Special Provision No. 911S07 October Coating the Ends of New Steel Girders with the Epoxy-Zinc/Epoxy/Polyurethane System

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1 COATING NEW STRUCTURAL STEEL - Item No. Special Provision No. 911S07 October 2000 Coating the Ends of New Steel Girders with the Epoxy-Zinc/Epoxy/Polyurethane System REFERENCES Section of OPSS 911 is amended by the addition of the following under American Society for Testing Materials : ASTM C Total Moisture Content of Aggregate by Drying ASTM D Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel. ASTM D Conductimetric Analysis of Water Soluble Ionic Contamination of Blasting Abrasives. Section of OPSS 911 is further amended by replacing Steel Structures Painting Council: Systems and Specifications, Fifth Edition, 1989 with the following: The Society for Protective Coatings (SSPC): SSPC - AB Mineral and Slag Abrasives SSPC - PA Shop, Field and Maintenance Painting of Steel SSPC - PA Measurement of Dry Paint Thickness with Magnetic Gauges SSPC - SP Solvent Cleaning SSPC - SP White Metal Blast Cleaning SSPC - SP Pickling SSPC - SP Near White Blast Cleaning SSPC - VIS Visual Standard for Abrasive Blast Cleaned Steel SSPC - VIS Visual Standard for Power and Hand-Tool Cleaned Steel DEFINITIONS Section of OPSS 911 is amended by the addition of the following: Final Surface Preparation: means surface preparation standard(s) specified in the contract documents. Interim Surface Preparation: means an initial surface preparation that is done prior to the application of a coating that does not meet the requirements for the specified final surface preparation standard. To the term "Structural Steel", the phrase "structural steel piles", is added SUBMISSION AND DESIGN REQUIREMENTS Written Notices, Drawings, Certificates and Product Data Sheets Subsection Clause of OPSS 911 is amended by the addition of the following: October 2000 Pg. 1 of 5 SSP911S07

2 The product data sheets shall also indicate the recommended maximum dry film thickness for each coating material and the minimum acceptable re-coat time period for -5 C and -10 C in case the temperature drops steeply after coating application. Prior to abrasive blasting a report from a certified laboratory certifying the abrasive media meets the material requirements specified herein shall be submitted to the Contract Administrator Pre-Start Material Sample Subsection of OPSS 911 is deleted MATERIALS Coating Systems - Except Hot Dip Galvanizing and Metallizing Subsection of OPSS 911 is deleted and replaced by the following: All coating systems shall conform to OPSS 1704, November 1990, amended as follows: REFERENCES Section of OPSS 1704, November 1990 is amended by the addition of the following under "American Society for Testing and Materials". ASTM D Standard Practice for Determining Volatile Organic Compound Content of Paint and Related Coatings Section of OPSS, November 1990 is further amended by the addition of the following: US General Services Administration 470 East L Enfant Plaza SW, Suite 8100 Washington, DC Federal Standard 595B Colors General Subsection of OPSS 1704, November 1990 is amended by the addition of the following: c) To qualify as a low volatile organic compound (VOC) coating, a product shall contain not more than 350 grams per litre of VOCs as defined in ASTM D Table 1 in OPSS 1704, November 1990 is amended by the addition of the following: CGSB 1-GP-71 Method ASTM SSPC Tolerances VOC Content n.a. D n.a. ±10% but total not to exceed 350 g/l October 2000 Pg. 2 of 5 SSP911S07

3 Material shall be delivered to the job site or the fabrication shop in the manufacturer's sealed containers bearing the manufacturer's labels conforming to OPSS Colour Subsection of OPSS 1704, November 1990 is amended by deleting the second paragraph and replacing it with the following: Successive coats shall be formulated to show distinct colour difference. With the exception of coal tar epoxies, the colour of the finish coat shall be US Federal Standard 595B Colour brown for ACR steel and US Federal Standard 595B Colour grey for all other steel. Table 1 of OPSS 1704, November 1990 is amended by the deletion of the tolerances for gloss: CGSB 1-GP-71 Method Physical Tests Gloss MATERIAL Section of OPSS 911 is amended by addition of a subsection on Abrasive Media Abrasive Media Abrasive media when tested according to ASTM D 4940 shall have a conductivity not exceeding 1000 micro seimens. Except as specified for abrasive blast cleaning of galvanized surfaces, the abrasive media shall have a hardness of 6 or greater on the Mohs scale. There shall be no presence of oil. The testing for hardness and presence of oil shall be according to SSPC-AB1. The maximum moisture shall be 0.5% by weight when tested according to ASTM C CONSTRUCTION General Surface Preparation Subsection Clause of OPSS 911 is amended by the addition of the following: All structural steel including diaphragms, but excluding surfaces in contact with concrete and the contact surfaces of bolted joints, shall be cleaned to the requirements of SSPC-SP10-94 and coated for a distance of 3000 mm from the ends of the girders Operational Constraints Subsection Clause of OPSS 911 is amended by deleting the first paragraph and replacing it with the following: October 2000 Pg. 3 of 5 SSP911S07

4 Final surface preparation operations shall only be carried out when the temperature and moisture conditions satisfy the criteria specified in SSPC-PA1 for coating application. The temperature and moisture limitations do not apply to interim surface preparation. However the contractor shall notify the contract administrator the intention to carry out interim surface preparation prior to the commencement of interim surface preparation Application of Coating Subsection Clause of OPSS 911, is amended by the addition of the following Low Volatile Organic Compound (VOC) Coating Systems: Epoxy-Zinc/Epoxy/Polyurethane System The epoxy-zinc/epoxy/polyurethane system consists of three coats and shall conform to Table A. TABLE A Amercoat Canada Corrosion Service Co. Ltd. Coat Dry Film Thickness Dry Film Thickness Prime 75 µm minimum 75 µm minimum Second 100 µm minimum 75 µm minimum Third 50 µm minimum 75 µm minimum Subsection Clause of OPSS 911, is further amended by the addition of the following: The coating system to be used is the low VOC epoxy-zinc/epoxy/polyurethane system. All structural steel including diaphragms, but excluding surfaces in contact with concrete and the contact surfaces of bolted joints, shall be coated for a distance of 3000 mm from the ends of the girders. Clauses to of OPSS 911 are deleted Quality Control Subsection Clause of OPSS 911 is amended by the addition of the following: As an alternative to calibrating the magnetic gauge on the prepared surface, the Contractor may provide an uncoated 300 x 300 x 6 mm steel reference plate sample of similar steel and surface preparation for gauge calibration Time Between Surface Preparation and Prime Coat Application The second sentence of the subsection clause of OPSS 911 is deleted and replaced with the following: October 2000 Pg. 4 of 5 SSP911S07

5 When the prepared metal is exposed outdoors, the maximum time between final surface preparation operation and prime coat application shall be 10 hours Application General Subsection Clause of OPSS 911 is deleted and replaced with the following: All three coats shall be applied in the shop QUALITY ASSURANCE Inspection Subsection of OPSS 911 is deleted and replaced with the following: Each phase of the work will require inspection by the Contract Administrator before proceeding to the next phase. Acceptance of the surface preparation will be based on the applicable SSPC surface preparation specifications and pictorial standards given in SSPC-VIS1 and SSPC-VIS Measurement of Surface Profile Subsection of OPSS 911 is deleted and replaced with the following: Surface profile measurements will be made on a random basis by use of a spring micrometer and extra coarse, pressure sensitive replica tape in accordance with ASTM D Measurement of Coating Thickness Subsection of OPSS 911 is amended by the addition of the following: The specified maximum dry film thickness used to determine acceptability of coating thickness in accordance with SSPC-PA-2 shall be the manufacturer s recommended maximum, as shown in product data sheets submitted. The magnetic gauges used by the Contract Administrator will be calibrated by the Contract Administrator in the presence of the Contractor Testing of Coating Materials Subsection of OPSS 911 is deleted and replaced with the following: Each batch of coating material shall be field sampled at the request and in the presence of the Contract Administrator. Sample containers will be supplied by the Contract Administrator. October 2000 Pg. 5 of 5 SSP911S07