A. Masonry is that form of construction in which noncombustible masonry units such as stone, brick, concrete block or tile, hollow clay tile, gypsum block or other similar materials or building units or a combination of these materials are laid up unit by unit and set in mortar. The minimum permissible thickness of walls and partitions of masonry, and the quality of these materials, shall conform to The American Standard Building Code Requirements for Masonry, 1944 Edition, published by the National Bureau of Standards of the United States Department of Commerce.
B. Masonry bearing walls, party walls, fire walls, fire division walls, exterior panel walls, enclosure walls or curtain walls, eight inches (8") or less in thickness, must be laid in Portland cement or cement-lime mortar as defined in Section 9-1-6-3 of this Chapter (1964 Code § 293)