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S T A N D A R D S

S T A N D A R D S. AS/NZS 2179.1:1994 Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater goods, and metal accessories and fasteners. AS 3500.3.1:1998 National plumbing and drainage

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S T A N D A R D S

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  1. S T A N D A R D S

  2. AS/NZS 2179.1:1994 Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater goods, and metal accessories and fasteners AS 3500.3.1:1998 National plumbing and drainage Part 3.1: Stormwater drainage - Performance requirements AS/NZS 3500.3.2:1998 National plumbing and drainage Part 3.2: Stormwater drainage - Acceptable solutions

  3. AS/NZS 2179.1:1994 Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater goods, and metal accessories and fasteners 1.1 SCOPE This Standard specifies requirements for pre-painted metal, metal and organic film/metal laminated shape or sheet rainwater goods, and metal accessories and fasteners. 3.8 EFFECTIVE CROSS-SECTIONALAREA The effective cross-sectional area (to the nearest 100 mm²) for each nominal size of eaves gutter, valley gutter and downpipe shall be supplied by the manufacturer. The effective cross-sectional area for each shall be as follows: (a) For an eaves gutter and support system— (i) it is the cross-sectional area beneath a line not less than 10 mm below the overflow, e.g. front bead, gutter back or bottom of overflow slots; or 4.1 GENERAL One or more of the performance tests shall be used to demonstrate the compliance of a gutter or downpipe and support system

  4. AS 3500.3.1:1998 National plumbing and drainage Part 3.1: Stormwater drainage - Performance requirements 1 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.

  5. AS 3500.3.1:1998 National plumbing and drainage Part 3.1: Stormwater drainage - Performance requirements 6 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. Australian/New Zealand Standard TM AS/NZS 3500.3.2:1998 National plumbing and drainage Part 3.2: Stormwater drainage -Acceptable solutions Building Code of Australia primary referenced Standard

  7. AS/NZS 3500.3.2:1998 SECTION 3 ROOF DRAINAGE SYSTEMS - DESIGN

  8. ARI = 20 years TABLE 3.1 AVERAGE RECURRENCE INTERVAL

  9. ARI = 20 years (PART OF) FIGURE E4 AREA 2 - RAINFALL INTENSITIES (mm/h) FOR 5 MINUTES DURATION AND AN ARI OF 20 YEARS rainfall intensity = 210 mm/h 210 SYDNEY

  10. ARI = 20 years 15 8 12 4 Pitch 23.5° 9 6 rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² Pitch 23.5°

  11. ARI = 20 years 1.9 rainfall intensity = 210 mm/h 15 x 8 = 120 1.8 + 6 x 4 = 24 1.7 (Ah) 144 m² 1.6 VALUES OF (F) 1.5 1.4 1.3 1.2 1.1 1 0 5 10 15 20 25 30 35 40 45 50 55 SLOPE OF ROOF GUTTERS (DEGREES) FIGURE 3.4 CATCHMENT AREA - SLOPE FACTOR, F, (FOR EAVES GUTTER ONLY) x 1.2 (F) (Ac) 174 m² 1.21 23.5

  12. ARI = 20 years rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² x 1.2 (F) (Ac) 174 m² 10 mm minimum 5900 mm² 4.8 EAVES GUTTERS Eaves gutters shall be installed as follows: (a) Gradients Deviations from nominal gradients shall be smooth and not cause permanent ponding. NOTES: 1. Where a building is likely to move due to reactive soils, gradients may need to be not flatter than - (a) 1:250 to achieve an effective gradient not flatter than 1:500; or (b) 1:500 to achieve an effective gradient with no permanent ponding. Gradient 1 : 500 Smoothline Ae = 5900 mm²

  13. ARI = 20 years rainfall intensity = 210 mm/h 100 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS FLATTER THAN 1 : 500 15 x 8 = 120 90 + 6 x 4 = 24 80 (Ah) 144 m² 70 x 1.2 (F) 50 60 (Ac) 174 m² Gradient 1 : 500 50 CATCHMENT AREA PER VERTICAL DOWNPIPE (Ac) m² Smoothline Ae = 5900 mm² 200 250 100 150 300 350 500 400 450 40 30 20 DESIGN RAINFALL INTENSITY mm / h 10 0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 4.0 5.3 6.7 8.0 9.4 10.7 12.0 13.4 14.7 16.0 17.4 18.7 20.1 21.4 22.7 24.1 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS OF 1 : 500 AND STEEPER TOTAL FLOW IN EAVES GUTTER (L / s) FIGURE 3.6 REQUIRED SIZE OF EAVES GUTTERS 0.68 1.0 2.0 3.0 4.0 5.0 6.0 6.38

  14. ARI = 20 years rainfall intensity = 210 mm/h 100 15 x 8 = 120 90 + 6 x 4 = 24 80 (Ah) 144 m² 70 x 1.2 (F) 50 60 (Ac) 174 m² Gradient 1 : 500 50 Smoothline Ae = 5900 mm² 200 250 100 150 300 350 500 400 450 40 30 20 10 0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 4.0 5.3 6.7 8.0 9.4 10.7 12.0 13.4 14.7 16.0 17.4 18.7 20.1 21.4 22.7 24.1 0.68 1.0 2.0 3.0 4.0 5.0 6.0 6.38 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS FLATTER THAN 1 : 500 CATCHMENT AREA PER VERTICAL DOWNPIPE (Ac) m² Acdp = 28 m² min number of downpipes 28 174 / 28 = 7 DESIGN RAINFALL INTENSITY mm / h 5.9 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS OF 1 : 500 AND STEEPER TOTAL FLOW IN EAVES GUTTER (L / s) FIGURE 3.6 REQUIRED SIZE OF EAVES GUTTERS

  15. ARI = 20 years 15 rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² 24 m² 24 m² 24 m² x 1.2 (F) 8 (Ac) 174 m² 24 m² Gradient 1 : 500 12 28 m² 25 m² Smoothline Ae = 5900 mm² Acdp = 28 m² 25 m² min number of downpipes 4 174 / 28 = 7 Pitch 23.5° 9 6 DP - E HP DP - D HP DP - C HP HP DP - B DP - F HP DP - G HP HP DP - A

  16. ARI = 20 years rainfall intensity = 210 mm/h TABLE 3.2 EAVES GUTTER—REQUIRED SIZE OF VERTICAL DOWNPIPE 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² x 1.2 (F) (Ac) 174 m² Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² min number of downpipes 174 / 28 = 7 min downpipe size = 85 dia

  17. ARI = 20 years 15 rainfall intensity = 210 mm/h 15 x 8 = 120 DP - E HP DP - D HP DP - C + 6 x 4 = 24 (Ah) 144 m² 24 m² 24 m² 24 m² x 1.2 (F) 8 HP HP (Ac) 174 m² 24 m² Gradient 1 : 500 12 28 m² 25 m² Smoothline Ae = 5900 mm² DP - B Acdp = 28 m² DP - F HP DP - G HP 25 m² min number of downpipes 4 174 / 28 = 7 Pitch 23.5° min downpipe size = 85 dia HP DP - A 9 6 As-c (downpipe G) = 28 m²

  18. ARI = 20 years rainfall intensity = 210 mm/h 100 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS FLATTER THAN 1 : 500 15 x 8 = 120 90 + 6 x 4 = 24 80 (Ah) 144 m² 70 x 1.2 (F) 50 60 (Ac) 174 m² Gradient 1 : 500 50 CATCHMENT AREA PER VERTICAL DOWNPIPE (Ac) m² Smoothline Ae = 5900 mm² 200 250 100 150 300 350 500 400 450 40 Acdp = 28 m² 30 min number of downpipes 20 174 / 28 = 7 DESIGN RAINFALL INTENSITY mm / h 10 min downpipe size = 85 dia As-c (downpipe G) = 28 m² 0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 4.0 5.3 6.7 8.0 9.4 10.7 12.0 13.4 14.7 16.0 17.4 18.7 20.1 21.4 22.7 24.1 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS OF 1 : 500 AND STEEPER TOTAL FLOW IN EAVES GUTTER (L / s) FIGURE 3.6 REQUIRED SIZE OF EAVES GUTTERS 0.68 1.0 2.0 3.0 4.0 5.0 6.0 6.38 28 total flow = 1.65 L/s 1.65

  19. ARI = 20 years 15 rainfall intensity = 210 mm/h 15 x 8 = 120 DP - E HP DP - D HP DP - C + 6 x 4 = 24 (Ah) 144 m² 24 m² 24 m² 24 m² x 1.2 (F) 8 HP HP (Ac) 174 m² 24 m² Gradient 1 : 500 12 28 m² 25 m² Smoothline Ae = 5900 mm² DP - B Acdp = 28 m² DP - F HP DP - G HP 25 m² min number of downpipes 4 174 / 28 = 7 Pitch 23.5° min downpipe size = 85 dia HP DP - A As-c (downpipe G) = 28 m² 9 6 total flow = 1.65 L/s 4 Length of gutter (G) = 4 m Ave flow per metre of gutter 1.65 / 4 = 0.4 L / s

  20. ARI = 20 years TABLE G1 MINIMUM hf VALUES rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² x 1.2 (F) (Ac) 174 m² Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² hf flashing min number of downpipes hf 174 / 28 = 7 30 mm min min downpipe size = 85 dia hf As-c (downpipe G) = 28 m² total flow = 1.65 L/s Length of gutter (G) = 4 m 10 mm min Ave flow per metre of gutter 1.65 / 4 = 0.4 L / s hf = 14 mm

  21. ARI = 20 years rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² x 1.2 (F) (Ac) 174 m² Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² min number of downpipes 174 / 28 = 7 min downpipe size = 85 dia As-c (downpipe G) = 28 m² total flow = 1.65 L/s Length of gutter (G) = 4 m Ave flow per metre of gutter 1.65 / 4 = 0.4 L / s hf = 14 mm

  22. C O N C L U S I O N many years experience in home & industrial building markets huge range of products backed by a national company extensive industry knowledge commitment to customer service Smoothline offers unique features & benefits

  23. T H A N K - Y O U

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