How to specify:
When specifying Stone Directions’ pavers it is important to accurately refer to all of the following features:
- Tactile Type – Cautional or Directional.
- Size – 300X300X40 or 300X300X60.
- Colour (Voodoo, Gunmetal, Pearly Grey, Ivory, Sun Gold, Brick Red)
eg. Tactile Cautional, 300X300X40, Sun Gold colour.
If you are required to allow for different brands of pavers, it is important to specify the following basic standards to ensure that other pavers being considered are of a comparable standard to Stone Directions.
- Pavers must have a concrete compressive strength in excess of 50MPa.
- Pavers must be manufactured using wet cast technology.
- Pavers must have a thickness consistency of no more than +/- 2.5 mm.
- Pavers must have a plan size consistency of no more than +/- 3.0 mm.
- Pavers must be given an effective pre-delivery anti-efflorescence treatment.
- The colour must be equivalent to the specified Stone Directions colour.
Are TGSIs mandatory?
YES, In Australia the following legislated codes and standards are very specific to the design, installation and placement of TGSIs. These standards are enforced to allow for the clear reading of TGSIs in all public spaces and to ensure that the experience of the vision impaired remains consistent in the urban landscape.
1. AUSTRALIAN AND NEW ZEALAND STANDARDS AS/NZS 1428.4.2002 This standard states how to do it. (TGSI Design/Layout/Application)
2. THE BUILDING CODE OF AUSTRALIA (BCA) SECTION D CLAUSE 3.8 This document states what must be done as a legal minimum. (State/National Building Certification requirements of new work)
3. THE DISABILITY DISCRIMINATION ACT (DDA) This Federal Act states why and within what context. (Legal rights of individuals preclude and can override standards or state legislation, even those of a regulatory body)
LUMINANCE CONTRAST: Integrated pavers require a minimum of 30% luminance contrast between the paver and base surface.
LIGHT REFLECTIVE VALUES ( LVR ) contribute to the effectiveness of tactile indicators for vision 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. When architects and specifiers select a colour, it’s important to factor in the colour of the substrate. Failure to consider the background colour could result in insufficient contrast.