Wall shall mean any structure or device required by this ordinance for screening purposes forming a physical barrier, which is so constructed that fifty (50) percent or more of the vertical surface is closed and prevents the passage of light, air and vision through said surface in a horizontal plane. This shall include concrete, concrete block, wood or other materials that are solids and are so assembled as to form a screen.
Where a solid wall is specified, one hundred (100) percent of the vertical surface shall be closed, except for approved gates or other access ways.
Where a masonry wall is specified, said wall shall be concrete block, brick, stone or other similar material and one hundred (100) percent of the vertical surface shall be closed, except for approved gates or other access ways.
Corral shall mean a fence-type structure consisting of vertical posts and horizontal members, and so constructed that seventy-five (75) percent or more of the vertical surface is open. Chain link or other similar types of wire fences are not intended to be included in this definition and shall be classified as a fence or wall.