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Why Why TGSIs Must Be Installed Correctly?
Tactile ground surface indicators aren't decorative. They're a navigation system for people who can't see. Get them wrong and you create confusion or danger for the people they're meant to help.
Warning tactiles (the dots) alert people to hazards like stairs, ramps, and road crossings. Directional tactiles (the bars) guide people along paths. The spacing, positioning, and colour contrast all matter.
We installed TGSIs at a shopping centre in Preston where the previous contractor had placed warning tactiles too far from the stairs. A vision-impaired visitor stepped past the warning zone and fell on the stairs. The centre faced legal action.
We removed the incorrectly placed tactiles and reinstalled at the correct 300mm setback specified in AS/NZS 1428.4.1. The standard exists for good reason.
Key Benefits
Warning tactiles (hazard) installed at correct 300mm setback from hazards as per AS/NZS 1428.4.1
Directional tactiles (guidance) aligned correctly with 600mm minimum width for path guidance
Luminance contrast of minimum 30% against surrounding surface for visibility
Correct colour selection: typically yellow for hazard warning, contrasting colour for directional
Surface-applied or integrated options depending on substrate and installation requirements
Adhesive, mechanical, or resin-set installation methods matched to your surface and traffic
Site Inspection
Free assessment and detailed quote
Professional Marking
Expert application with premium materials
Quality Assurance
Final inspection and compliance sign-off
Compliance Standards
AS/NZS 1428.4.1:2009
Primary standard specifying TGSI types, dimensions, placement, and luminance contrast requirements.
AS/NZS 1428.1
General requirements for access and mobility including where TGSIs are required in accessible routes.
AS 4586
Slip resistance requirements for tactile indicators in wet and dry conditions.
Building Code of Australia
References AS/NZS 1428 standards for access requirements in building design and construction.
Disability Discrimination Act 1992
Legal requirement for accessible facilities including correct TGSI installation.
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All our work meets or exceeds Australian Standards and state road authority requirements
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AS 1742
Traffic Control Devices
Specifies line colours, widths, arrow designs, and placement for road markings. Ensures all traffic control devices meet national safety standards.
AS/NZS 2890
Parking Facilities
Covers bay dimensions (2.4m × 5.4m standard, 3.2m × 5.4m accessible), aisle widths, and traffic flow requirements for compliant parking areas.
AS 4586
Slip Resistance
Defines slip resistance classifications (P rating) for pedestrian surfaces. Critical for wet areas, ramps, and high-traffic zones.
AS/NZS 1428
Access & Mobility
Sets requirements for accessible parking bays, tactile indicators, and mobility access. Essential for DDA compliance and accessibility audits.
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Frequently Asked Questions
Warning tactiles have raised dots (truncated cones) and alert to hazards. Directional tactiles have raised bars and guide along paths. Different patterns serve different purposes.
AS/NZS 1428.4.1 specifies 300mm setback from the hazard (top of stairs, edge of platform, etc.). This gives adequate warning distance.
They must provide minimum 30% luminance contrast with the surrounding surface. Yellow is common for hazard warning. The key is sufficient contrast for visibility.
Yes, surface-applied TGSIs can be adhesive-bonded or mechanically fixed to existing concrete, tiles, or pavers. We assess your surface and recommend the best method.
Quality polyurethane or stainless steel TGSIs typically last 10+ years in normal conditions. High-traffic areas may need earlier replacement.
AS/NZS 1428.4.1 specifies where TGSIs are required in accessible routes. Not every stair requires them, but those on accessible paths do. We assess your specific requirements.
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