What Is LRV Testing?
Luminance Reflectance Value (LRV) is a measurement of the amount of light reflected from a surface. To comply with Australian Standards, TGSI installations must achieve a minimum Luminance Reflectance Contrast between the TGSI and the surrounding substrate. LRV Testing measures the Luminance Reflectance Value of both the TGSI and the surrounding substrate and compares the two values using the formula specified in AS/NZS 1428.4.1:2009 to determine whether there is sufficient Luminance Contrast. Tests need to be conducted in both dry and wet conditions to achieve compliance.
Tactile Ground
Surface Indicators
Must Achieve The
Following Contrasts:
Integrated Tiles
(ESP Access® Tile)
Discreet
TGSI
Composite
Discreet TGSI's
Why Is LRV Important?
Having sufficient luminance contrast between TGSIs and the surrounding substrate allows those with a vision impairment, and all pedestrian users, to better detect tactile guidance. AS/NZ 1428.4.1:2009 specifies minimum Luminance Contrast Values according to the type of TGSI used. Integrated TGSI’s, such as ESP’s Access Tile require a minimum of 30% Luminance Contrast to achieve compliance. Discreet (individual) TGSI’s are required to meet a higher minimum contrast of 45%, and composite TGSI’s (individual TGSI’s usually with a different coloured insert at the dome) are required to meet a minimum of 60% Luminance Contrast.
ESP’s Service Offering
ESP Australia is committed to assisting customers to select the correct product for each application. ESP can provide Luminance Contrast Testing on our TGSI or Stair Nosing installations to determine compliance with AS/NZS1428.4.1:2009. Tests are conducted with all results independently reviewed and verified prior to issuing certification.
If LRV Testing is required, please contact us to discuss your needs and arrange a quotation.
