2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
11B-703.5.5 Character height.
Minimum character height shall comply with Table 11B-703.5.5. Viewing distance shall be measured as the horizontal distance between the character and an obstruction preventing further approach towards the sign. Character height shall be based on the uppercase letter “I”.
Exception: Where provided, floor plans providing emergency procedures information in accordance with Title 19 shall not be required to comply with Section 11B-703.5.5.
TABLE 11B-703.5.5 VISUAL CHARACTER HEIGHT
| Height To Finish Floor Or Ground From 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 72 inches (1829 mm) | 5/8 inch (15.9 mm) |
| 72 inches (1829 mm) and greater | 5/8 inch (15.9 mm), plus 1/8 inch (3.2 mm) per foot (305 mm) of viewing distance above 72 inches (1829 mm) | |
| Greater than 70 inches (1778 mm) to less than or equal to 120 inches (3048 mm) | less than 180 inches (4572 mm) | 2 inches (51 mm) |
| 180 inches (4572 mm) and greater | 2 inches (51 mm) , plus 1/8 inch (3.2 mm) per foot (305 mm) of viewing distance above 180 inches (4572 mm) | |
| Greater than 120 inches (3048 mm) | less than 21 feet (6401 mm) | 3 inches (76 mm) |
| 21 feet (6401 mm) and greater | 3 inches (76 mm) , plus 1/8 inch (3.2 mm) per foot (305 mm) of viewing distance above 21 feet (6401 mm) |
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