Any sign hung, suspended, projected or otherwise placed over or across, or partly over any sidewalk or curbing shall have its lower edge not less than eight  feet above the sidewalk or curbing, and the owner shall keep it in such condition that the public will not be exposed to danger therefrom. The Building Inspector shall periodically inspect all such signs and, if any are found to be in an unsafe condition, he or she shall report the same to the City Manager and shall also notify the person owning or maintaining the signs to either remove the same or make such alterations or repairs forthwith as to make the same conform to the provisions of this section.
(`90 Code, § 18-3)