(A) General. Solid brick walls shall be not less than eight inches thick with a header course at least every seventh course.
(B) Hollow masonry. The minimum thickness of bearing walls of structural clay tile or concrete masonry shall be not less than eight inches and shall have full mortar coverage on vertical and horizontal face shells.
(C) Brick veneer. Thickness of brick veneer shall be not less than three and three-fourths inches, properly anchored with rust resisting wall ties, at least one tie every three square feet and must rest on foundation.
(D) Existing walls. No existing wall shall be used for renewal or extension of a building or be increased in height without special written permission of the Code Administrator.
(1990 Code, § 8.15)