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<br />4. <br /> <br />Wall Cladding - Flat Metal Panels: <br /> <br />Smooth aluminum panels may be used in flat or curved cladding for the opaque showroom and office <br />exterior wall cladding. This also applies to service building cladding termination (ends, fascias, <br />soffits and comers). Quality and trueness of material (e.g., no oil-canning permitted) and <br />workmanship are of the utmost importance. <br /> <br />Panels shall be solid aluminum, and shall be impervious to water, and non-flammable. The panel <br />edges shall be brake-formed at right angles to the frontal plane and all comers are to be welded and <br />ground smooth. It shall provide a front access fastening system which means individual panels may <br />be removed at any time. The thermally dynamic fastening system shall insure maximum weather <br />integrity. The system shall also include an internal drainage system which directs condensation to the <br />outside of the building. The finish shall be an anodized or Kynar Tri-X metallic finish. <br /> <br />5. <br /> <br />Materials: <br /> <br />a. Panels shall be fabricated from minimum .120 (3.04 mm) thick aluminum solid plate of 3003- <br />H134 or 5005-H32 AQ alloy, in accordance with architectural documents and manufacturer's <br />approved drawings including verified dimensions. <br /> <br />b. Extruded aluminum support members shall be a minimum .093" (2.36 mm) thick 6063-T52 <br />alloys; supplied pre-cut to size, including all necessary stainless steel fasteners for concealed <br />installation. <br /> <br />c. The metal cladding system including required stiffeners and sealants shall meet the specified <br />requirements for wind loading, air infiltration and water penetration. <br /> <br />d. The anchorage system shall be designed so that the panels are secure, yet "free floating", to <br />accommodate expansion and contraction; and so that individual panels may be installed or <br />removed without disturbing adjacent panels. Panel specifications are to be equivalent to <br />'Techwall' by Conspec Systems. <br /> <br />6. <br /> <br />Wall Cladding - Horizontal-Shaped Profile Metal Panels: <br /> <br />Horizontal deep rib metal siding decking may be used for the major service buildings exterior and <br />may be used for public oriented building exterior cladding. The siding must be of the highest <br />quality, and seamless (no apparent intermediate joints). If such siding is used for the service <br />building, other building materials must be incorporated into the design of the structure in accordance <br />with Section B.l of these Standards. <br /> <br />The specifications for 'Steelite High Rib Panels' were used as a basis for the following guidelines. <br />The primary metals shall be galvanized steel which is a quality, grade' A' steel which meets the <br />ASTM A446 specifications. A corrosion resistant finish is achieved by a continuous hot-dip <br />commercial galvanizing process in accordance with ASTM A526 G90 (1.25 oz [275 glm>]). This <br />material shall be the substrate for all panels. An alternative metal is galvalume which is a steel sheet <br />coated with all aluminum-zinc alloy applied by the continuous hot-dip method. Galvalume provides <br />good resistance to heat and corrosion. <br /> <br />75a~5~4 <br />