RR-F-191/4F
AMERICAN SOCIETY FOR TESTING AND MATERIALS STANDARD (ASTM) (contd)
ASTM E376 - Standard Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Examination Methods
(Application for copies should be addressed to the ASTM, 100 Barr Harbor Drive, West
Conshohocken, PA 19428-2959 or www.astm.org).
3. REQUIREMENTS
3.1 Materials. Materials shall be as specified herein and in applicable
specifications and standards, and other referenced documents. Materials not specified shall be selected by the contractor and shall be subject to all provisions of this specification. Materials shall be free of defects which adversely affect performance or serviceability of the finished product.
3.2 Zinc-coating. Unless otherwise specified (see 6.1), all ferrous accessories shall be hot-dip zinc-coated with an average weight of not less than 1.2 ounces of zinc per square foot of coated surface area.
3.3 Color coating and material. When color coating is required the color shall be as specified (see 6.1), and shall match the color specified for chain-link fabric as cited in RR-F-191/1. Ferrous accessories shall be zinc-coated in accordance with 3.2, prior to application of color coating. Unless otherwise specified (see 6.1), color coating material shall be at the option of the manufacturer.
3.4 Items.
3.4.1 Item 1, caps. All exposed ends of tubular posts shall be fitted with caps. The cap shall fit snugly over the posts and exclude moisture such as rain. When top rail is provided the caps shall have a ring or hole suitable for the through passage of the top rail. Caps shall be pressed steel, malleable casting, or aluminum alloy in accordance with ASTM F626.
3.4.2 Item 2, top rail, and brace ends. Ends for top rail and braces shall be provided when top rail or braces are required. Top rail and brace ends shall be press steel, malleable casting, or aluminum alloy in accordance with ASTM F626.
3.4.3 Item 3, top rail sleeves, Top rail sleeves shall allow for expansion and contraction of the top rail. Top rail sleeves shall have a minimum length of 6 inches, and be of the same material as the top rail. Top rails provided with 3-inch swage ends are acceptable in lieu of top rail sleeves.
3.4.4 Item 4, wire ties and clips. Wire ties or clips shall be provided for attaching fabric to line posts, top rail, or tension wire. Wire ties and clips shall be at intervals not greater than 15-inches when attaching fabric or line posts, and the space interval shall not exceed 24-inches when attaching fabric to top rails or tension wire. Unless
otherwise specified (see 6.1), wire ties and clips, and wire coatings shall be as specified in ASTM F626. Wire ties and clips shall not fracture when tested in accordance with 4.4.1.
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