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R409.4 Installation Height and Location. Signs with tactile characters shall comply <br />with R409.4. <br />R409.4.1 Height Above Finish Floor or Ground. Tactile characters on signs <br />shall be located 1.2 m (4.0 ft) minimum above the finish floor or ground surface, <br />measured from the baseline of the lowest tactile character and 1.5 m (5.0 ft) <br />maximum above the finish floor or ground surface, measured from the baseline of <br />the highest tactile character. Tactile characters for elevator car controls shall not <br />be required to comply with R409.4.1. <br />R409.5 Visual Characters. Visual characters shall comply with R409.5. Where visual <br />characters comply with R409.2 and are accompanied by braille complying with R409.3, <br />they shall not be required to comply with R409.5.2 through R409.5.9. <br />R409.5.1 Finish and Contrast. Characters and their background shall have a <br />non -glare finish. Characters shall contrast with their background with either light <br />characters on a dark background or dark characters on a light background. <br />Advisory R409.5.1 Finish and Contrast. Signs are more legible for persons with low <br />vision when characters contrast as much as possible with their background. Additional <br />factors affecting the ease with which the text can be distinguished from its background <br />include shadows cast by lighting sources, surface glare, and the uniformity of the text and <br />its background colors and textures. <br />R409.5.2 Case. Characters shall be uppercase or lowercase or a combination of <br />both. <br />R409.5.3 Style. Characters shall be conventional in form. Characters shall not be <br />italic, oblique, script, highly decorative, or of other unusual forms. <br />R409.5.4 Character Proportions. Characters shall be selected from fonts where <br />the width of the uppercase letter "0" is 55 percent minimum and 110 percent <br />maximum of the height of the uppercase letter "I". <br />R409.5.5 Character Height. Minimum character height shall comply with Table <br />R409.5.5. Viewing distance shall be measured as the horizontal distance between <br />the character and an obstruction preventing further approach towards the sign. <br />Character height shall be based on the uppercase letter "I". <br />Height to Finish Floor <br />or Ground From <br />Baseline of Character <br />1.0 m (3.3 ft) to less <br />than or equal to 1.8 m <br />R409.5.5 Visual Character Height <br />Horizontal Viewing <br />Distance <br />Minimum Character Height <br />less than 1.8 m (6 ft) 16 mm (0.625 in) <br />1.8 m (6 ft) and 16 mm (0.625 in), plus 3.2 mm (0.125 <br />56 <br />