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<br />. <br /> <br />. <br /> <br />. <br /> <br />b. Extruded aluminum support members shall be a minimum .093" (2.36 mm) <br />thick 6063-T52 alloys; supplied pre-cut to size, including all necessary <br />stainless steel fasteners for concealed installation. <br /> <br />c. The metal cladding system including required stiffeners and sealants shall <br />meet the specified requirements for wind loading, air infiltration and water <br />penetration. <br /> <br />d. The anchorage system shall be designed so that the panels are secure, yet <br />"free floating", to accommodate expansion and contraction; and so that <br />individual panels may be installed or removed without disturbing adjacent <br />panels. Panel specifications are to be equivalent to 'Techwall' by Conspec <br />Systems. <br /> <br />6. <br /> <br />Wall Claddina - Horizontal-Shaped Profile Metal Panels: <br /> <br />Horizontal deep rib metal siding decking may be used for the major service <br />buildings exterior and may be used for public oriented building exterior cladding. <br />The siding must be of the highest quality, and seamless (no apparent <br />intermediate joints). If such siding is used for the service building, other building <br />materials must be incorporated into the design of the structure in accordance <br />with Section B.1 of these Standards. <br /> <br />The specifications for 'Steelite High Rib Panels' were used as a basis for the <br />following guidelines. The primary metals shall be galvanized steel which is a <br />quality, grade 'A' steel which meets the ASTM A446 specifications. A corrosion <br />resistant finish is achieved by a continuous hot-dip commercial galvanizing <br />process in accordance with ASTM A526 G90 (1.25 oz [275 g/m"]). This material <br />shall be the substrate for all panels. An alternative metal is galvalume which is <br />a steel sheet coated with all aluminum-zinc alloy applied by the continuous hot- <br />dip method. Galvalume provides good resistance to heat and corrosion. <br /> <br />The color coating for the panel shall be silicone polyester, which is a blend of <br />premium polyester resins and silicone. 'SP' provides a high resistance to ultra- <br />violet rays as a durable coating over G-90 (1.25 oz [275 g/m"]) galvanized steel. <br />'SP' shall meet the requirements of a long-term exterior finish with excellent <br />weather-ability. 'SP' finish shall provide an optimum use of silicone together <br />with a premium quality polyester resin for long life.. Alternately, the panel shall <br />be color coated in fluorofinish which is a premium fluorocarbon called <br />polyvinyledine fluoride, (KYNAR 500 70%). It is applied to G-90 (1.25 oz [275 <br />g/m"]) galvanized steel. Exterior performance characteristics should include <br />color integrity, film flexibility and resistance to chalking. Other important <br /> <br />Exhibit "B" <br />Page 17 of 19 <br />758-23 <br />