Existing signs or not...... just because the guy before you didn't follow proper procedure, doesn't mean you don't have to follow the rules.
I can't tell you how many buildings over the years, large and small, we've had to do over completely in order to meet ADA codes. Many times signs haven't been changed or the building was up to old codes, hence nothing had to be done, but once you start adding or changing things around, as a professional sign person, you must be sure you are giving your client the latest in fire, ADA and building codes.... or you are at fault, not your customer, just because they didn't want to spend the extra money.
It's your job to know ALL the laws and codes about ALL signs, not just the ones you want to address.
If a sign has to hang and needs to be ADA, then the sign cannot be hung, but a place needs to be found where a handicapped person can access it. Even if customers or patrons don't come into the area, you still need it for any present or future employees. It's the law.
If you can't make them yourself, you might want to do a google and find one of the many places that now provide ADA signs.
