2010 ADA Standards for Accessible Design

TECHNICAL CHAPTER 7: COMMUNICATION ELEMENTS AND FEATURES Table 703.3.1 Braille Dimensions Minimum in Inches Measurement Range Maximum in Inches Dot base diameter 0.059 (1.5 mm) to 0.063 (1.6 mm) Distance between two dots in the same cell1 0.090 (2.3 mm) to 0.100 (2.5 mm) Distance between corresponding 0.241 (6.1 mm) dots in adjacent cells1 to 0.300 (7.6 mm) Dot height 0.025 (0.6 mm) to 0.037 (0.9 mm) Distance between corresponding dots 0.395 (10 mm) from one cell directly below1 to 0.400 (10.2 mm) 1. Measured center to center. Figure 703.3.1 Braille Measurement 703.3.2 Position. Braille shall be positioned below the corresponding text. If text is multi-lined, braille shall be placed below the entire text. Braille shall be separated 3/8 inch (9.5 mm) minimum from any other tactile characters and 3/8 inch (9.5 mm) minimum from raised borders and decorative elements. 188 - 2010 Standards: Titles II and III Department of Jus2ti2c5e Titles II and III - 2010 Standards - 159