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Braille and Tactile Signs

Extracts from the National Construction Code
D3.6 Identification of accessible facilities, services
and features

Specification

2. Braille and Tactile signage

2.1 Location of Braille and Tactile Signs

Signs including symbols, numbering and lettering must be designed and installed as follows:
(a) Signs must be located not less than 1200mm and not higher than 1600mm above the floor or ground surface.
(b) Signs with single lines of characters must have th line of tactile characters not less than 1250mm and not higher than 1350mm above the floor or ground surface.
(c) Signs identifying rooms containing features or facilities listed in D3.6 must be located-

    (i) on the wall on the latch side of the door with the leading edge of the sign located between 50 mm and 300 mm from the architrave; and
    (ii) in the event of insufficient latch side dimension, a sign may be placed on the non-latch side of the door; and
    (iii) where (i) or (ii) is not possible, the sign may be placed on the door itself.

(d) Signs identifying paths of travel must be placed so they are located directly ahead in the direction of travel. Where one wall continues in the direction of travel and the other forms a corner, the sign must be placed on the continuing wall.

2.2 Braille and Tactile Sign Specification

The following applies to Braille and Tactile sign orientation:
(a) Tactile characters must be raised or embossed to a height of not less that 1 mm and not more than 1.5 mm.
(b) Characters must have a height of not less that 17.5 mm for each meter of viewing distance.
(c) Upper case tactile characters must have a height of not less than 15 mm and not more than 55 mm.
(d) Lower case tactile characters must have a height of 50% of the related upper case characters
(e) Tactile characters, symbols, and like, must have rounded edges.
(f) The entire sign, including any frame, must have all edges rounded.
(g) The surface of the sign must be continuous for hygiene purposes.
(h) Signs must be constructed so as to resist the removal of letter and Braille dots picking or adhesive failure.
(i) The background, negative space or fill of signs must be of matt or low sheen finish.
(j) The characters, symbols, logos and other features of signs must be matt or low sheen finish.
(k) The minimum letter spacing of tactile characters on signs must be 2 mm.
(l) The minimum word spacing of tactile characters on signs must be 10 mm.
(m) Fonts with letters of constant stroke thickness must be used.
(n) The thickness of letter strokes must not be less than 2mm and not more than 7 mm.
(o) Tactile text must be left justified, except that single words may be centre justified.

2.3 Luminance-Contrast

The following applies to luminance-contrast as defined in AS1428.1:
(a) The background, negative space or fill of a sign or border must have a minimum luminance-contrast with the surface which it is mounted of 30%
(b) A border must be provided for luminance-contrast with the sign's background
and shall have a minimum width of 5 mm.
(c) Tactile characters, icons and symbols must have a minimum 30% luminance-contrast with their background or fill within the sign.
(d) Luminance-contrast must be met under the lighting conditions in which the sign is to be located.

2.4 Lighting

Braille and Tactile signs must be illuminated to ensure luminance-contrast requirements are met at all times during which the sign is required to be read.

2.5 Braille

The following applies to Braille:
(a) Braille must be grade 1Braille (uncontracted) in accordance with the criteria set out by the Australian Braille Authority.
(b) Braille must be raised and domed.
(c) Braille must be located 8 mm below the bottom line of text (not including descenders).
(d) Braille must be left justified.
(e) Where an arrow is used in the tactile sign, a small arrow must be provided for Braille readers.
(f) On signs with multiple lined of text and characters, a semi-circular Braille locator at the left margin must be horizontally aligned with the first line of Braille text.

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BCA 2008 | Approved for use by the Australian Building Codes Board | www.abcb.gov.au

 

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