Specification D3.6------ Brail le and Tactile signs continued… (g) Minimum letter spacing of tactile characters 5 Lighting on signs shall be 2mm. Braille and Tactile Signs shall be illuminated to (h) Minimum word space of tactile characters on ensure luminance-contrast requirements are met signs shall be 10mm. at all time during which the sign is required to be (i) Thickness of letter stroke must be no less read. than 2mm and no more than 7mm. 6 Braille (j) Tactile text must be left justified, except that The following applies to Braille: single words may be centre justified (k) Tactile text must be Arial typeface. (a) Braille must be grade 1 braille (uncontracted) in accordance with the criteria set out by the 4 Luminance-contrast Australian Braille Authority. The following applies to luminance-contrast: (b) Braille must be raised and domed. (a) The background, negative space or fill of (c) Braille must be located 8mm below a sign or border shall have a luminance- the bottom line of text (not including contrast with the surface on which it is descenders). mounted of not less than 30%. (d) Braille must be left justified. (b) Tactile characters, icons and symbols (e) Where an arrow is used in the tactile sign, shall have a minimum luminance-contrast a solid arrow shall be provided for Braille of 30% to the surface on which the readers. characters are mounted. (f) On signs with multiple lines of text and (c) Luminance-contrasts must be met under characters, a semi-circular Braille locator at the lighting conditions in which the sign is the left margin must be horizontally aligned to be located. with the first line of Braille text. braille signs 150 www.uniformsafetysigns.com