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6 <br /> <br />1. The primary exterior surfacing of structures shall be limited to natural brick, stone, <br />or glass. Artificial or thin veneer brick or stone less than nominal four inches thick <br />shall not qualify as complying with this performance standard. <br />2. Primary exterior surface shall be defined as not less than 70 percent of the sum of <br />the area of all exterior walls of a structure nominally perpendicular to the ground. <br />All parapet or mansard surfaces extending above the ceiling height of the structure <br />shall be considered exterior surface for the purposes of this section. Windows and <br />glass doors shall be considered a primary surface, but the sum area of this glass <br />shall be deducted from the wall area for the purposes of the 70 percent primary/30 <br />percent accent formulas of this section. Doors of any type of material, except glass, <br />shall not be considered a primary exterior surface. <br />3. Each wall of the structure shall be calculated separately and, individually comply <br />with the 70/30 formula. <br />e) Performance standard--Exterior surfacing accents. Not more than 30 percent of the <br />exterior wall surfacing, as defined by subsection (f)(1)d of this section may be of the <br />following listed accent materials, but no single accent material, except natural wood, <br />may comprise more than 20 percent of the total of all accent materials; and no <br />combustible materials shall be used: <br />1. Cedar, redwood, wood siding; <br />2. Cement fiber board; <br />3. Standing seam metal; <br />4. Architectural metal; <br />5. Stucco; <br />6. Poured in place concrete (excluding tilt-up panels); <br />7. Architectural metal panels; and <br />8. Porcelain or ceramic tile. <br />f) Performance standard--Accessory structures. All accessory structures shall comply <br />with the exterior surfacing requirements specified by this section. <br />g) Performance standard--HVAC units and exterior appurtenances. All exterior <br />equipment, HVAC and trash/recycling and dock areas shall be screened from view of <br />the public with the primary exterior materials used on the principal structure. <br />h) Performance standard--Visible roofing materials. Any roofing materials that are <br />visible from ground level shall be standing seam metal, fire-treated cedar shakes, <br />ceramic tile, clay tile, concrete, or slate. <br />i) Applicability--New construction. The standards of this subsection (f)(1)d shall be <br />applicable to all structures and buildings constructed in the city, on and after the <br />effective date of the ordinance from which this section is derived. The performance <br />standards of this subchapter shall not be in any manner minimized by subsequent <br />planned unit development plans or agreement. <br />(2) Parking. Each site shall be provided with off-street automobile parking as follows: <br />a) Religious institutions: One space for each permanent and temporary four seats based <br />on the design capacity of the main assembly hall. Facilities, as may be provided in