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S T A N D A R D S AS/NZS :1994 Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater. - ppt download
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Presentation on theme: "S T A N D A R D S AS/NZS :1994 Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater."— Presentation transcript:
5 S T A N D A R D S
6 AS/NZS :1994 Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater goods, and metal accessories and fasteners AS :1998 National plumbing and drainage Part 3.1: Stormwater drainage - Performance requirements AS/NZS :1998 National plumbing and drainage Part 3.2: Stormwater drainage - Acceptable solutions
7 Specifications for rainwater goods, accessories and fasteners
AS/NZS :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
8 National plumbing and drainage
AS :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.
9 National plumbing and drainage
AS :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.
11 primary referenced Standard Building Code of Australia
AS/NZS :1998 Australian/New Zealand Standard TM National plumbing and drainage Part 3.2: Stormwater drainage -Acceptable solutions primary referenced Standard Building Code of Australia
12 SECTION 3 ROOF DRAINAGE SYSTEMS - DESIGN
AS/NZS :1998 SECTION 3	ROOF DRAINAGE SYSTEMS - DESIGN
13 AVERAGE RECURRENCE INTERVAL
ARI = 20 years TABLE 3.1 AVERAGE RECURRENCE INTERVAL
14 rainfall intensity = 210 mm/h
ARI = 20 years rainfall intensity = 210 mm/h (PART OF) FIGURE E4 AREA 2 - RAINFALL INTENSITIES (mm/h) FOR 5 MINUTES DURATION AND AN ARI OF 20 YEARS 210 SYDNEY
15 rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m²
ARI = 20 years 15 9 6 8 4 12 Pitch 23.5° rainfall intensity = 210 mm/h 15 x 8 = 120 + 6 x 4 = 24 (Ah) 144 m² Pitch 23.5°
16 rainfall intensity = 210 mm/h ARI = 20 years
+ 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h ARI = 20 years 5 15 20 25 30 35 10 40 45 50 55 1 1.1 1.6 1.7 1.5 1.4 1.3 1.2 1.8 1.9 VALUES OF (F) 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
17 rainfall intensity = 210 mm/h
x 1.2 (F) + 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h (Ac) 174 m² ARI = 20 years 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 10 mm minimum 5900 mm²
18 rainfall intensity = 210 mm/h
x 1.2 (F) + 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h (Ac) 174 m² Gradient 1 : 500 Smoothline Ae = 5900 mm² ARI = 20 years 0.68 1.0 2.0 3.0 4.0 5.0 6.0 6.38 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 5.3 9.4 10.7 13.4 6.7 14.7 17.4 18.7 20.1 21.4 22.7 24.1 10 60 70 50 40 30 20 80 90 100 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS OF 1 : 500 AND STEEPER CATCHMENT AREA PER VERTICAL DOWNPIPE (Ac) m² FOR GRADIENTS FLATTER THAN 1 : 500 TOTAL FLOW IN EAVES GUTTER (L / s) DESIGN RAINFALL INTENSITY mm / h FIGURE 3.6 REQUIRED SIZE OF EAVES GUTTERS 50 100 350 400 300 250 200 150 450 500
19 rainfall intensity = 210 mm/h
+ 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² x 1.2 (F) Gradient 1 : 500 (Ac) 174 m² Smoothline Ae = 5900 mm² ARI = 20 years EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS FLATTER THAN 1 : 500 4.0 5.3 8.0 9.4 10.7 12.0 13.4 6.7 14.7 16.0 17.4 18.7 20.1 21.4 22.7 24.1 10 60 70 50 40 30 20 80 90 100 50 100 350 400 300 250 200 150 450 500 CATCHMENT AREA PER VERTICAL DOWNPIPE (Ac) m² Acdp = 28 m² 28 min number of downpipes 174 / 28 = 7 DESIGN RAINFALL INTENSITY mm / h 5.9 3.0 4.0 6.0 7.0 8.0 9.0 10.0 5.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS OF 1 : 500 AND STEEPER 0.68 1.0 2.0 3.0 4.0 5.0 6.0 6.38 TOTAL FLOW IN EAVES GUTTER (L / s) FIGURE 3.6 REQUIRED SIZE OF EAVES GUTTERS
20 rainfall intensity = 210 mm/h
+ 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 (Ac) 174 m² Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years 15 9 6 8 4 12 Pitch 23.5° DP - E HP DP - D HP DP - C 24 m² 28 m² 25 m² HP HP DP - B DP - F HP DP - G HP DP - A HP
21 EAVES GUTTER—REQUIRED SIZE OF VERTICAL DOWNPIPE
+ 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 (Ac) 174 m² Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years TABLE 3.2 EAVES GUTTER—REQUIRED SIZE OF VERTICAL DOWNPIPE min downpipe size = 85 dia
22 rainfall intensity = 210 mm/h
+ 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 (Ac) 174 m² Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years min downpipe size = 85 dia 15 9 6 8 4 12 Pitch 23.5° HP DP - A DP - B DP - C DP - D DP - E DP - F DP - G 24 m² 28 m² 25 m² As-c (downpipe G) = 28 m²
23 rainfall intensity = 210 mm/h
As-c (downpipe G) = 28 m² (Ac) 174 m² + 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years min downpipe size = 85 dia 0.68 1.0 2.0 3.0 4.0 5.0 6.0 6.38 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 5.3 9.4 10.7 13.4 6.7 14.7 17.4 18.7 20.1 21.4 22.7 24.1 10 60 70 50 40 30 20 80 90 100 EFFECTIVE CROSS-SECTIONAL AREA OF EAVES GUTTER (Ae) 1000 mm² FOR GRADIENTS OF 1 : 500 AND STEEPER CATCHMENT AREA PER VERTICAL DOWNPIPE (Ac) m² FOR GRADIENTS FLATTER THAN 1 : 500 TOTAL FLOW IN EAVES GUTTER (L / s) 350 400 300 250 200 150 450 500 DESIGN RAINFALL INTENSITY mm / h FIGURE 3.6 REQUIRED SIZE OF EAVES GUTTERS 28 total flow = 1.65 L/s 1.65
24 rainfall intensity = 210 mm/h
total flow = 1.65 L/s As-c (downpipe G) = 28 m² (Ac) 174 m² + 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years min downpipe size = 85 dia 15 9 6 8 4 12 Pitch 23.5° HP DP - A DP - B DP - C DP - D DP - E DP - F DP - G 24 m² 28 m² 25 m² 4 Length of gutter (G) = 4 m Ave flow per metre of gutter 1.65 / 4 = 0.4 L / s
25 Ave flow per metre of gutter Length of gutter (G) = 4 m
1.65 / 4 = 0.4 L / s Ave flow per metre of gutter Length of gutter (G) = 4 m total flow = 1.65 L/s As-c (downpipe G) = 28 m² (Ac) 174 m² + 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years min downpipe size = 85 dia hf 10 mm min 30 mm min flashing TABLE G1 MINIMUM hf VALUES hf = 14 mm
26 hf = 14 mm 1.65 / 4 = 0.4 L / s Ave flow per metre of gutter Length of gutter (G) = 4 m total flow = 1.65 L/s As-c (downpipe G) = 28 m² (Ac) 174 m² + 6 x 4 = 24 15 x 8 = 120 (Ah) 144 m² rainfall intensity = 210 mm/h x 1.2 (F) Gradient 1 : 500 Smoothline Ae = 5900 mm² Acdp = 28 m² 174 / 28 = 7 min number of downpipes ARI = 20 years min downpipe size = 85 dia
32 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
37 T H A N K - Y O U
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