2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017
11B-703.8.4 Character height. The uppercase letter “I” shall be used to determine the allowable height of all low resolution VMS characters of a font. Viewing distance shall be measured as the horizontal distance between the character and an obstruction preventing further approach towards the sign. The uppercase letter “I” of the font shall have a minimum height complying with Table 11B-703.8.4.
Exception: In assembly seating where the maximum viewing distance is 100 feet (30.5 m) or greater, the height of the uppercase “I” of low resolution VMS fonts shall be permitted to be 1 inch (25 mm) for every 30 feet (9144 mm) of viewing distance, provided the character height is 8 inches (203 mm) minimum. Viewing distance shall be measured as the horizontal distance between the character and where someone is expected to view the sign.
TABLE 11B-703.8.4 LOW RESOLUTION VMS CHARACTER HEIGHT
| HEIGHT ABOVE FLOOR TO BASELINE OF CHARACTER | HORIZONTAL VIEWING DISTANCE | MINIMUM CHARACTER HEIGHT |
| 40 inches (1016 mm) to less than or equal to 70 inches (1778 mm) | Less than 10 feet (3048 mm) | 2 inches (51 mm) |
| 10 feet (3048 mm) and greater | 2 inches (51 mm), plus 1/5 inch (5.1 mm) per foot (305 mm) of viewing distance above 10 feet (3048 mm) | |
| Greater than 70 inches (1778 mm) to less than or equal to 120 inches (3048 mm) | Less than 15 feet (4572 mm) | 3 inches (76 mm) |
| 15 feet (4572 mm) and greater | 3 inches (76 mm), plus 1/5 inch (5.1 mm) per foot (305 mm) of viewing distance above 15 feet (4572 mm) | |
| Greater than 120 inches (3048 mm) | Less than 20 feet (6096 mm) | 4 inches (102 mm) |
| 20 feet (6096 mm) and greater | 4 inches (102 mm), plus 1/5 inch (5.1 mm) per foot (305 mm) of viewing distance above 20 feet (6096 mm) |
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