Hong Kong Regulations

BUILDING (CONSTRUCTION) REGULATIONS - REGULATION 38

External wall of buildings

Every external wall of a building shall be constructed of-

   (a)  masonry not less than 225 mm thick;

   (b)  plain concrete or reinforced concrete not less than 100 mm thick;

   (c)  any of the materials mentioned in paragraph (a) or (b) in combination
        with a framework of steel or reinforced concrete; or

   (d)  other suitable materials of permanent, non-combustible and impervious
        construction. (Enacted 1990)