"Wall" means any structure or device forming a physical barrier which is so constructed that fifty percent or more of the vertical surface is closed and prevents the passage of light, air, and vision through the surface in a horizontal plane. The special standards of Section 20.68.110 shall apply.
(Ord. 84- 08-929 § 1: prior code § 19.08.840 (Ord. 557 § 105(W) (part), 1964))