BS ISO 17049:2013 download free.Accessible design Application of braille on signage , equipment and appllances.
BS ISO 17049 specifies the fundiimcntal requirements br braille used on signage, equipment and appliances, Including the dimensional parameters of braille and the characteristics of materials used, and the guidelines fur practical Implementation.
2 Tenns and deflnltions
For the purposes of this document, the following terms and definitions apply.
2.1
signage
meajis of conveying Information abuLit name, direction, location, usage, safety or a form of action
2.2
equipment
permanent device or machine used in daily life in a house, an office or publidy accessible places
EXAMPLE Such devices or machines include kitchen equipment, a copying or printing machine, an automatic teller machine, a ticket kiosk or a lilt.
Note 1 toentry: In 1S09999:2011,6,3,and 183003,theterm ‘elevatorIsused1orll1t,
2.3
appliance
movable device or machine used in daily life, such as an electric appliance for household oroflice use
2.4
tactile reading
recognizing braille and other tactile information by touch
2.5
tactile readabIlity
ease of reading braille and other tactile information by touch
2.6
braIlle cell
space for the braille pattern, comprising up to six predeimned dots set out in two columns of three
2.7
braille pattern
combination of raised dots within a braille cell
2.8
exclusIon zone
area where nothing is pbced around a braille cell or cells
2.9
button
operative device, such as pressure sensitive button, pressure sensitive surface, touch sensitive button, and touch sensitive surface
2.10
dial
control which persons physically rotate In order to operate a function
3 Specifications for braille
3.1 Braille character, word and line
The braille character is composed of single braille patterns or a combination of braille patterns: the braille word is composed of one or more braille characters.
Braille patterns are all placed within the braille cell and they require the space of the braille cell. A braille cell requires the space olall six nominal dots. Vacant dots shall not be neglected because they are a part of the braille pattern.
Where a braille character or word appears in isolation, there shall be an exdusion zone around such a character or word.
Codes and format of braille characters, which are commonly used and recognized in each country, shall be adopted.
Braille shall be arranged to allow tactile reading to be performed consistent with the braille reading order in the language In which it Is presented. e.g,. left to right.
3.2 Configuration and spacing of braille dot and cell
The configuration of braille dots and cells shall be in accordance with Figure 1: the spacing shown as a. b. p and q shall be in the range shown in Jblsj.
Specifications should be in line with national or regional standards. if applicable
— not be damaged in normal use, and
— not be adversely affected by the external thermal environment, moisture or liquid.
Where braille and print are both used, the readability of one format shall not impair the readability of the other.
Braille shall be located on a place that is safe to touch, e.g. away from a source of heat or a sharp edge. Where the information displayed In braille Is revised, braille Information shall be Immediately corrccted accordingly.
4.2 Braille on signage
4.2.1 General
Signage with braille shall be located in appropriate positions for easy access.
The number of cells in a single line shall be as follows:
a) if there is only one column In one line, the number of cells shall not exceed 40;
b) If there are multiple columns in one line, the number of cells in one column shall not exceed 40 and the total number of cells shall not exceed 80 in a single line;
c) an exclusion zone of three or more cells shall be placed between each column In a single line.
4.2.2 Handrail
One application, among others, is on a handrail (see FIgure 5).
Braille shall be displayed parallel to the longitudinal direction of a handrail
Braille shall be displayed on the area where it can be most easily read, and which allows safe reading by touch when a hand holds the handrail. Such an area should be chosen by considering the shape, thickness, surroundings and the method by which the handrail is fixed.
For a handrail on stairs, braille should be displayed at the end of the handrail, which is an extension of tactile walking surface Indicators (TWSI) (see ISO 23599), If any, on the floor In front of the stairs.
Handrails with braille should have extensions, preferably of at least 300 mm in length an both ends of the staircase; this Is to allow for safe reading of braille.