[blindkid] Question about regulations for Braille signage

[Kieszak, Stephanie (CDC/CCEHIP/NCEH)]

My daughter's public school does not have permanent Braille signs on the
doors or room locations yet.  Before I bring it up again, I was hoping
to find references to regulations concerning Braille signs in public
buildings. I tried searching under ADA but wasn't having much success.
Can anyone point me to some references? Also, what is the recommendation
for the height of the signage?  My daughter just entered 1st grade and,
unless things go horribly wrong, she'll be in this school until 6th
grade.  We want the signs to be low enough for her to reach them at age
6, but still at a good height at age 11.
Thank you.
Stephanie