703.5.5 Character Height.
Minimum character height shall comply with Table 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”.
| 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) |
| 40 Inches (1015 mm to less than or equal to 70 inches (1780 mm) | 72 inches (1830 mm) and greater | 5/8 inch (16 mm), plus 1/8 inch (3.2 mm) per foot (305 mm) or 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) |
| Greater than 70 inches (1780 mm) to less than or equal to 120 inches (3050 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) |
| Greater than 120 inches (3050 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) |
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