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Eziform™ Half Round Gutter

Eziform™ Half-Round GutterEziform™ Half-Round Gutter from Eziform Sheet Metal has a clean, contemporary profile that complements any architectural style and suits both domestic and commercial applications.

With a wide range of sizes from 100mm diameter to 450mm, and custom cut lengths up to 6 metres, Eziform™ Half-Round Gutter provides flexibility of installation on site and minimum wastage.

The smooth pressed, non-segmented profile eliminates square corners and prevents the build-up of water and dirt. The curved base of the profile creates a faster flow of water, as the water is channelled to the centre of the gutter, maximising drainage performance over most other gutter profiles.

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Selection & SpecificationStandard Eziform™ Half-Round Gutters are manufactured from 0.55mm bmt ZINCALUME® and COLORBOND® material. Heavier gauges of ZINCALUME® as well as stainless steel are also available, in plain profiles without the front bead.

Materials➤ COLORBOND® Steel➤ ZINCALUME® Steel➤ Galvanised Steel➤ Stainless Steel➤ Copper Alloy➤ Aluminium

To avoid premature corrosion, it is important to consider the effects of water drainage from one material on to another.

BracketsHeavy duty type A4 brackets are manufactured in aluminium with a powder coated finish for all size gutters.

AccessoriesA full range of standard and custom rainwater heads and downpipes is available and can be fabricated from a wide range of materials to suit the Eziform™ Half-Round Gutter.

DownpipesDownpipes must have sufficient capacity to allow for gutter drainage. They can be manufactured in all materials in lengths up to 4 metres (150 and 200mm diameter) and 3 metres (90 and 100mm diameter).

Flat-Back ProfileEziform™ Half-Round Gutters are also available with a flat back profile. Please specify at the time of ordering.

Effective Cross-Sectional Area & Downpipe SizeGutter Size (mm) Effective Cross-

Sectional Area* (mm2)

Round Downpipe Diameter (mm)

100 2900 65150 7300 100200 13,700 150225 17,600 150250 22,000 TBD300 32,300 TBD350 44,600 TBD400 58,800 TBD450 75,000 TBD

* Area for Half-Round profile. Contact Eziform for information on flat-back profile. TBD – Downpipe size to be nominated by hydraulic engineer.

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Design ConsiderationsStandards ConformanceThe Eziform™ Half-Round Gutter system has been fully tested. All Eziform™ rainwater products are designed and manufactured to conform with AS2179.

CompatibilityAll building products need to be checked for compatibility with adjacent materials, whether they are part of the current project, pre-existing or planned building elements. Contact Eziform Sheet Metal for more detailed information.

Rainfall IntensityValues of rainfall intensity in the table and map are for 20 year ARI, 5 minute durations and have been derived from AS3500 part 3 ‘Stormwater drainage’. Note that rainfall records in Australia are limited and any data carries a degree of uncertainty. The 20 year ARI values should only be used for external eaves gutters. For internal/box gutters use 100 year ARI values.

20-Year Rainfall Intensities for Qld (mm/hr)Brisbane 251Bundaberg 241Cairns 282Charleville 170Charters Towers 218Cloncurry 172Goondiwindi 182Gympie 228Innisfail 254Longreach 189Mackay 273Mount Isa 169Noosa 253Proserpine 272Rockhampton 248Southport 246Toowoomba 189Townsville 260Warwick 178

Intensity values shown are based on data for one specific reference location and may not be accurate across all the locations given. Specific data for any location can be obtained from the Australian Bureau of Meteorology.

FallA gutter fall of not less than 1:500 is recommended.

TOOWOOMBA

WARWICK

BOONAH

LAIDLEYIPSWICH

BEENLEIGH

BRISBANE

SOUTHPORT

GOLD COAST

COOLANGATTA

CABOOLTURE

KILCOY

CALOUNDRA

MAROOCHYDORE

NAMBOUR

NOOSA

200

190

180

180

190

220

210

230

042

250

240

240

220210

240

230

250

022

200

KINGAROY

230

210

20-Year Rainfall Intensity IsoplethsSouth-East Queensland

The map only indicates the variability of rainfall intensity within the region shown.

Gutter CapacityFor any given roof area, the larger the gutter, the fewer downpipes required, as indicated in the table (opposite). Catchment area calculations must take the roof slope into account. For slopes up to 23 degrees, only a simple plan area of the roof is required.

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Half-Round Gutter

Max area per down- pipe (m2)

Number of downpipes required for typical roof installation150 200 225

Unslotted Roof Plan Area ( m2 ) – for roof slopes up to 23 degreesLocation Rainfall Intensity

(mm/hr) 100 120 140 160 180 200 220 240 260 280 300

140 159 1 1 2 2 2 2 2 2 2 3 3150 149 1 1 2 2 2 2 2 2 3 3 3160 139 1 2 2 2 2 2 2 3 3 3 3170 131 1 2 2 2 2 2 3 3 3 3 3180 124 1 2 2 2 2 2 3 3 3 3 3190 117 2 2 2 2 2 3 3 3 3 3 4

140 116 2 2 2 2 2 3 3 3 3 3 4200 111 2 2 2 2 2 3 3 3 3 4 4

150 109 2 2 2 2 3 3 3 3 3 4 4210 106 2 2 2 2 3 3 3 3 3 4 4

160 102 2 2 2 2 3 3 3 3 4 4 4220 101 2 2 2 2 3 3 3 3 4 4 4230 97 2 2 2 2 3 3 3 3 4 4 4

170 96 2 2 2 3 3 3 3 4 4 4 4240 93 2 2 2 3 3 3 3 4 4 4 4

180 91 2 2 2 3 3 3 3 4 4 4 5250 89 2 2 2 3 3 3 3 4 4 4 5

190 260 86 2 2 2 3 3 3 4 4 4 4 5270 83 2 2 3 3 3 3 4 4 4 5 5

200 81 2 2 3 3 3 3 4 4 4 5 5280 80 2 2 3 3 3 4 4 4 4 5 5

210 78 2 2 3 3 3 4 4 4 5 5 5290 77 2 2 3 3 3 4 4 4 5 5 5

220 300 74 2 2 3 3 3 4 4 4 5 5 5230 71 2 3 3 3 4 4 4 5 5 5 6240 68 2 3 3 3 4 4 4 5 5 5 6250 65 2 3 3 3 4 4 5 5 5 6 6260 63 2 3 3 4 4 4 5 5 6 6 6270 60 3 3 3 4 4 5 5 5 6 6 7280 58 3 3 3 4 4 5 5 5 6 6 7290 56 3 3 4 4 4 5 5 6 6 7 7300 54 3 3 4 4 5 5 5 6 6 7 7

140 53 3 3 4 4 5 5 6 6 6 7 7150 49 3 3 4 4 5 5 6 6 7 7 8160 46 3 4 4 5 5 6 6 7 7 8 8170 44 3 4 4 5 5 6 7 7 8 8 9180 41 3 4 5 5 6 6 7 8 8 9 9190 39 4 4 5 5 6 7 7 8 9 9 10200 37 4 4 5 6 6 7 8 8 9 10 10210 35 4 5 5 6 7 7 8 9 9 10 11220 34 4 5 6 6 7 8 8 9 10 11 11230 32 4 5 6 7 7 8 9 10 10 11 12240 31 4 5 6 7 8 8 9 10 11 11 12250 30 5 5 6 7 8 9 9 10 11 12 13260 29 5 6 6 7 8 9 10 11 12 12 13270 27 5 6 7 8 8 9 10 11 12 13 14280 26 5 6 7 8 9 10 11 11 12 13 14290 26 5 6 7 8 9 10 11 12 13 14 15300 25 5 6 7 8 9 10 11 12 13 14 15

Intensity for Brisbane Note: Minimum gutter gradient 1:500

The selection of the number of downpipes is carried out in accordance with AS3500.3 (Stormwater Drainage). For Half-Round Gutters larger than 225mm in diameter, hydraulic design must be carried out by a suitably qualified person to determine the number and size of downpipes required.

Eziform™ Half-Round Gutters – Downpipe Design Guide

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Ordering & HandlingOrderingEziform™ Half-Round Gutter can be ordered directly from Eziform Sheet Metal or Stramit Building Products, through distributors, or supplied and fixed by a roofing contractor.

Handling/StorageEziform™ Half-Round Gutter and accessories should be handled with care at all times to preserve the product’s performance and the quality of the finish. Packs should always be kept dry and stored above ground level while on site. If the materials become wet, they should be separated, wiped and placed in the open to promote drying.

CuttingIf cutting is required, use a power saw with a steel cutting blade or a power nibbler and, for localised cutting, tin snips. Avoid the use of abrasive discs, which can create burred edges and coating damage. Please dispose of off-cuts carefully.

Eziform™ Half-Round Gutter Bracket Spacing & Fixing

Gutter Diameter (mm) Radius (mm) Dim A (mm) Max. Bracket Spacing (mm)

Min. Bracket Fixing

100 50 11 1200 2 x 12-gauge screws150 75 36 1200 2 x 12-gauge screws200 100 61 1200 2 x 12-gauge screws225 112 73 1200 2 x 12-gauge screws250 125 86 1200 2 x 12-gauge screws300 150 111 1200 2 x 12-gauge screws350 175 138 900 3 x 12-gauge screws400 200 163 900 3 x 12-gauge screws450 225 188 900 3 x 12-gauge screws

Note: The above table is valid for fixing to timber fascia, or steel members at least 1.5mm thick. All gutters to be fixed to each bracket at the front and back using aluminium rivets 3.2mm x 6mm long.

Radius

Eziform™ Aluminium Half Round Gutter Bracket Details

18mm

80mm

40mm

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3mm up to 300 Diameter5mm up to 450 Diameter

183

20 Typ

8

20 Typ

8

30mm

30mm

Dim A

30mm

30mm

Dim A

Hole Detail (up to 300 dia)

Hole Detail (300 to 450 dia)

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The information contained in this brochure is as far as possible accurate at the date of publication. However, before application in a particular situation, Eziform Sheet Metal recommends that qualified expert advice be obtained confirming the suitability of the product(s) and information in question for the application proposed. While accepting its legal obligations, Eziform Sheet Metal disclaims all liability (including liability for negligence) for all loss and damage resulting from the use of the information provided in this brochure.

Other Products Other custom gutter profiles such as Ogee and Quad can also be produced.

Downpipes can be manufactured in all materials in lengths up to 4m (150 and 200mm diameter) and 3m (90 and 100mm diameter).

An extensive range of rainwater heads can be manufactured to order to complement any design.

Eziform Sheet Metal can manufacture a wide range of ancillary products, including astragals, vents and louvres.

Eziform Sheet Metal offers a wide range of purpose fabricated roofing accessories in stainless steel, coated steel, aluminium and copper, including:

➤ Custom Fabricated Gutters➤ Stainless Steel Box Gutters➤ Fascia Gutter and Brackets➤ Downpipes➤ Rainwater Heads➤ Commercial Flashing➤ Roof Ventilators

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Eziform Sheet Metal57-71 Platinum Street, Crestmead Qld 4132Phone: 07 3498 6600 Fax: 07 3498 6666sales@eziform.com.au

® ™ Trade marks of Stramit Corporation Pty Limited ABN 57 005 010 195Trading as Eziform Sheet Metal. A member of the Fletcher Building Group.© Stramit Corporation Pty Limited, April 2018