**NATURAL RESOURCES CONSERVATION SERVICE**

**CONSERVATION PRACTICE CONSTRUCTION SPECIFICATION**

**STRUCTURE FOR WATER CONTROL - METAL FABRICATION, CLEANING, PAINTING
AND INSTALLATION**

**CODE 587MF**

1.  **SCOPE**

> The work shall consist of furnishing, fabricating, and erecting
> metalwork, including the metal parts and fasteners of composite
> structures. The work also consists of cleaning metal surfaces and
> applying paints and protective coatings.

2.  **METAL MATERIAL**

> The metalwork shall be fabricated with the material identified on the
> drawings and in accordance with the following:
>
> [Structural Steel]{.underline}
>
> Structural steel shall conform to the requirements of ASTM A 36.
> High-strength low-alloy structural steel shall conform to ASTM A 242
> or A 588. Carbon steel plates of structural quality to be bent,
> formed, or shaped cold shall conform the ASTM A 283, Grade C. Carbon
> steel sheets of structural quality shall conform to ASTM Standard A
> 570, Grade D or A 611, Grade D. Carbon steel strip of structural
> quality shall conform to ASTM Standard A 570, Grade C.
>
> [Commercial or Merchant Quality Steel]{.underline}
>
> Commercial or merchant quality steel shall conform to the requirements
> of the applicable ASTM listed below:
>
> [Product]{.underline} [ASTM Standards]{.underline}
>
> Carbon steel bars A 575, Grade M 1015 to Grade M 1031
>
> Carbon steel sheets A 569
>
> Carbon steel strips A 569
>
> Zinc-coated carbon steel sheets A 653 or A 924
>
> [Aluminum Alloy]{.underline}
>
> Aluminum alloy products shall conform to the requirements of the
> applicable ASTM Standard listed below. Unless otherwise specified,
> alloy 6061-T6 shall be used.
>
> [Product]{.underline} [ASTM Standard]{.underline}
>
> Standard Structural Shape B 308
>
> Extruded structural pipe and tube B 429
>
> Extruded bars, rods, shapes and tubes B 221
>
> Drawn seamless tubes B 210
>
> Rolled or cold-finished bars, rods and wire B 211
>
> Sheet and plate B 209
>
> [Bolts]{.underline}
>
> Steel bolts shall conform to the requirements of ASTM Standard A 307.
> If high-strength bolts are specified, they shall conform to the
> requirements of ASTM A 325.
>
> When galvanized or zinc-coated bolts are specified, the zinc coating
> shall conform to the requirements of ASTM Standard A 153; except that
> bolts 1/2 inch or less in diameter may be coated with
> electro-deposited zinc or cadmium coating conforming to the
> requirements of ASTM Standard B 633, Service Condition SC 3 or ASTM A
> 165, Type TS, unless otherwise specified.
>
> [Rivets]{.underline}
>
> Unless otherwise specified, steel rivets shall conform to the
> requirements of ASTM Specification A 502, Grade 1. Unless otherwise
> specified, aluminum alloy rivets shall be Alloy 606-T6 conforming to
> the requirements of ASTM Standard B 316.

3.  **PAINT MATERIAL**

> The term "paint" as used herein includes emulsions, primers, enamels,
> stains, varnishes, sealers, and other coatings, whether used as prime,
> intermediate, or finish coat. Proprietary names are not intended to
> imply that products named are required, or to exclude equal products
> of other manufacturers. Unless otherwise specified or shown on the
> drawings, the following shall apply:
>
> [Metal Priming]{.underline}
>
> Items specified to be galvanized shall be completely fabricated for
> field assembly before the application of the zinc coatings. The metal
> priming paint for use on galvanized or zinc surfaces shall be a zinc
> dust-zinc oxide primer conforming to Federal Specification TT-P-641.
> The following may be incorporated in the work:
>
> Sherwin-Williams Galvanized Iron Primer, B50A1
>
> The metal priming paint for use on all other surfaces shall meet
> Federal Specification TT-P-636 The following may be incorporated in
> the work:
>
> Wellborn TT-P-645 Primer
>
> Sherwin-Williams Kem-Kromik Primer B50W1 (white) or B50N2 (brown), or
> Kem-Flash E61A45
>
> Rust Oleum 7773 Primer or 773 Industrial Primer
>
> [Top Finish Coats]{.underline}
>
> Top finish coats shall meet Federal Specification TT-E-489 or
> TT-E-529. The following may be incorporated in the work:
>
> Wellborn Qwik Gloss, All Purpose Enamel, or #90 Semi Gloss
>
> Sherwin-Williams Gloss Metalastic II Enamel, B53 Series, or Industrial
> Enamel, B54 Series
>
> Rust-Oleum New Color Horizons High Gloss Finishes
>
> Rust-Oleum Topcoat (i.e., 7771-Sand)
>
> Aluminum paint shall meet AASHO M69-70 Specifications. The following
> may be incorporated in the work:
>
> Sherwin-Williams Silver-Brite No. B59S2
>
> Pittsburgh No. 22-30 Metaleaf Aluminum

4.  **FABRICATION**

> The metalwork shall be fabricated to the dimensions shown on the
> drawings
>
> Galvanized items shall not be cut, welded, or drilled after the zinc
> coating is applied.

5.  **CLEANING**

> Surfaces to be painted shall be thoroughly cleaned prior to the
> application of the paint. All grease and oil shall be removed from the
> metal surface by steam cleaning or by solvent cleaning. All dirt,
> surface rust, and loose scale shall be removed by wire brushing, flame
> cleaning, use of rotary abrading tools, or light sand blasting.

6.  **PAINTING**

> Paint shall not be applied when the temperature of the item to be
> painted or of the surrounding air is less than 45 °F. Painting shall
> be done only when the humidity and temperature of the surrounding air
> and the temperature of the metal surfaces are such that evaporation
> rather than condensation will result.
>
> Surfaces shall be painted immediately after cleaning.
>
> One priming coat is required and may be applied by brush or spray.
>
> A minimum of two finish coats is required. Additional finish coats may
> be necessary to attain a total dry-film thickness of 6 mils.
>
> The drying time between coats shall be as prescribed by the paint
> manufacturer, but not less than that required for the paint film to
> thoroughly dry. The elapsed time between coats shall not exceed 60
> hours.
>
> The finished surface of each coat shall be free from runs, drops,
> ridges, laps, or excessive brush marks, and shall present no variation
> in color, texture, and finish.

7.  **MEASUREMENT**

> Metal fabrication, cleaning, painting, and installation will be
> measured by the job.
>
> Project Name:
>
> Date:

8.  **ITEMS OF WORK AND CONSTRUCTION DETAILS**

> Items of work to be prepared in conformance with this specification
> and the construction details are: