When noncombustible signs or sign structures are required, all parts, including the supporting structure, shall be of noncombustible material. However, wood, approved plastic or other material not more combustible than wood or approved plastic shall be permitted in the following locations:
(a) For small ornamental moldings, cappings, nailing strips, individual letters, symbols, figures and insignia;
(b) On the face of a sign, provided that the aggregate area of such facing for any sign shall not exceed 100 square feet, and for a group of signs such aggregate area shall not exceed 200 square feet; and
(c) For posts and braces on ground signs whose total height is not more than 20 feet above grade level.
(Ord. 76-36, passed 6-22-1976)