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F.Cure data-time/temperature/relative humidity.
G.Final inspection and acceptance by the QCI. Submit the format for the JCR to the Fabrication Engineer for r eview prior to beginning application of protective coating. Provide work area illumination as follows: Work Area Illumination Requirements in Foot Candles Description of Work Minimum Recommended General Work Area Illumination 10 20 Surface Preparation and Coating 20 50 Inspection 50 200 Provide a light meter that measures illumination in foot candle s. Use SSPC-VIS 1, Guide and Reference Photographs for Steel Surfaces Prepared by Dry Abrasive Blast Cleaning or SSPC-VIS 3, Guide and Reference Photographs for Steel Surfaces Prepared by Hand and Power Tool Cleaning as required in order to determine acceptable surface cleanliness. Measure and record the environmental conditions during applicat ion and during the entire curing cycle. Failure to provide accurate and complete environmental data may result in rejection of the coating or an extended cure time as determi ned by the Fabrication Engineer. Measure and record the DFT of each coat in accordance with SSPC-PA 2 , Measurement of Dry Coating Thickness with Magnetic Gages (PA 2). ZINC RICH COATING SYSTEM
506.10 Description This work shall consist of surface preparat ion and application of
coating systems in accordance with the Plans and this Specifica tion. The color of structural steel painted in its entirety shall comply with Federal Standar d 595, Color No. 14272 (Green), unless otherwise specifi ed in the Contract. The color of partially painted weathering steel shall comply with Federal Standard 595, Color No. 30045 (Brown), unless otherwise specified in the Contr act. All other coating colors s hall be as specified in the Contract.
506.11 Materials Coatings systems shall be from the Northeast Protective Coating
Committee (NEPCOAT) Qualified Pr oducts List (QPL), list A or B. The list may be found through NEPCOAT’s Web page: http://www.nepcoat.org. Provide the paint batch descrip tion, lot number, date of manufa cture, shelf life and the manufacturer’s storage requirements to the QAI. Provide the ma nufacturer's published data sheet for each coat of the coating system including equipment, surface cleanliness, anchor 5-92 profile, mixing, thinning, application, and cure time for the e ntire range of allowable environmental conditions and the DFT.
506.12 Limits of Work Coat all surfaces exposed in the assembl ed product unless
otherwise specified. Apply a mist coat, 0.5 to 1.0 mils, of pr imer only to surfaces to be embedded in concrete. Apply primer to faying surfaces of bolted connections that deve lop a class B slip coefficient in accordance with the “Specification for Structural Joints Using ASTM A325 or A490 Bolts” by the Research Council of Structural Connections (RCSC). Provide documentation to demonstrate that the primer was tested and the requirements were met. Do not exceed the DFT applied for test purposes.
506.13 Surface Preparation Surface cleanliness shall be SSPC-SP 10, Near-White Blast
Cleaning (SP 10) unless a higher standard of surface cleanliness is requ ired by the manufacturer's published data sheet. Round all corners exposed in the assembled product to approximately a 3/32 inch radius, prior to abrasive blast clean ing. A series of tangents that approximate a radius may be considered as a rounded edge if the re are no sharp breaks. Provide radius gauges to inspect corner preparation. The radiu s shall be the minimum specified above, but not greater than 3/16 inch. The abrasive blast media shall meet the requirements of SSPC-AB 1, Mineral and Slag Abrasives, AB 2, Cleanliness of Recycled Ferrous Metallic Abrasives and/or AB 3, Ferrous Metallic Abrasive . The anchor profile shall be angular and meet the requirement s of the coating manufacturer's published data sheet. If compressed air is used for abrasive blast cleaning, perform a blotter test ASTM D4285 at the beginning of each shift and at any time requested by the QAI. Notify the QAI prior to performing the test. Measure and record the anchor profile in accordance with ASTM D 4417 Method C (replica tape). If the anchor profile fails to meet the minimu m requirements, re-blast the substrate until the required anchor profile is achieved. If th e anchor profile exceeds the maximum allowed, generate a Non-Conformance Report (NCR) descri bing the condition of the substrate and a proposed solution and submit it to the Fabr ication Engineer for review. Measure the anchor profile of the substrate on every plane of e ach beam or girder. If it has been established to the satisfaction of the QAI that the ab rasive blast equipment is capable of providing uniform, acceptable anchor profile, a dimi nished degree of testing may be allowed at the discretion of the Fabrication Engineer. The allowable time between abrasive blast cleaning and primer a pplication shall not exceed the manufacturer’s published recommendations or one work shift, whichever is less. Any evidence of rust bloom, flash rust or other surface conditi ons that cause the substrate cleanliness to fall outside the specified cleanliness standard will be rejected. Inspect all
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 383–384 of 817.