Glass Balustrade Compliance and Heights in SA
As general guidance in South Australia, a balustrade is required wherever there is a fall of about 1 metre or more, such as a balcony, deck, landing, or stair edge. Barrier height is typically at least 1000mm on balconies and landings, with stair barriers generally allowed a little lower along the flight. Openings are limited so a small child cannot pass through, usually to a 125mm gap or less. Laminated (safety) glass is commonly required where a panel forms part of the barrier and there is a fall risk. This is general information, not legal advice; confirm current SA building requirements before you build or certify.
Key takeaways
- A balustrade is generally required where there is a fall of about 1 metre or more.
- Balcony and landing barriers are typically at least 1000mm high.
- Openings are usually limited to a 125mm gap or less to stop a child passing through.
- Laminated safety glass is commonly required where the glass forms the barrier over a fall.
- This is general guidance only; confirm the current SA building rules before building.
When a balustrade is required and how high
As a general rule, once a floor, deck, balcony, or landing sits about 1 metre or more above the surface below, a barrier is required to stop a fall. Below that threshold a barrier is often not mandatory, though many homeowners add one anyway for a finished look.
On balconies, landings, and the like, the barrier is typically at least 1000mm high measured from the finished floor. Along a stair flight the required height is generally allowed to be a little lower, measured from the stair nosing, which is why stair and landing heights can differ on the same project.
These figures are the common standards, but the exact numbers are set by the current South Australian building rules and can vary with the situation. Treat them as general guidance and confirm the requirements for your specific project before you order glass.
Gaps and openings
Barriers must not have openings large enough for a small child to pass through. As a general standard, gaps are limited to 125mm or less, which governs the space beneath a glass panel, between panels, and at the junction with posts or the floor.
For frameless and semi-frameless glass this is rarely a problem across the panel itself, since the glass is solid. The watch points are the base gap under the glass and any gap at the ends of a run, which a careful installer sets out to stay within the limit.
Where a barrier is in a location that a child could climb, extra care is taken so horizontal elements or nearby features do not create a foothold. Confirm the exact opening limits and climbability rules for your setting against the current SA requirements.
When laminated glass is required
Glass used in a balustrade over a fall risk is a safety-critical element, and laminated glass is commonly required in these situations. Laminated glass holds together if it breaks, because an interlayer bonds the panel, which keeps a barrier in place rather than shattering away.
Toughened glass alone is very strong but can break into fragments, so where the glass forms the barrier and there is a drop, a laminated or toughened-laminated specification is typically called for. The exact requirement depends on whether there is a handrail and how the panel is supported.
This is exactly the kind of detail where general guidance is not enough to certify a build. A vetted installer specifies the correct glass for the drop and support type, and you should confirm the current South Australian requirements with your certifier before the glass is ordered.
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Frequently asked questions
As a general standard, balcony and landing barriers are at least 1000mm high, while stair barriers are generally allowed a little lower along the flight. This is general guidance only, so confirm the current SA building rules for your project.
Laminated safety glass is commonly required where the glass forms the barrier and there is a fall risk, because it holds together if it breaks. The exact requirement depends on the support and handrail, so confirm current SA rules before ordering.
A barrier is generally required once the edge sits about 1 metre or more above the surface below, such as a balcony, deck, or landing. This is general guidance, not legal advice, so verify the current SA requirements before you build.