/ ADA Rules and Regulations Summary / Tactile Characters /


1/32 inch (0.8 mm) minimum above the background.

Tactile Character Depth

ADVISORY (703.2)
Tactile characters that are designed to be read by touch should not have sharp or abrasive edges.

TACTILE CHARACTER STYLE: (703.2.2 and 703.2.3)

Uppercase only.

Sans Serif type styles only.

Characters shall not be italic, oblique, script, highly decorative, or of other unusual forms.

Tactile Character Style


5/8 inch (16 mm) min. and 2 inches (51 mm) max. based on the height on the upper case "1".

Exception: 1/2 inch (13 mm) minimum when separate raised and visual characters provide the same information.

Character Height


55-110% of the character height based on the width of the upper case "O"
and the height of the upper case "I".


15% maximum of character height based on upper case "I".

Stroke Thickness

Commonly used type fonts that meet the USA 2010 Sign Standards:

Helvetica Medium, Futura Medium, Avenir, Avant Garde, Frutiger, Arial


1/8 inch (3 mm) minimum and 4 times the tactile character stroke width maximum, measured from the top surface of the tactile text, between the two closest points of adjacent characters (excluding word spaces).

Note: when using beveled letters, the law allows for a minimum character space of 1/16 inch (1.6 mm) measure from the base of the letters. Placement of beveled letters closer at the base allows for a more pleasing visual look, while maintaining enough space for tactile reading.

Character Spacing

CS = 1/8 inch (3 mm) min. for Straight-sided Characters
CS = 1/16 inch (1.6 mm) min. for Beveled Characters
Max. Character Space (CS) is 4x character stroke width for both straight-sided and beveled characters.

LINE SPACING: (703.2.8)

135% minimum and 170% maximum of the character height.

Line Spacing

2010 Standards LETTER SPACING CROSS-SECTIONS for straight sided & beveled characters:

Character Spacing Cross-Section