(a) In the No. 2 Fire District, as described in Chapter 1331, wall signs exceeding forty square feet in area shall be of noncombustible material except that such signs placed against a building or structure which is of wood frame construction or which could be of wood frame construction under this Building Code may be of combustible material. In the No. 1 Fire District, as described in Chapter 1331, all signs must be of noncombustible material, except that cappings, decorations, lettering and mouldings may be of combustible material in any wall sign.
(b) Wall signs shall be securely attached to the building or structure by means of metal anchors, bolts or expansion screws. No wood blocks or anchorage with wood used in connection with screws or nails shall be considered proper anchorage, except in the case of wall signs attached to buildings or structures with walls of wood. No wall sign shall be entirely supported by an unbraced parapet wall. (Ord. 8904. Passed 12-9-57.)