R4-15-96

POWER TOOL CLEANING OF STRUCTURAL STEEL

619-B-124

 

The Standard Specifications are revised as follows:

SECTION 619, LINE 45, INSERT AS FOLLOWS:
requirement will not apply to shop painting. This requirement will also not apply if the work consists only of cleaning and painting bearings at end bents, or small sections of beams at end bents or at piers with open joints.

SECTION 619, LINE 92, INSERT AS FOLLOWS:
Near-white blast cleaning shall otherwise be in accordance with SSPC SP 10. The blasting compressed air shall pass through an oil and water extractor before entering another apparatus.

SECTION 619, LINE 101, INSERT AS FOLLOWS:
Commercial blast cleaning shall otherwise be in accordance with SSPC SP6. The blasting compressed air shall pass through an oil and water extractor before entering another apparatus.

SECTION 619, BEGIN LINE 104, DELETE AND INSERT AS FOLLOWS:
that dust or other contaminants do not fall on wet, newly-painted surfaces. The steel surfaces shall be cleaned in accordance with 619.05(a) and 619.05(b) before hand tool cleaning. All loose, non-adherent paint, rust or rust mill scale shall be removed in accordance with SSPS SP2, Specification for Hand Tool Cleaning before the steel is washed. Peeling or flaking paint

SECTION 619, LINE 109, DELETE AND INSERT AS FOLLOWS:
wire brushed. After hand tool cleaning, dirt, dust, or similar contaminants shall be removed by means of acceptable methods which include brushing, blowing off surfaces with clean dry air, or vacuum cleaning.

(f) Power Tool Cleaning. Cleaning and painting shall be so programmed such that dust or other contaminants do not fall on wet newly painted surfaces. Power tool cleaning shall remove all loose mill scale, loose rust, loose paint, and all other loose detrimental foreign material. Before power tool cleaning, the steel surfaces shall be cleaned in accordance with 619.05(a) and 619.05(b). All loose, non-adherent paint, rust, or mill scale shall be removed in accordance with SSPC SP3, Specification for Power Tool Cleaning. After power tool cleaning, the surfaces shall again be cleaned. Acceptable final cleaning methods shall include brushing, blowing off surfaces with clean dry air, and vacuum cleaning.

(g) Power Tool Cleaning to Bare Metal. Power tool cleaning shall produce a bare metal surface and retain or produce the required surface profile. Before power tool cleaning to bare metal, the steel shall be cleaned in accordance with 619.05(a) and 619.05(b). All paint, rust, and mill scale shall be removed in accordance with SSPC SP11-87T, Specification for Power Tool Cleaning to Bare Metal. Cleaning and painting shall be so programmed such that dust, water, and other contaminants shall not fall on wet newly painted surfaces. After power tool cleaning to bare metal, the surfaces to be painted shall again be cleaned by means of brushing, blowing off surfaces with clean dry air, and vacuum cleaning. If other surface contaminants exist after cleaning, they shall be removed before the surface is painted. Care shall be exercised to ensure an excessive amount of steel is not removed.

 

(fh) Special Cleaning Methods. Where areas exist on a bridge such as

 

SECTION 619, BEGIN LINE 117, DELETE AND INSERT AS FOLLOWS:

619.06 Pollution Control. Blasting materials, scraping, wire brushing, and paint particles shall be contained in accordance with SSPC-Guide 61 (con) Class 5 3A specifically for zinc primed bridges, and SSPC-Guide 61 (con) Class 3 2A for lead primed bridges. The

 

SECTION 619, BEGIN LINE 144, INSERT AS FOLLOWS:
removed. The Contractor shall use steel grit blasting abrasives and shall recycle the blasting material when blasting lead primed bridges.

 

SECTION 619, BEGIN LINE 150, DELETE AND INSERT AS FOLLOWS:
Such container shall be labeled and maintained to prevent rain water from entering. The material shall be disposed of at an approved sanitary special waste landfill or hazardous waste landfill in the State of Indiana. All hazardous waste generated will be disposed of as required by the

 

SECTION 619, BEGIN LINE 180, DELETE AND INSERT AS FOLLOWS:
909.02(a)1b, 909.02(a)1c, 909.02(b), 909.02(a)2 and 909.02(c).It shall consist of an inorganic zinc primer with a minimum dry film thickness of 65 :m (2.5 mils) 75 :m (3.0 mils) and a maximum dry film thickness of 125 :m (5 mils) with an average dry film thickness of 90 :m (3.5 mils), and a waterborne or vinyl finish coat with a minimum dry film thickness of 75 :m (3.0 mils) having volatile organic compounds which are in accordance with IDEM requirements. The inorganic zinc primer shall be cured to a minimum resistance rating of 4 when tested in accordance with ASTM D 4752 prior to the application of the finish coat.

 

SECTION 619, BEGIN LINE 193, DELETE AND INSERT AS FOLLOWS:
zinc primed bridges. A cleaning method which is in accordance with 619.05(a), 619.05(b), 619.05(d), or 619.05(g) shall be used for spot painting. This system shall be in accordance with 909.02(a)3 and 909.02(c). It shall consist of one coat of organic zinc primer with a minimum dry film thickness of 65 :m (2.5 mils) 75 :m (3.0 mils), an average dry film thickness of 90 :m (3.5 mils), and a waterborne finish coat with a dry film thickness of 75 :m (3.0 mils).

 

SECTION 619, BEGIN LINE 199, DELETE AND INSERT AS FOLLOWS:
lead primed bridges. A cleaning method which is in accordance with 619.05(a), 619.05(b), 619.05(e), or 619.05(f) shall be 200 used for encapsulation. This system shall be in accordance with 909.03. It shall consist of a rust penetrating sealer, a prime coat of corrosion inhibited primer with a minimum dry film thickness of 75 :m (3 mils), an average dry film thickness of 90 :m (3.5 mils), and a wet film thickness of 125 :m (5 mils) on areas where the paint has been removed, and a topcoat with a dry film thickness of 125 to 175 :m (5 to 7 mils) and a wet film thickness of 200 to 255 :m (8 to 10 mils). A

 

SECTION 619, AFTER LINE 233, INSERT AS FOLLOWS:
The compressed air used for painting shall pass through an oil and water extractor before entering the paint pot.

SECTION 619, BEGIN LINE 364, INSERT AS FOLLOWS:
shall be painted after erection with the waterborne finish coat. If the specifications do not permit the material to receive an inorganic zinc primer in the shop before incorporation into the structure, the surfaces which are exposed shall be cleaned in accordance with 619.05(a), 619.05(b), and 619.05(c) before paint is applied thereto. Such surfaces shall receive the inorganic zinc primer after erection.

Before application of the waterborne finish coat, all areas where the inorganic primer was damaged during shipping, handling, and erection, and all bolts and field connections shall be cleaned in accordance with 619.05(a), 619.05(b), and 619.05(c) and painted with inorganic zinc primer to a condition equal to that required for the inorganic zinc primer applied in the shop.

SECTION 619, BEGIN LINE 399, DELETE AND INSERT AS FOLLOWS:

The bridge steel shall be cleaned in accordance with section 619.05(a), 619.05(b), 400 619.05(d), and 619.05 (f) (h). The paint system shall be in accordance with 619.07(a) and

 

SECTION 619, BEGIN LINE 413, DELETE AND INSERT AS FOLLOWS:

619.12 Encapsulation of Existing Steel Bridges. The encapsulation of an existing steel bridge shall consist of surface preparation in accordance with 619.05(a), 619.05(b), 619.05(e), or 619.05(f),and 619.05(f) (h) and application of rust penetrating sealer, spot priming, and topcoating. The paint system shall be in accordance with 619.07(c) and

 

SECTION 619, BEGIN LINE 424, INSERT AS FOLLOWS:

(b) Spot Priming. After loose or peeling paint has been removed in accordance with 619.05(e) or 619.05(f), areas shall be primed by using corrosion inhibited primer which is compatible with the total system. Such primer shall have a dry film thickness

 

SECTION 619, BEGIN LINE 317, DELETE AND INSERT AS FOLLOWS:

Primer paints shall be applied at a minimum dry film thickness of 65 :m (2.5 mils) or that which is in accordance with the manufacturer's recommendation, whichever is greater in accordance with 619.07.