11A - ORDINANCE NO.. NS-2650 - Laserfiche WebLink

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panels. Panel specifications are to be equivalent to 'Techwall' by Conspec Systems. 6. Wall Claddinq - Horizontal-ShaDed Profile Metal Panels: Horizontal deep rib metal siding decking may be used for the major service buildings exterior and may be used for public oriented building exterior cladding. The siding must be of the highest quality, and seamless (no apparent intermediate joints). If such siding is used for the service building, other building materials must be incorporated into the design of the structure in accordance with Section B.1 of these Standards. The specifications for 'Steelite High Rib Panels' were used as a basis for the following guidelines. The primary metals shall be galvanized steel which is a quality, grade 'A' steel which meets the ASTM A446 specifications. A corrosion resistant finish is achieved by a continuous hot-dip commercial galvanizing process in accordance with ASTM A526 G90 (1.25 oz [275 g/m2]). This material shall be the substrate for all panels. An alternative metal is galvalume which is a steel sheet coated with all aluminum-zinc alloy applied by the continuous hot- dip method. Galvalume provides good resistance to heat and corrosion. The color coating for the panel shall be silicone polyester, which is a blend of premium polyester resins and silicone. 'SP' provides a high resistance to ultra- violet rays as a durable coating over G-90 (1.25 oz [275 g/m"]) galvanized steel. 'SP' shall meet the requirements of a long-term. exterior finish with excellent weather-ability. 'SP' finish shall provide an optimum use of silicone together with a premium quality polyester resin for long life. Alternately, the panel shall be color coated in fluorofinish which is a premium fluorocarbon called polyvinyledine fluoride, (KYNAR 500 70%). It is applied to G-90 (1.25 oz [275 g/m"]) galvanized steel. Exterior performance characteristics should include color integrity, film flexibility and resistance to chalking. Other important properties of finish shall be high resistance to ultra-violet radiation, and resistance to weathering. The panel profile that is encouraged to be used is deep profile rib 18-gauge minimum run horizontally. Maximum permissible deflection is to be 1/120. Hat shaped and "Z"-shaped subgirts should be placed at every structural support and not more than 4'-0" (1.22 mm) on cènter between supports. Trueness of material and quality of workmanship, with proper detailing of material termination, shall be of the utmost importance. 7. Plaster: Smooth plaster (stucco) may be used but is not highly recommended because of uncertainty in surface quality control. If plaster is used, the highest degree of Exhibit "B" Page 17 of 19 11 A-22