AS 1428.4 PDF

Latest version of document. Specifies provision of a built environment that is legible to all, particularly those who are blind or are partially sighted, through tactile signs. Supersedes Draft AS Sample Specification Download sample specifications and see what's possible with NBS Chorus Case studies Find out how our customers use our software and services Authors Meet some of our specialists and contributors Training Interactive training courses and educational material, to help you get the most from NBS software tools Downloads and updates Download the latest versions of our software and find out about the latest updates to content About NBS Our Vision, Mission and Values Newsroom All the latest NBS and industry news and stories.

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Vision impaired pedestrians rely on consistency for accurate interpretation of the cues provided by tactiles. To maintain consistency, a number of factors need to be considered:. Tactiles need to be manufactured to precise specifications to achieve adequate prominence without causing a tripping hazard. Tactiles must be installed with the correct spacing between each unit. Luminance contrast contributes to the efficacy of tactile indicators for visions impaired pedestrians.

The reason for this is that a large percentage of vision impaired people still retain partial vision and can detect the contrast provided by suitably coloured tactiles. Failure to consider the background colour could result in insufficient contrast.

Refer to the luminance chart for selection details. An essential consideration when selecting tactile indicators is the level of slip resistance provided. Tactiles are often placed at hazardous locations such as bus and rail platforms, escalators, top of stairs and pedestrian crossings. Due to the nature of their application, tactile indicators need to withstand harsh conditions including constant foot traffic, heavy rolling loads, extreme UV levels and other natural elements such as wind and rain.

Choosing hard wearing, UV Stabilised Tactiles is essential to maintain appearance and functionality. Poor quality products suffer degradation over time. Worn surfaces and faded colours eventually render tactiles non-compliant. Furthermore, the information provided is solely for the purposes of TGSIs and is not related to the design, configuration or formation to stairs, handrails, ramps and accessible paths depicted therein.

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There are two main publications covering the application of Tactile Indicators in Australia:. We cannot, however, be responsible for your interpretation of our material. This can save a great deal of time and grief at the end of your project tactile indicators are a finishing trade and can, in the worst case, delay the issuing of critical certifications allowing the facility to be used. TacPro Note: Luminance meters are available to check contrast levels but common sense often prevails with a simple rule of thumb — light colours on dark ground surfaces, and vice versa. Issues only arise when building owners and architects consider aesthetics over public safety and attempt to blend the tactiels into the surrounding ground surface. Whilst not mandatory, Safety Yellow has been proven to provide the most effective contrast on almost any surface. The exception to the mm set-back requirement is at train stations and passenger ferry terminals.

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