“Sign” includes all structural members and, without limitation, the following types of signs:35. “Wall sign” means any sign painted on or attached to and erected and confined within the limits of the outside wall of any building and supported by such wall or building and which displays only one advertising surface. Awning, canopy, and window for the purposes of this definition, the window area is not calculated for temporary “sale” and “special product announcements” signs signs are considered wall signs for the purposes of this definition. In addition, single sided signs located parallel to the building wall, in the same building elevation, and separated from the wall are considered wall signs for the purposes of this definition. “Sign area” means, for regularly shaped signs, the simple area of the sign. For irregularly shaped signs, the area shall be that of the rectangle, triangle or circle whichever is smaller or logical outer boundary of a polygon which will wholly contain the sign; provided, that the outer boundary of the polygon does not protrude beyond the sign as determined by the city administrator or his/her designee.