703 Signs
Advisory 703.2 Raised Characters. Signs that are designed to be read by touch should not have sharp or abrasive edges.
Measurement Range | Minimum in Inches Maximum in Inches |
---|---|
1. Measured center to center. | |
Dot base diameter | 0.059 (1.5 mm) to 0.063 (1.6 mm) |
Distance between two dots in the same cell 1 | 0.090 (2.3 mm) to 0.100 (2.5 mm) |
Distance between corresponding dots in adjacent cells 1 | 0.241 (6.1 mm) to 0.300 (7.6 mm) |
Dot height | 0.025 (0.6 mm) to 0.037 (0.9 mm) |
Distance between corresponding dots from one cell directly below 1 | 0.395 (10 mm) to 0.400 (10.2 mm) |
Advisory 703.5.1 Finish and Contrast. Signs are more legible for persons with low vision when characters contrast as much as possible with their background. Additional factors affecting the ease with which the text can be distinguished from its background include shadows cast by lighting sources, surface glare, and the uniformity of the text and its background colors and textures.
Height to Finish Floor or Ground from Baseline of Character | Horizontal Viewing Distance | Minimum Character Height |
---|---|---|
40 inches (1015 mm) to less than or equal to 70 inches (1780 mm) | less than 72 inches (1830 mm) | 5/8 inch (16 mm) |
72 inches (1830 mm) and greater | 5/8 inch (16 mm), plus 1/8 inch (3.2 mm) per foot (305 mm) of viewing distance above 72 inches (1830 mm) | |
Greater than 70 inches (1780 mm) to less than or equal to 120 inches (3050 mm) | less than 180 inches (4570 mm) | 2 inches (51 mm) |
180 inches (4570 mm) and greater | 2 inches (51 mm), plus 1/8 inch (3.2 mm) per foot (305 mm) of viewing distance above 180 inches (4570 mm) | |
greater than 120 inches (3050 mm) | less than 21 feet (6400 mm) | 3 inches (75 mm) |
21 feet (6400 mm) and greater | 3 inches (75 mm), plus 1/8 inch (3.2 mm) per foot (305 mm) of viewing distance above 21 feet (6400 mm) |
Advisory 703.6.2 Finish and Contrast. Signs are more legible for persons with low vision when characters contrast as much as possible with their background. Additional factors affecting the ease with which the text can be distinguished from its background include shadows cast by lighting sources, surface glare, and the uniformity of the text and background colors and textures.
Advisory 703.7.1 Finish and Contrast. Signs are more legible for persons with low vision when characters contrast as much as possible with their background. Additional factors affecting the ease with which the text can be distinguished from its background include shadows cast by lighting sources, surface glare, and the uniformity of the text and background colors and textures.