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This article will discuss solar roof mounting requirements, and answer the question of how solar panels fix to your roof.
A solar mounting system, also known as solar racking, is a key component of your solar power system, as it is used to securely attach solar panels to your roof. There are many different solar mounting systems on the market. Mounting solutions include both roof or ground mount systems. However, the majority of solar mounting systems are designed to work with corrugated metal or tile roofs.
Solar power system wind loading requirements in Australia
To be compliant with Australia's National Construction Code solar mounting equipment must be compliant with the requirements of AS/NZS 1170 series of standards on structural actions.
One of the key areas of design consideration for solar mounting systems is wind loading. The standard which describes how structures should be designed for wind loading is AS/NZS1170.2, "Structural design actions – Part 2: Wind actions,"
AS/NZS 1170.2 is a comprehensive standard that covers a range of wind loading factors that need to be considered in the design and installation of solar mounting equipment. These factors include, amongst others, wind speed, and roof configuration. Some of the ways that the standard determines the design of solar mounting are as follows:
- Wind speed: The AS/NZS 1170.2 standard categorises different wind regions around Australia (and New Zealand!). These wind regions have different maximum expected wind speeds. So solar mounting equipment must be able to withstand the maximum expected wind speed based on the location of the installation.
- Terrain category: Wind flow changes over different terrain and the AS/NZS 1170.2 standard includes different wind loading multipliers depending on the local terrain category of the installation in question.
- Roof configuration: The standard also specifies how wind pressures are to be calculated across the roof, considering the building dimensions, roof type, roof height, and roof slope.
To ensure that solar mounting equipment complies with the AS/NZS 1170.2 standard, manufacturers will have their products independently certified. The certification confirms the system will be able to withstand the wind pressures calculated in accordance with the standard. Mounting systems come with detailed installation instructions to ensure they are installed appropriately for the wind region and roof type.
Solar installers need to understand the requirements of the standard and properly follow the manufacturers instructions during installation. This ensures the solar system is properly installed for the wind loads at the site.
The AS1170.2 standard is a comprehensive document that outlines the requirements for the design and installation of solar mounting equipment in Australia. The standard covers a range of factors that can affect the performance of solar mounting equipment, including wind speed, wind direction, roof slope, and roof type. To ensure that solar mounting equipment complies with the standard, manufacturers and installers must follow specific guidelines and procedures, including using high-quality materials and ensuring that the equipment is installed correctly.
If you have questions on whether solar is right for your roof don't hesitate to give us a call or send us a message through the contact form below.