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t <br />t <br />1 <br />1.08 ON -SITE CONDITIONS <br />A. By bidding, CONTRACTOR acknowledges that he has visited the site and is familiar <br />with the site and all conditions under which this work is to occur. <br />PART 2 - PRODUCTS <br />2.01 MATERIALS <br />A. Adhesives: Silicone adhesive used for installing sign items shall be as manufactured <br />by General Electric, Dow Corning, or equal. Polyfoam or "Isotac" contact adhesive <br />tape, manufactured by 3 -M, shall be used in conjunction with silicone adhesives for <br />installation of signs, in minimum thicknesses available. <br />B. All Specified Metals: Aluminum shall be suitable for ornamental, architectural <br />Work. Surface finish shall be smooth, free of extrusion marks or imperfections. <br />Alloy shall be selected to meet the structural requirements of the specific <br />application and finished on all surfaces to resist corrosion in the environment in <br />which it is installed. The aluminum alloy shall be 5052 which is the strongest <br />non - heat - treatable sheet and plate alloy in common use. It has good workability <br />and is tough with excellent resistance to salt water corrosion. The aluminum <br />alloy is to meet the following specifications: <br />NOMINAL CHEMICAL COMPOSITION <br />Magnesium 2.5% <br />Chromium 0.25% <br />Aluminum Balance(incl. normal impurities) <br />' <br />Typical Mechanical Properties <br />5052 -0 <br />5052 -1432 <br />5052 -H34 <br />Tensile Strength, psi <br />28,000 <br />33,000 <br />38,000 <br />Yield Strength, psi <br />13,000 <br />28,000 <br />31,000 <br />Elongation, % in 2 in. <br />25 <br />12 <br />10 <br />Sheer Strength, psi <br />18,000 <br />20,000 <br />21,000 <br />tBrinell <br />Hardness, 10 1500 <br />47 <br />60 <br />66 <br />' <br />Typical Physical Properties <br />Density, Lbs /Cu. in. <br />0,097 <br />0.097 <br />0.097 <br />Melting Range, approx. °F <br />1100 -1200 <br />1100 -1200 <br />1100 -1200 <br />Electrical Conductivity, <br />% IACS at 20 °C(88 °F) <br />35 <br />35 <br />35 <br />02841 -4 <br />t <br />