Cautional-Tactile-Voodoo-Chelmstone-Noosa-Dayshot.jpg

CAUTIONAL TACTILE PAVING

Tactile Ground Surface Indicators (TGSIs)
Assisting those with visual impairements of approaching hazards

Cautional or Warning tactiles (TGSIs) indicate to those with a visual impairements of an approaching hazard. Cautional TGSIs provide a ‘message’ to pause and consider a change in direction. Some common areas which require the installation of cautional tactiles include:

  • Stairways

  • Escalators

  • Edge of carriageways

  • Ramps

  • Railways Platforms

  • Bust and Tram stops

  • Driveways

  • Overhead hazards
     

Cautional Voodoo Tactiles, Noosa Junction
Cautional Voodoo Tactiles, Noosa Junction

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Cautional Voodoo Tactiles, Noosa Junction
Cautional Voodoo Tactiles, Noosa Junction

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Cautional Voodoo Tactiles, Noosa Junction
Cautional Voodoo Tactiles, Noosa Junction

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Cautional Voodoo Tactiles, Noosa Junction
Cautional Voodoo Tactiles, Noosa Junction

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Chelmstone's has been supplying its cautional tactiles to major project and city councils around Australia for well over a decade. 

CAUTIONAL TACTILE COLOUR RANGE

A tactile's colour choice is vitally important to ensure it's in compliance with AS/NZS 1428.4.1:2009 luminance contrast requirements. Luminance contrast of TGSIs is the difference in the amount of light reflected from
the TGSIs compared to the amount of light reflected from the background or adjacent path of travel, commonly referred to as luminance reflective value (LRV). Where the TGSI is an integrated unit, it requires a minimum luminance contrast of 30% compared to the amount of light reflected from the surface of the adjacent path of travel. Each colour has its own specific wet and dry luminance value. To caculate whether two areas have a sufficient 30% contrast enter in the values into the below luminance calculator.  

Voodoo
 

Chelmstone-Tactile-Cautional-Voodoo-334-TGSI.PNG

Wet LRV - 4.0
Dry LRV - 8.0

Ivory

Chelmstone-Tactile-Cautional-ivory-334-TGSI.jpg

Wet LRV - 40.3
Dry LRV - 62.0

Pewter

Chelmstone-Tactile-Cautional-PEWTER-334-TGSI.jpg

Wet LRV - 33.4
Dry LRV - 46.8

Yellow

Chelmstone-Tactile-Cautional-YELLOW-334-TGSI.jpg

Wet LRV - 42.0
Dry LRV - 46.0

Corn

Chelmstone-Tactile-Cautional-CORN-334-TGSI.jpg

Wet LRV - 24.5
Dry LRV - 33.0

Snow

Chelmstone-Tactile-Cautional-SNOW-334-TGSI.jpg

Wet LRV - 50.1
Dry LRV - 77.1

Red

Chelmstone-Tactile-Cautional-RED-334-TGSI.jpg

Wet LRV - 7.7
Dry LRV - 12.0

LUMINANCE CALCULATOR

Enter your lowest wet or dry luminance reflective value (LRV) first into the luminance calculator, followed by your corresponding higher wet or dry luminance reflective value (LRV) next. 

If the luminance contrast achieved is great than 30%, the colours are suitably integrated and contrast minimums have been achieved. 

This Calculator uses the open-source Bowman-Sapolinski Equation as stipulated in AS/NZS 1428.4.1:2009

CAUTIONAL TACTILE SIZES 

All Chelmstone's cautional tactile ground surface indicators  (TGSIs) comply with Australian standards as detailed in figure 1.1. 

 

Chelmstone supplies cautional or hazard tactiles in several sizes including the following:
 

  • 300 x 300 x 40mm

  • 300 x 300 x 50mm

  • 300 x 300 x 60mm

  • 400 x 400 x 40mm

  • 400 x 400 x 80mm

  • 600 x 600 x 60mm

Tacitle-Dimensions-Cautional.PNG

Figiure 1.1

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