Square Downpipes
Square downpipes have a modern, sleek appearance that sits flush against a wall. You may be eligible for a discount. Request pricing for competitive rates.
Downpipes > Square Downpipes
Square Downpipes
Square downpipes are available in a range of different sizes to suit any project. The most common size used for domestic application is 100mm x 75mm. Other custom sizes may also be available on request. Available in a range of UniCote® colours, UniZinc®, galvanised, stainless steel and copper and are available in lengths up to 5m.
Technical Information
The below formula will provide you with a general indication in non cyclonic areas how much downpipe is required. This is assuming that the maximum rainfall does not exceed 125mm/hour.
Every 1m2 of roof = 70mm2 of downpipe is required.
We recommend draining to different points using smaller downpipes rather than only one large outlet. Downpipes should be spaced at no more than 12000mm centres where possible.
For a more accurate information, please read the Australian Standards – Installation Code for Metal Roofing and Wall Cladding SAA HB39-1997.
| application | Rainwater collection Often used in domestic applications |
| Material thickness | 0.55mm BMT |
| Steel Grade | G300 steel |
| Substructure | Attach under gutter and to wall |
| Typical fixing method | Downpipe drops to gutter and straps to wall |
| Fasteners | As required |
| Nominal Width | 100mm |
| Minimum roof slope | 2° for 25mm rib, 1° for 38mm rib |
| Rib height | 25mm or 38mm |
| Standard effective cover | 25mm = 2952 / 495 standard* 38mm = 265 / 465 standard* *customisable pan widths available |
| Installer | The downpipe shall be installed by an accredited installer, in accordance with manufacturers specifications. |
| Material and finishes available | Protected steel to AS 1397, Aluminium/Zinc/Magnesium coated steel with or without protective and decorative paint film to AS 2728. |
Resources
Technical Manual
COLOURS/FINISHES
C Available in UniCote® Coastal Steel.
M Available in UniCote® Matt Steel.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
UniCote® is a registered trademark of Selection Steel Pty Ltd.
U Available in COLORBOND® Ultra steel.
M Available in COLORBOND® Matt steel.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
COLORBOND® steel and® colour names are registered trade marks of BlueScope Steel Limited. ™ colour names are trade marks of BlueScope Steel Limited.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
® colour names are registered trade marks of BlueScope Steel Limited.
*The swatches above have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing as varying light conditions, different devices/screens and printing limitations may affect colour tones.
ZINCALUME® is a registered trademark of BlueScope Steel Limited.
UniZinc™ is a registered trademark of Selection Steel Pty Ltd.
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