DEPTH OF COVER OVER STORMWATER DRAINS

Specifies uniform requirements for the installation of stormwater plumbing and stormwater drainage up to the Regulatory Authority's point of connection. This Standard applies to new installations as well as alterations, additions and repairs to existing installations. Reference is made to the relevant Australian Standards dealing with methods for the sizing of roofwater systems.

This Standard sets out materials and products, design and installation requirements for stormwater plumbing and stormwater drainage up to the Regulatory Authority's point(s) of connection. The Standard applies to new installations as well as alternations, additions, and repairs to existing installations.

First published as AS 3500.3-1990.