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kl��I <br />560 -7,2 Mechanical Cleaning of Structural Steel: Mechanically clean steel in <br />accordance with SSPC -SP 2 or SSPC -SP 3. Remove all weld slag, weld spatter, and foreign <br />matter from welds prior to abrasive blasting. <br />560 -7.3 Abrasive Blasting of Structural Steel: Prepare steel by abrasive blasting to <br />"Near- White" metal condition as defined in SSPC -SP10. Determine "Near- White" condition <br />according to NACE Visual Standard No. 2. Ensure all rust is completely removed from pits <br />and depressions. Remove all abrasive residues from the surface, leaving it clean and dry <br />prior to the application of coatings. After blast cleaning, ensure the surface profile meets <br />the coating manufacturer's requirements. <br />Perform all abrasive blasting within a containment system to ensure <br />confinement of all particulates. Design the containment system to comply with all <br />applicable Federal, State, and Local regulations. Ensure the blasting operations does not <br />produce holes, cause distortion, remove metal, or cause thinning of the substrate. <br />Successful testing for chlorides and other salts in abrasive material does not <br />negate the final acceptance testing of steel surfaces. Do not use ungraded abrasive, select <br />abrasives and grade to provide a surface profile to the specified depth per coating <br />manufacturer recommendations. Ensure the abrasives used do not produce an additional <br />surface profile on abrasion - sensitive surfaces. <br />560 -8 Surfaces Not to be Coated. <br />560 -8.1 Galvanized Surfaces: Do not coat galvanized surfaces unless specified in <br />the Contract Documents. <br />560 -8.2 Surfaces to be in contact with Concrete: Do not coat the areas of contact <br />surfaces of steel to be encased or embedded in concrete, or coated with concrete, unless <br />specified in the Contract Documents. <br />However, when steel surfaces are to be coated with an inorganic zinc <br />coating system, coat the areas of contact surfaces embedded in concrete or coated in <br />concrete with the inorganic zinc prime coat, <br />As an exception, surfaces of shear connectors may or may not be coated. <br />When surfaces of shear connectors are coated, the requirements for surface cleaning and <br />minimum film thickness will not apply; however, remove runs, sags and cracks in the <br />coating film. <br />560 -8.3 Faying Surfaces: Protect contact surfaces of members to be joined by high - <br />strength bolts in friction -type joints that are not be coated, from all coatings or foreign <br />material. <br />560 -8.4 Machine Finished Surfaces: Apply a coating of rust preventative compound <br />to all machine finished or similar surfaces that are not be coated, or will not be coated <br />immediately. <br />560 -8.5 Surfaces to be Welded: Mask off surfaces within 1 inch of field welded <br />connections before the application of any shop coating. <br />560 -9 Material Storage. <br />Store coating materials in conformance with manufacturer's recommendations and <br />Section 6. <br />560 -10 Mixing and Thinning. <br />Mix in accordance with the manufacturer recommendations. Perform all mixing <br />operations over an impervious surface with provisions to prevent runoff to grade of any <br />March 2007 01000 -131 03- 4122.D " `' <br />