Gutters for Commercial Buildings

20 July 2021

Different Types of Gutters for Commercial and Industrial Structures


IN BRIEF

  • The Plumbing Code outlines specific requirements for guttering on commercial, residential, and industrial structures. These regulations govern the type of guttering design available for your structure.

  • Steelcorp offers Stramit gutters in various styles, including fascia, half-round, and custom box gutters – all available in COLORBOND® colours.

  • Our design team can help ensure that gutters are appropriately selected and sized for your roof, ensuring compliance with the Code and minimising any water ingress.


Design Recommendations and Gutter Regulations for Commercial Buildings

When you’re designing a new steel building you’ll need to make sure your design is compliant with the National Construction Code (previously known as the Building Code of Australia). The Code is in place to make sure any commercial, residential or industrial structures are built safely and will last for many years to come. It covers hundreds of different aspects of building including how guttering should be selected and installed.

The National Construction Code has specific requirements for the disposal of surface water that is collected by your roof. The simplest way to ensure your structure complies with the Code is by using the right roof drainage or guttering that meets Australian Standards and is compliant with any special regulations in your State.

As a quick overview, there are a series of different rules and recommendations that apply to guttering on large commercial structures, including the National Construction Code and the Australian Standard that is commonly known in the industry as the Plumbing Code.

Guttering Regulations

National Plumbing and Drainage Code AS/NZS 3500.3

This provides calculations that allow building designers to work out the surface catchment area of the roof, consider the potential rainfall it will have to handle, and in turn recommend an appropriately sized gutter system. It takes into account slope, gradients and the shape of the roof, as well as the typical annual rainfall for your area.


NCC Volume One, Performance Requirements FP1.2 and FP 1.3

In simple terms, this section of the Code refers to commercial buildings. It covers aspects like preventing rainwater from entering a building by waterproofing it to withstand a 100-year flood, directing surface water from storms to a channel or downpipe, and preventing water from damaging the building.


NCC Volume Two, Part 3.5.2, Performance Requirement P2.2.1 and Clauses 3.5.2.1. to 3.5.2.5

This section of the Code is mainly for residential buildings (which some smaller sheds can be classified as). It provides similar guidance to the above, namely that your structure needs to withstand serious rainfall events.

How to Navigate Guttering Design Requirements

Interpreting the Code can be complex and confusing, which is why we’re here to help. Our team are experienced in creating commercial buildings, industrial structures and rural designs that are compliant with the above Codes and your local council legislation, so we can provide guidance and recommendations on the best gutter for your building.


More information on NSW Approvals or Victorian approvals can be found in our knowledge hub.


Recommended Gutters for Steel Buildings

We use Stramit gutters in a few different styles, which fit various types of roofing profiles. Fascia and half-round guttering systems are available in a wide range of COLORBOND® colours to perfectly complement your design.


Fascia Gutter

Made of high-tensile steel, fascia gutters provide continuous support and suit a range of design styles from traditional to contemporary buildings. Coated with Zinc, Aluminium and Magnesium alloy and finished in COLORBOND® steel, fascia gutters are extremely durable.


Half Round Guttering

With a rounded profile, the half-round gutters have a high water-carrying capacity and a curved profile that promotes self-cleaning. Like fascia gutters, they are coated for corrosion resistance and available in COLORBOND® colours.


Custom Box Gutter

Simple box gutters are tough and hard-wearing, with neat clean lines that complement all types of building designs. Customising box gutters for your individual project is a cost-effective solution that means we can get the perfect length and profile for your building. Plus, because they are custom sized, this minimises the number of downpipes required. Custom gutters are tailored to your structure’s size, location and rainfall intensity.

Which Gutter is Right for Your Building?

The team at Steelcorp is here to help you find the best guttering that will provide reliable, long-term rainwater management. Our experienced building designers ensure that gutters are appropriately selected and sized for your roof, resulting in minimal risk of overflow and no water leakage behind the fascia and into the interior of the structure.


Give our team a call to learn more about our process and how to get a structure that is resistant to the elements for decades to come.

Share by: