New federal guidelines for ADA signage interpretation and regulation have been employed
since March 2012. Key changes to take into account include:

  1. Mounting Height of Signs: Signs identifying permanent rooms and spaces must be
    mounted with the baseline of the raised tactile characters between 48” and 60” above the
    finished floor (previously this dimension was 60” to the middle of the sign).
  2. Contrast between lettering and background is no longer required to be 70%. However,
    the environmental graphics community and most ophthalmologists agree that dark
    lettering on light backgrounds is more suitable for the aging eye.
  3. All characters must be kerned (spaced) 1/8”.
  4. Stroke Width of an uppercase “I” cannot exceed 15% of the letter height.
  5. Grade II condensed Braille must accompany the permanent Room ID and be domed
    (hemispheric) in shape.
  6. If pictograms are used, the background field must be at least 6” and any text
    accompanying the pictogram should be centered under the field.
  7. Overhead signs may now use 2” high text (as opposed to 3” under previous
    specifications). The signs must have an 80” clearance between the bottom of the sign and
    the floor. This also includes right-angle flag mounted components.