Eziform™ Half Round Gutter
1
Eziform™ Half-Round Gutter
Eziform™ 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.
Selection & Specification
Standard 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.
Brackets
Heavy duty type A4 brackets are manufactured in aluminium
with a powder coated finish for all size gutters.
Accessories
A 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.
Downpipes
Downpipes 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 Profile
Eziform™ Half-Round Gutters are also available with a flat back
profile. Please specify at the time of ordering.
Effective Cross-Sectional Area & Downpipe Size
Gutter Size (mm)
Effective CrossSectional Area*
(mm2)
100
2900
65
150
7300
100
200
13,700
150
225
17,600
150
250
22,000
TBD
300
32,300
TBD
350
44,600
TBD
400
58,800
TBD
450
75,000
TBD
Round Downpipe
Diameter (mm)
* Area for Half-Round profile. Contact Eziform for information on flat-back profile.
TBD – Downpipe size to be nominated by hydraulic engineer.
3
Design Considerations
20-Year Rainfall Intensity Isopleths
South-East Queensland
Standards Conformance
The Eziform™ Half-Round Gutter system has been fully tested.
All Eziform® rainwater products are designed and manufactured
to conform with AS2179.
NOOSA
CALOUNDRA
All 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.
KILCOY
20
Longreach
189
Mackay
273
Mount Isa
169
Noosa
253
Proserpine
272
Rockhampton
248
Southport
246
Toowoomba
189
Townsville
260
Warwick
178
240
254
250
Innisfail
230
228
GOLD
COAST
0
182
Gympie
22
Goondiwindi
240
WARWICK
210
172
230
BOONAH
190
Cloncurry
SOUTHPORT
0
200
218
BEENLEIGH
18
0
170
Charters Towers
24
IPSWICH
LAIDLEY
18
Charleville
220
0
0
251
241
BRISBANE
TOOWOOMBA
20-Year Rainfall Intensities for Qld (mm/hr)
282
210
19
Values of rainfall intensity in the table and maps are for 20 year
ARI, 5 minute durations and have been derived from AS3500 part
3.2 ‘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.
Cairns
CABOOLTURE
0
Rainfall Intensity
Bundaberg
250
MAROOCHYDORE
Compatibility
Brisbane
240
230
220
210
NAMBOUR
KINGAROY
COOLANGATTA
The map only indicates the variability of rainfall intensity within
the region shown.
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.
Fall
Gutter Capacity
A gutter fall of not less than 1:500 is recommended.
For 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.
4
Eziform™ Half-Round Gutters – Downpipe Design Guide
Half-Round Gutter
150
200
225
Unslotted
Location Rainfall Intensity
(mm/hr)
140
150
160
170
180
190
200
210
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
220
230
240
250
260
270
280
290
300
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
Max area
per downpipe (m2)
159
149
139
131
124
117
116
111
109
106
102
101
97
96
93
91
89
86
83
81
80
78
77
74
71
68
65
63
60
58
56
54
53
49
46
44
41
39
37
35
34
32
31
30
29
27
26
26
25
Number of downpipes required for typical roof installation
Roof Plan Area ( m2 ) – up to 23 degrees
100
120
140
160
180
200
220
240
260
280
300
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
5
5
5
5
6
6
6
6
6
7
7
7
7
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
5
5
5
5
6
6
6
7
7
7
7
8
8
8
8
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
5
5
5
5
5
6
6
6
7
7
7
8
8
8
8
9
9
9
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
7
7
7
8
8
8
9
9
9
10
10
10
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
7
7
7
8
8
8
9
9
9
10
10
11
11
11
2
2
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
6
7
7
8
8
8
9
9
10
10
10
11
11
11
12
12
2
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
6
6
6
7
7
8
8
9
9
9
10
10
11
11
12
12
12
13
13
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
6
6
6
6
7
7
7
7
8
8
9
9
10
10
11
11
11
12
12
13
13
14
14
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
6
6
6
6
7
7
7
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
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.
5
Ordering & Handling
Ordering
Eziform™ 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/Storage
Eziform™ 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.
Cutting
If 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
150
50
11
1200
2 x 12-gauge screws
75
36
1200
2 x 12-gauge screws
200
225
100
61
1200
2 x 12-gauge screws
112
73
1200
2 x 12-gauge screws
250
125
86
1200
2 x 12-gauge screws
300
150
111
1200
2 x 12-gauge screws
350
175
138
900
3 x 12-gauge screws
400
200
163
900
3 x 12-gauge screws
450
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.
18
3
40mm
80mm
3
3mm up to 300 Diameter
5mm up to 450 Diameter
us
8
20 Typ
di
Ra
8
30mm
30mm
20 Typ
Dim A
Dim A
18mm
Eziform™ Aluminium Half Round
Gutter Bracket Details
30mm
30mm
Hole Detail
(up to 300 dia)
Hole Detail
(300 to 450 dia)
6
Eziform Sheet Metal offers a wide range of purpose
fabricated roofing accessories in stainless steel, coated steel,
aluminium and copper, including:
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.
➤
Custom Fabricated Gutters
Stainless Steel Box Gutters
Fascia Gutter and Brackets
Downpipes
Rainwater Heads
Commercial Flashing
Roof Ventilators
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.
7
Eziform Sheet Metal
41 Parramatta Road, Underwood, Qld 4119
Phone: 07 3208 0660 Fax: 07 3808 2928
[email protected]
® ™ Trade marks of Stramit Corporation Pty Limited ABN 57 005 010 195
Trading as Eziform Sheet Metal. A member of the Fletcher Building Group.
COLORBOND® and ZINCALUME® are registered trade marks of BlueScope Steel Limited.
© Stramit Corporation Pty Limited, July 2011
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