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40-27 BUILDING METAL FABRICATIONS <br />BRPH ARCHITECTS -ENGINEERS, INC. <br />1 D. Shop Priming: Apply shop primer to comply with SSPC-PA 1, "Paint Application <br />Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting. <br />2.12 ALUMINUM FINISHES <br />A. Finish designations prefixed by AA comply with the system established by the <br />Aluminum Association for designating aluminum finishes. <br />B. As -Fabricated Finish: AA-M10 (Mechanical Finish: as fabricated, unspecified). <br />I <br />PART 3 - EXECUTION <br />3.1 INSTALLATION, GENERAL <br />A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for <br />installing metal fabrications. Set metal fabrications accurately in location, alignment, <br />and elevation; with edges and surfaces level, plumb, true, and free of rack; and <br />measured from established lines and levels. <br />B. <br />Fit exposed connections accurately together to form hairline joints. Weld connections <br />that are not to be left as exposed joints but cannot be shop welded because of shipping <br />size limitations. Do not weld, cut, or abrade surfaces of exterior units that have been <br />hot -dip galvanized after fabrication and are for bolted or screwed field connections. <br />C. <br />Field Welding: Comply with the following requirements: <br />1. Use materials and methods that minimize distortion and develop strength and <br />corrosion resistance of base metals. <br />2. Obtain fusion without undercut or overlap. <br />3. Remove welding flux immediately. <br />4. At exposed connections, finish exposed welds and surfaces smooth and blended <br />so no roughness shows after finishing and contour of welded surface matches <br />that of adjacent surface. <br />D. <br />Fastening to In -Place Construction: Provide anchorage devices and fasteners where <br />metal fabrications are required to be fastened to in -place construction. Provide <br />1 <br />threaded fasteners for use with concrete and masonry inserts, toggle bolts, through <br />bolts, lag screws, wood screws, and other connectors. <br />E. <br />Provide temporary bracing or anchors in formwork for items that are to be built into <br />concrete, masonry, or similar construction. <br />iF. <br />Corrosion Protection: Coat concealed surfaces of aluminum that will come into contact <br />with grout, concrete, masonry, wood, or dissimilar metals with the following: <br />1. Cast Aluminum: Heavy coat of bituminous paint. <br />2. Extruded Aluminum: Two coats of clear lacquer. <br />C06922.001.00 <br />055000-7 <br />05-22-14 <br />