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